identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03D6B32E8209D42B3ECAF8B37419FC0E.text	03D6B32E8209D42B3ECAF8B37419FC0E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Ambrysus signoreti Stal	<div><p>Ambrysus signoreti Stål species complex</p> <p>Discussion. It was Usinger (1946: 203) who first made reference to the signoreti complex when describing 16 new species in Ambrysus. It was in the description of his A. sonorensis that he stated the species belonged to this complex. Unfortunately, he did not provide a list of the group's unifying features nor the constituent species. The succeeding mention of the complex was by La Rivers (1951), in his work on the genus Ambrysus in the United States, where he designated seven additional complexes to accommodate the North American species in the genus. This author also failed to list the diagnostic features and members of the complex, except for A. mormon Montandon, which he considered to be the most distinctive element of the complex. Regarding the signoreti complex, La Rivers (1951) stated without specifics:</p> <p>" is the most complex unit of the entire genus and the largest in point of species"</p> <p>"is difficult on purely technical grounds to sharply characterize"</p> <p>"displays a homogeneity of form and coloration, which is unmistakable"</p> <p>Later, La Rivers (1957) described A. drakei, from northwestern Mexico, and assigned it to the signoreti complex. In this work, La Rivers finally listed the group's unifying attributes, which included: 1) broad body shape, 2) wide embolia, 3) prominent maculation, and 4) species often with spinose posterolateral corners of abdominal segments. Even with this list, La Rivers failed to explicitly mention the constituent species; only A. signoreti Stål, A. sonorensis Usinger, A. mormon, and A. drakei La Rivers were known to belong to the complex. Based on the current concept of the signoreti complex, we know that at that time, at least 13 species belonging to the complex (most of them authored by La Rivers) had been already described.</p> <p>* Sections are based on characteristics of the female subgenital plate:</p> <p>1 - posterolateral corners extending posteriorly further than central lobe.</p> <p>2 - central lobe extending posteriorly further than posterolateral corners.</p> <p>3 - posterolateral corners and central lobe at same level</p> <p>.</p> <p>It is only based on the recent studies that have focused on the characterization and circumscription of the genus Ambrysus and its nominotypical subgenus (Reynoso-Velasco &amp; Sites 2021), as well as the species complexes in this subgenus (Reynoso-Velasco &amp; Sites 2016a, 2016b, 2018a, 2018b), that we know that based on characteristics of the male phallosoma the signoreti complex includes 24 species distributed in North America (see Table 1). In addition to the morphological data, molecular evidence also supports a close relationship of species in this complex (see Reynoso-Velasco &amp; Sites 2021). La Rivers (1951, 1957) assigned A. mormon and A. drakei to the signoreti complex; also, the former species was preliminarily assigned to this complex by Reynoso-Velasco (2021a), but characteristics of the phallosoma clearly indicate the two species belong to the A. guttatipennis species complex.</p> <p>For convenience, the species-rich A. signoreti complex is herein organized into three sections (see Table 1). This organization is artificial and does not necessarily indicate a close relationship among the species. It is based on conspicuous characteristics of the female subgenital plate: 1) posterolateral corners extending posteriorly slightly further than the central lobe (Fig. 1A), 2) central lobe extending posteriorly further than the posterolateral corners (Fig. 1B), and 3) posterolateral corners and central lobe almost at the same level (Fig. 1C).</p> <p>Diagnosis. Similar to other species complexes, the most reliable unifying feature among species in the A. signoreti complex is the male phallosoma and includes the presence of small protuberances (pointed or rounded), referred to as "denticles," on the sclerotized and variously shaped endosomal sclerites (e.g., Fig. 2E). In a few species, the right sclerite is reduced, greatly reduced (Fig. 5E) or absent; nonetheless, the protuberances are present on the left sclerite, which can also be reduced. Only one species, A. signoreti, lacks both sclerites and in consequence the protuberances; notwithstanding, molecular evidence clearly supports the inclusion of the species in this complex (Reynoso-Velasco &amp; Sites 2021). Additionally, the great majority of species in this complex, including A. signoreti, exhibit a characteristic maculation, as suggested but not described by La Rivers (1957). This feature includes extensive light-colored markings (sometimes spotted) at the lateral and posterior margins of the corium (e.g., Fig. 10A). In some species, the marking on the posterior margin extends along the posterolateral angle of the corium (e.g., Fig. 2A).</p> </div>	https://treatment.plazi.org/id/03D6B32E8209D42B3ECAF8B37419FC0E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Reynoso-Velasco, Daniel;Sites, Robert W.	Reynoso-Velasco, Daniel, Sites, Robert W. (2022): Revision of the Ambrysus signoreti Stål species complex (Heteroptera: Naucoridae Ambrysinae). Section 1. Zootaxa 5214 (3): 421-439, DOI: https://doi.org/10.11646/zootaxa.5214.3.5
03D6B32E820CD4203ECAFCEC7764FA22.text	03D6B32E820CD4203ECAFCEC7764FA22.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Ambrysus cosmius La Rivers	<div><p>Ambrysus cosmius La Rivers</p> <p>(Figs. 1A, 2–4)</p> <p>A. cosmius La Rivers 1953: Univ. Kans. Sci. Bull., 35: 1329–1331 (original description).</p> <p>Supplemental description. Female. Mediosternite VII (SGP) asymmetrical; left margin with rounded, marginally sclerotized, lateral lobe at mid-length; right margin with inconspicuous lobe at mid-length; central lobe shallowly concave medially, giving the appearance of two lobes; posterolateral corners elongate, narrowly rounded apically, extending posteriorly further than central lobe (Fig. 2B).</p> <p>Male. Accessory genitalic process of tergum VI curved to right at approximately 55 degree at proximal third, angled again at approximately 120 degree almost at mid-length (Fig. 2C). Medial lobes of tergum VIII (pseudoparameres) symmetrical, posterolateral corner narrowly rounded, posteromesal corners broadly rounded, posterior margin slightly concave medially (Fig. 2D). Phallosoma elongate, linear, slender, tapering dorsoapically; endosomal sclerites knob-like apically, with conspicuous denticles; right sclerite extending basally further than left sclerite (Fig. 2E). Parameres symmetrical, almost as long as maximum width, mesal margin convex. Proctiger almost as long as width at base. Pygophore with elongate setae sparsely distributed over most of surface, with thick brush of elongate setae on posterior margin (Fig. 2F).</p> <p>Diagnosis. This species can be distinguished from the other three in this section by the female SGP with a rounded lateral lobe at mid-length on the left margin and symmetrical, digitate posterolateral corners (Fig. 2B). Additionally, the male AGP tapers distally to a pointed and anterolaterally directed apex (Fig. 2C) and the pseudoparamere posterolateral corners are narrowly rounded (Fig. 2D).</p> <p>Comparative notes. Ambrysus cosmius La Rivers exhibits a generally similar SGP to that of A. schuhi Reynoso &amp; Sites and A. variegatus Usinger; however, its posterolateral corners are symmetrical and digitate, whereas those of A. variegatus are subtriangular and those of A. schuhi are asymmetrical. Although the morphology of the male endosomal sclerites is similar among these three species, the denticles in A. cosmius are more conspicuous. The anterolaterally directed apex of the male AGP is a unique condition within the signoreti complex; in all other species the apex is, at most, laterally directed.</p> <p>Discussion. This species measures 12.12–14.37 mm in length and 8.12–9.37 mm in width.Many of the specimens in the type series were collected by Usinger and Hinton in their trip to central Mexico during the spring and summer of 1933. At that time, taxonomic knowledge of the genus was inadequate, resulting in the misidentification of some of these specimens as representatives of A. signoreti (see Additional material examined section). According to La Rivers (1953), this misconception remained until Usinger was able to examine the type of A. signoreti in the Swedish Museum of Natural History. In the original description, La Rivers (1953) reported A. cosmius from the states of Guerrero, México, Morelos, and Oaxaca. During examination of specimens at the EMEC, we found two females from Michoacán, which were positively identified as belonging to A. cosmius. These two specimens were originally labeled by La Rivers as paratypes of A. cosmius, but were not reported in the original description or any subsequent publication (see Additional material examined section).</p> <p>Variation. Some females can exhibit the lobe on the left margin of the SGP narrowly rounded, giving the appearance of a "pointed" lobe. Also, the small lobe on right margin can be absent. Males can have the AGP laterally directed.</p> <p>Type locality. Mexico: Estado de México: Mpio. Tejupilco, Tejupilco.</p> <p>Repository. Male holotype (Fig. 3) is housed at the CAS.</p> <p>Published records: Mexico: Estado de México, Guerrero, Morelos, Oaxaca (La Rivers 1953, Davis 1986, Reynoso-Velasco &amp; Sites 2019b).</p> <p>New records: Mexico: Jalisco, Michoacán, Puebla, Veracruz.</p> <p>Distribution. This species is exclusively distributed in Mexico, in the south-central part of the country (Fig. 4), with the majority of sites located within the Balsas Basin biogeographic province. All the localities are at an elevation below 2,000 meters, with the majority between 500–1,800 meters. Outside the limits of the Balsas Basin, the species is predominantly distributed in the Sierra Madre del Sur biogeographic province, with localities in its central Michoacán and eastern Oaxaca Highlands districts. A single locality from Guerrero is in the Pacific Lowlands province and another from Oaxaca is in the Veracruzan province.</p> <p>Type material examined. HOLOTYPE ♂ (by original designation). MEXICO: ESTADO DE MÉXICO: [Mpio. Tejupilco], Tejupilco, Temescaltepec [District of Temascaltepec], 19-VI-1933 / H.E. Hinton &amp; R.L. Usinger collectors / Ambrysus cosmius La Rivers HOLOTYPE / Ambrysus cosmius La Rivers determined by Ira La Rivers '50 / California Academy of Sciences Type No. 10056. PARATYPES: same data as holotype (2♀ CAS); same but 15-VI-1933 / Ambrysus cosmius La Rivers ALLOTYPE (1♀ CAS). GUERRERO: [Mpio. Chilapa de Álvarez], Chilapa, 29-X-1930, Prof. L Schultze / Ambrysus cosmius La Rivers Paratype (1♀ EMEC; 2♂ USNM); [Mpio. Tecpan de Galeana], Tecpan, 02-IV-1930, Prof. L Schultze / Ambrysus cosmius La Rivers Paratype (2♂, 3♀ SEMC); same but / Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (1♂ CAS; 1♀ CNIN). MORELOS: 14-VII-1936, H.D. Thomas / Ambrysus cosmius La Rivers Paratype (1♂, 1♀ SEMC); same but / Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (1♀ CAS); [Mpio. Temixco], Acatlipa, km 88 on Hwy Mexico City-Acapulco / 06-V-1945, J.G. Shaw / Ambrysus cosmius La Rivers Paratype (1♀ EMEC); same but / Ambrysus cosmius La Rivers determined by Ira La Rivers '50 / Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (1♀ CAS). OAXACA: Oaxaca, 25-VIII-1937, H.D. Thomas / Ambrysus cosmius La Rivers Paratype (1♀ SEMC).</p> <p>Additional material examined. MEXICO: ESTADO DE MÉXICO: Mpio. Amatepec, Río San Felipe at Las Adjuntas, 20-IV-2004, R. Novelo coll. (1♂, 3♀ IEXA); same but 05-V-2008, R. Novelo &amp; K. Cuevas colls. (2♂, 5♀ IEXA); Mpio. Amatepec, Río San Felipe at San Felipe de Jesús, [approx. 18.799 2, -100.1639], 1,000 m, 20-IV-2004, R. Novelo coll. (1♀ IEXA); [Mpio. Amatepec], Rio San Felipe at San Felipe de Jesús, 20-IV-2004, 3,280' (1♂ EMEC); same but / William D. Shepard, leg. (2♂ EMEC); Mpio. Santo Tomás, [Río Tilastoc at] <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-100.289&amp;materialsCitation.latitude=19.174833" title="Search Plazi for locations around (long -100.289/lat 19.174833)">Santa Bárbara</a>, 19º10'29.4''N, 100º17'20.4''W, 1,051 m, 20-XII-2012, L-1463, Reynoso-Velasco coll. (1♂ UMC); [Mpio. Tejupilco], Tejupilco, Temescaltepec [District of Temascaltepec], 15-VI-1933 / H.E. Hinton &amp; R.L. Usinger collectors (1♂, 3♀ EMEC); same but Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (1♂ CAS); [Mpio. Tejupilco], Tejupilco, Temescaltepec [District of Temascaltepec], 19-VI-1933 / H.E. Hinton &amp; R.L. Usinger collectors (2♂ EMEC); same but / Ambrysus signoreti Stål (1♀ EMEC); [Mpio. Tejupilco], Tejupilco, Temescaltepec [District of Temascaltepec], 21-VI-1933 / H.E. Hinton &amp; R.L. Usinger collectors (1♀ EMEC); same but / exch. @ RLU 1968 / Ambrysus signoreti Stål det. R.L. Usinger / C.J. Drake Accession (1♀ USNM); [Mpio. Tejupilco], Tejupilco, Temescaltepec [District of Temascaltepec], 13-VII-1932 [1933] / H.E. Hinton &amp; R.L. Usinger collectors (1♀ EMEC); same but / Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (1♀ CAS); [Mpio. Tejupilco], Tejupilco, Temescaltepec [District of Temascaltepec], VII-1934 / H.E. Hinton (2♂, 2♀ EMEC); Temascaltepec, 11-VII-1933, Robert L. Usinger, Cal.Acad.Sci.Coll. / Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (1♂, 1♀ CAS); same but no date, #880, R.L. Usinger, H.E. Hinton (1♂, 3♀ CAS). GUERRERO: Mpio. Teloloapan, [Arroyo El Naranjo] at km 20 on carr. Teloloapan-Apaxtla de Castrejón, nr. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.91417&amp;materialsCitation.latitude=18.240778" title="Search Plazi for locations around (long -99.91417/lat 18.240778)">Tepozanalquillo</a>, 18º14'26.8''N, 99º54'51''W, 1083 m, 29-XII-2012, L-1497, Reynoso-Velasco coll. (1♂ IEXA); Mpio. Teloloapan, Río Oxtotitlán at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.94009&amp;materialsCitation.latitude=18.193249" title="Search Plazi for locations around (long -99.94009/lat 18.193249)">Oxtotitlán</a>, 18º11'35.7''N, 99º56'24.3''W, 1009 m, 29-XII-2012, L-1498, Reynoso-Velasco coll. (2♂, 1♀ IEXA); Mpio. Tepecoacuilco, [Río Atoyac at San Agustín] <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.46078&amp;materialsCitation.latitude=17.952961" title="Search Plazi for locations around (long -99.46078/lat 17.952961)">Oapan</a>, 17º57'10.66''N, 99º27'38.8''W, 496 m, J. Amith coll. (1♀ UMC). JALISCO: [Mpio Tuxpan], nr Atentique [Atenquique], CL740, 12-VI-1975, J.T. Polhemus / J.C. Drake Accession (1♀ USNM). MICHOACÁN: [Mpio Aguililla, Río Aguililla at] Aguililla, [approx. 18.728 5, -102.7934], 03-IV-2005, R. Novelo coll. (1♂, 1♀ UMC); same but 02-X-2005, J.A. Gómez coll. (2♀ IEXA); [Mpio. Chinicuila, Río La Tortuga at] Villa Victoria, [approx. 18.751 0, -103.3600], 17-V-2002, R. Novelo coll. (1♀ UMC); Mpio. Coalcomán, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-103.21706&amp;materialsCitation.latitude=18.743334" title="Search Plazi for locations around (long -103.21706/lat 18.743334)">La Chichihua</a>, [approx. 18º44'36''N, 103º13'1.39''W], 10-VII-2005, R. Novelo &amp; J.A. Gómez colls. (1♀ IEXA); [Mpio. Tuxpan], 5 mi N of Tuxpan, 16-VII-1953, 5,500 ft / Univ. Kans. Mex. Expedition / Slesnick Field N0. 48 / Ambrysus cosmius La Rivers 1953 (Ira La Rivers) / Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (1♀ CAS); Mpio. Tuzantla, Río Tuzantla at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-100.56819&amp;materialsCitation.latitude=19.221695" title="Search Plazi for locations around (long -100.56819/lat 19.221695)">Tuzantla</a>, 19º13'18.1''N, 100º34'05.5''W, 593 m, 21-XII-2012, L-1470, Reynoso-Velasco coll. (1♂ IEXA); [Mpio. Tzitzio], near Chinapa, 05-IX-1938 / Ambrysus cosmius Paratype (2♀ SEMC) [unpublished paratypes]. MORELOS: Mpio. Amacuzac, Río Amacuzac 1.6 km S (on dirt road) of km 50 carr. MEX 95 <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.39941&amp;materialsCitation.latitude=18.596682" title="Search Plazi for locations around (long -99.39941/lat 18.596682)">Cuernavaca-Taxco</a>, 18º35'48.05''N, 99º23'57.88''W, 917 m, 04-I-2017, L-1990, Reynoso-Velasco coll. (2♀ IEXA); Mpio. Jojutla, Río Amacuzac at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.28092&amp;materialsCitation.latitude=18.562555" title="Search Plazi for locations around (long -99.28092/lat 18.562555)">Tehuiztla</a>, 18º33'45.2''N, 99º16'51.3''W, 853 m, 28-IV-2011, L-1308 Reynoso-Velasco coll. (4♂, 1♀ UMC); same but 18º32'47.9''N, 99º16'03.6''W, 854 m, L-1309 (1♂, 3♀ UMC); Mpio. Xochitepec, [Río Cuentepec at] Balneario Palo Bolero, [approx. 18.766 8, -99.2393], 07-VII-1987, R. Novelo coll. (1♂, 2♀ IEXA); Mpio. Xochitepec, Río Sabinos (Cuentepec) at Jardines de Xochitepec, [approx. 18.778 9, -99.2439], 24-IX-1998, R. Novelo coll. (1♂, 2♀ IEXA); same but 05-IV-2002, (3♀ IEXA); same but 24-IV-2003 (1♂, 2♀ IEXA). OAXACA: Mpio. Putla Villa de Guerrero, Putla, [Río Cuchara] at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-97.919945&amp;materialsCitation.latitude=17.01861" title="Search Plazi for locations around (long -97.919945/lat 17.01861)">Pte. La Cuchara</a>, 17º01'07''N, 97º55'11.8''W, 711 m, 30-V-2012, L-1396, ReynosoVelasco coll. (2♂, 1♀ UMC); same but [<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-97.91192&amp;materialsCitation.latitude=17.039305" title="Search Plazi for locations around (long -97.91192/lat 17.039305)">Río Cuchara</a> at] 17º02'21.5''N, 97º54'42.9''W, 767 m, L-1397 (1♂ UMC); Mpio. San Antonio Nanahuatípam, Río Salado at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-97.1285&amp;materialsCitation.latitude=18.133167" title="Search Plazi for locations around (long -97.1285/lat 18.133167)">San</a> Antonio Nanahuatípam, 18°07'59.4''N, 97°07'42.6''W, 790 m, 24-III-2015, L-1877, Reynoso-Velasco, Sites, Shepard, &amp; Barr colls. (4♂, 10♀ IEXA); [Mpio. San Antonio Nanahuatípam], Río Saldo at [San Gabriel] Casa Blanca, [approx. 18.155 1, -97.1371], 01-III-1976, R.R. &amp; F.H. Miller, M76-41 (1♀ UMMZ); Mpio. San Felipe Jalapa de Díaz, Río Sto. Domingo at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-96.549225&amp;materialsCitation.latitude=18.03775" title="Search Plazi for locations around (long -96.549225/lat 18.03775)">Sto. Domingo</a>, 18°02'15.9''N, 96°32'57.2''W, 100 m, 25-IV-2015, L-1881, Reynoso-Velasco, Sites, Shepard &amp; Barr colls. (5♂, 4♀ IEXA); [Mpio. San Juan Bautista Cuicatlán], Río Las Huertas [Las Vueltas] at Santiago Dominguillo, 12-VII-1996, R. Barba &amp; A. Rojas colls. / Colección del Instituto de Biología, UNAM. México D.F. (2♂, 3♀ UMC); Mpio. San Juan Bautista Cuicatlán, [Río Las Vueltas at] <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-96.910194&amp;materialsCitation.latitude=17.64611" title="Search Plazi for locations around (long -96.910194/lat 17.64611)">Santiago Dominguillo</a>, 17º38'46''N, 96º54'36.7''W, 726 m, 01-VI-2012, L-1405, Reynoso-Velasco coll. (1♂, 2♀ CNIN; 4♂, 9♀ IEXA; 18♂, 16♀ UMC); [Mpio. San Pedro Totolápam], Rio Grande [at] Totolapan [Totolápam], CL1063, 29-IV-1964, J.T. &amp; M.S. Polhemus / Ambrysus cosmius '67 La Riv. Det. J.T. Polhemus (1♂ EMEC); same but / C.J. Drake Accession (4♂, 3♀ USNM); [Mpio. Santa María Tecomavaca, Arroyo Los Cués at] San Juan de Los Cués, 14-VI-1984, Mario García coll. / Colección del Instituto de Biología, UNAM. México D.F. / C.J. Drake Accession (1♀ USNM); same but / J.T. Polhemus Collection 2014 (1♀ USNM); [Mpio. Santa María Tecomavaca], Río Salado [at Pte. El Saldo], 16 km S of San Juan de Los Cués on carr. MEX 135 <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-97.00117&amp;materialsCitation.latitude=17.930695" title="Search Plazi for locations around (long -97.00117/lat 17.930695)">Tehuacán-San Francisco Telixtlahuaca</a>, 17º55'50.5''N, 97º00'04.2''W, 544 m, 01-VI-2014, L-1407, Reynoso-Velasco coll. (2♂, 2♀ CNIN; 7♂, 15♀ IEXA; 2♀ UMC); Mpio. Valerio Trujano, Río Grande at Pte. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-96.94975&amp;materialsCitation.latitude=17.756945" title="Search Plazi for locations around (long -96.94975/lat 17.756945)">Río Grande</a>, km 124 carr. MEX 135 <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-96.94975&amp;materialsCitation.latitude=17.756945" title="Search Plazi for locations around (long -96.94975/lat 17.756945)">Tehuacán-San Francisco Telixtlahuaca</a> on jct. to <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-96.94975&amp;materialsCitation.latitude=17.756945" title="Search Plazi for locations around (long -96.94975/lat 17.756945)">Tomellín</a>, 17º45'25''N, 96º56'59.1''W, 607 m, 01-VI-2012, L-1406, Reynoso-Velasco coll. (3♂, 2♀ CNIN; 21♂, 13♀ IEXA; 2♂, 2♀ NHMW; 12♂, 13♀ UMC); San Cristobal, 17-VI-84, H. Velazco coll. / Colección del Instituto de Biología, UNAM. México D.F. (1♀ UMC); 18 mi NW El Camarón, 20-VIII-1959, A.E. Menke coll. / Ambrysus cosmius La Rivers 1953 (Ira La Rivers) / Ira La Rivers Collection bequeathed to the California Academy of Sciences - 1978 (2♂, 2♀ CAS; 1♀ CNIN); 25 mi S of Mitla, 04-I-1956, J.C. Schaffner / Ambrysus cosmius '67 LaR det. J.T. Polhemus / C.J. Drake Accession (1♀ USNM). PUEBLA: Mpio. Coxcatlán, [Río Tepazalco at] <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-97.19014&amp;materialsCitation.latitude=18.252028" title="Search Plazi for locations around (long -97.19014/lat 18.252028)">La Estación</a>, 5 km SW of Coxcatlán, 18°15'07.3''N, 97°11'24.5''W, 950 m, 24-III-2015, L-1876, Reynoso-Velasco, Sites, Shepard, &amp; Barr colls. (2♀ IEXA). VERACRUZ: [Mpio. Fortín], Río Metalac [Metlac] 3 mi N of El Fortín [Fortín de Las Flores, approx. 18.931 2, -97.0211], 2-VII-1955, R.B. &amp; J.M. Selander (1♂, 2♀ BYU). <p>Ambrysus morelosensis Reynoso &amp; Sites NEW SPECIES</p> <p>(Figs. 5 –7)</p> <p>Description. Macropterous female. HOLOTYPE, length 12.87; maximum width 8.12. Paratypes (n = 1), length 11.75; maximum width 7.63. General shape elliptical; widest across embolia. Overall dorsal coloration of hemelytra dark-brown with light-brown marks; head light-brown; pronotum brown with dark-brown marks; legs brown (Fig. 5A). Dorsal surface coarsely punctate. Ventral coloration of head and thorax light-brown, abdomen with yellowishbrown pubescence.</p> <p>Head. Head length 1.73; maximum width 3.41. Mostly light-brown with dark-brown marks along midline and posteriorly; coarsely punctate. Eyes convergent anteriorly, synthlipsis 1.73; thin band of cuticle along posterolateral margin of eye; eyes not raised above level of vertex or pronotum. Anterior margin between eyes convex, extending anteriorly in front of eyes 10.71% of head length; posterior margin between eyes strongly convex, extending posteriorly 28.57% of head length. Labrum width 2.00× length, evenly rounded. Labium with three visible light-brown segments, darkening distally, extending 0.76 beyond labrum not including extruded stylets. Antennal proportions 5:14:19:9, length 0.94, not reaching lateral margin of eye, elongate hairs on segment 4 and distal half of 3.</p> <p>Thorax. Pronotum coarsely punctate, ground color brown, dark-brown marking medially, dark-brown line behind eye; transverse sulcus marking anterior border of transverse band in posterior 1/3; transverse band brown; lateral margins light-brown, convergent, evenly convex, explanate; posterior margin almost straight; anterior margin deeply concave between eyes to embrace convex posterior margin of head; posterolateral corners rounded; width 2.86× length; length at midline 2.35; maximum width at posterolateral corners 6.75. Prothorax ventrally pruinose throughout, except laterally; apices of propleura meeting at midline, not appressed to prosternellum; propleuron light-brown, medial 2/3 of posterior margin with golden setae. Probasisternum with sharp median carina and row of setae lateral to carina. Prosternellum not covered by apices of propleura. Scutellum coarsely punctate, triangular, brown, two reniform to ovate dark-brown marks medially, width 2.02× length, width 4.52, length 2.23. Hemelytra densely punctate, mostly dark-brown, length 9.20 (chord measurement); corium dark-brown, lightbrown irregularly shaped and checkmark-shaped markings at lateral and posterior margins, respectively. Clavus dark-brown, light-brown at mid-length and apically, length 3.80× width, length 4.71, width 1.24; claval commissure black, length 1.24. Embolium length 3.53, greatest width 1.30; lateral margin convex, yellowish-brown in anterior 2/3, dark-brown posteriorly. Membrane dark-brown (Fig. 5A). Hindwings extending to posterior margin of tergum VI. Mesobasisternum midventral tumescence negligible, with sulcus on midline continuing through triangular mesosternellum. Metasternellum (= metaxyphus) transverse, subtriangular, with median carina.</p> <p>Legs. All legs segments brown. Profemur posterior margin with row of tightly arranged setae in basal 2/3, row of short brown spines along middle third; anterior margin with dense pad of setae without associated spines. Protibia and tarsus with occlusal inner surface flattened; tarsus immovable, one-segmented; pretarsal claw single, minute, triangular. Procoxa with cluster of stout, brown anteromedial spines. Meso- and metacoxae partially recessed into thorax. Meso- and metafemora with row of short, brown spines on anterior margin; spines restricted to basal half on mesofemur, nearly full length of metafemur. Mesotibiae with ventrolateral and dorsolateral rows of stout reddishbrown spines; mesolateral rows intermixed with combs of spines. Metatibia with ventrolateral and dorsolateral rows of stout reddish-brown spines. Meso- and metatibiae with semi-circlet of spines at apex of dorsal and mesal margins; two comb rows of stout spines near apex of ventral margin. Meso- and metatibiae and metatarsus with long, yellow to brown swimming hairs; hairs profuse on metatibia and -tarsus. Meso- and metapretarsi with paired claws slender, gently curved, with small basal tooth. Leg measurements as follows: foreleg, femur 3.10, tibia 2.41, tarsus 0.55; middle leg, femur 2.97, tibia 2.79, tarsomeres 1–3, 0.18, 0.54, 0.66; hind leg, femur 3.90, tibia 4.65, tarsomeres 1–3, 0.31, 1.00, 0.90.</p> <p>Abdomen. Dorsally with lateral margins of III–VIII exposed, IV–VI each dark-brown in anterior 1/3 and yellowish-brown posteriorly; lateral margins of II to basal half of III smooth, distal half of III–VI finely serrate, marginal row of profuse and short yellow setae, group of trichobothria near posterolateral corners. Posterolateral corner of II (visible ventrally) right angled, III–VI acute. Ventrally yellowish-brown to brown, with dense pile of fine hairs. Lateral margin with thin, glabrous band. Glabrous rounded to oval patches clearly visible around spiracles on laterosternites II–VI. Mediosternite VII (subgenital plate) asymmetrical, width 1.36× length; length at midline 1.26; maximum width 1.72; left margin with broadly rounded lobe occupying its entire length; right margin with small apical lobe; posterolateral corners short, pointed, subtriangular, extending posteriorly further than the central lobe; central lobe poorly developed, inconspicuous, shallowly concave medially (Fig. 5B).</p> <p>Macropterous male. Paratypes (n = 1), length 11.88; maximum width 7.75. Coloration, setation, pronotum proportions, posterolateral corners of pronotum, scutellum proportions, embolium length generally same as for holotype. Otherwise hindwings extending to posterior margin of tergum V. Accessory genitalic process of tergum VI gently curved to right close to base, distal 1/3 angled to right to continue perpendicular to body axis (Fig. 5C). Medial lobes of tergum VIII (pseudoparameres) symmetrical, posterolateral corners narrowly rounded, posteromesal corners broadly rounded, posterior margin concave (Fig. 5D). Phallosoma elongate, linear, slender, broadly rounded dorsoapically; left endosomal sclerite reduced, with few small and inconspicuous denticles; right endosomal sclerite vestigial, rounded, without denticles (Fig. 5E). Parameres symmetrical, slightly longer than maximum width, mesal margin rounded, setae emanating from distal half of dorsal surface. Proctiger almost as long as width at base. Pygophore with anterior margin obtuse to subobtuse medially, elongate setae sparsely distributed over most of surface, with thick brush of elongate setae on posterior margin (Fig. 5F).</p> <p>Diagnosis. This species can be distinguished from the other three in this section by the female SGP with a large, plate-like, rounded lobe on the left margin and symmetrical subtriangular posterolateral corners (Fig. 5B). Additionally, the male AGP tapers distally to a pointed and laterally directed apex (Fig. 5C) and the pseudoparamere posterolateral corners are narrowly rounded (Fig. 5D).</p> <p>Comparative notes. Ambrysus morelosensis presents a unique female SGP; none of the other three species in this group exhibits a similar large lobe on the left margin. The only other two species in the complex with a "comparable" feature are A. scalenus La Rivers and A. sitesi Reynoso; nonetheless, the lobe is truncate in A. scalenus and in both species it is located at mid-length, not occupying the entire margin as in the new species. Additionally, these two species present the central lobe almost at the same level as the posterolateral corners, whereas in A. morelosensis n. sp. the central lobe is poorly expressed, almost flat, and clearly below the level of the posterolateral corners. This new species is superficially similar to A. sitesi; this similarity together with the "comparable" female SGP and the similar male pseudoparameres suggest a close relationship.</p> <p>Variation. The single female paratype exhibits the posterior margin of the SGP evenly concave between the blunt posterolateral corners and the small apical lobe on the right margin is absent.</p> <p>Habitat description. The type locality, Río Amacuzac at Huajintlán, is in the southwestern area of the Mexican state of Morelos at an elevation of 931 meters. The first author visited the type locality (L-1989) three decades after the type specimens were collected; unfortunately, no more specimens of A. morelosensis were found, only numerous specimens of A. hydor La Rivers. At the time, the river at the type locality was approximately 40 meters wide and shallow, exposing boulders and cobble (Fig. 6).</p> <p>Distribution. Ambrysus morelosensis is known from only two localities, one in the state of Michoacán and the other in Morelos, in central-western and central Mexico, respectively (Fig. 7). Both localities are at elevations below 1,000 meters and within the limits of the Balsas Basin biogeographical province; more specifically, in the middle (Morelos) and lower (Michoacán) sections of the basin.</p> <p>Etymology. The specific epithet " morelosensis " is in reference to the central Mexican state of Morelos, where the type locality is located. The species name means The Ambrysus from Morelos.</p> <p>Repository. The holotype and paratypes will be deposited in the Colección Entomológica del Instituto de Ecología A.C. (IEXA).</p> <p>Type material examined. HOLOTYPE ♀. MEXICO: MORELOS: [Mpio. Amacuzac, Río Amacuzac at Huajintlán], km 50 [on carr. 95] <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.42788&amp;materialsCitation.latitude=18.609879" title="Search Plazi for locations around (long -99.42788/lat 18.609879)">Cuernavaca-Taxco</a>, [18º36'35.56''N, 99º25'40.38''W, 931 m], 09-III-1985, M. Albores coll. PARATYPES: same data as holotype (1♂ IEXA). MICHOACÁN: Mpio. Buenavista, Buenavista River at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-102.57506&amp;materialsCitation.latitude=19.216057" title="Search Plazi for locations around (long -102.57506/lat 19.216057)">Buenavista Tomatlán</a>, below dam, 19º12'57.8''N, 102º34'30.2''W, 440 m, 24-XII-2012, L-1481, ReynosoVelasco, D. coll. (1♀ IEXA).</p> </p> <p>Ambrysus morelosensis Reynoso &amp; Sites NEW SPECIES</p> <p>(Figs. 5 –7)</p> <p>Description. Macropterous female. HOLOTYPE, length 12.87; maximum width 8.12. Paratypes (n = 1), length 11.75; maximum width 7.63. General shape elliptical; widest across embolia. Overall dorsal coloration of hemelytra dark-brown with light-brown marks; head light-brown; pronotum brown with dark-brown marks; legs brown (Fig. 5A). Dorsal surface coarsely punctate. Ventral coloration of head and thorax light-brown, abdomen with yellowishbrown pubescence.</p> <p>Head. Head length 1.73; maximum width 3.41. Mostly light-brown with dark-brown marks along midline and posteriorly; coarsely punctate. Eyes convergent anteriorly, synthlipsis 1.73; thin band of cuticle along posterolateral margin of eye; eyes not raised above level of vertex or pronotum. Anterior margin between eyes convex, extending anteriorly in front of eyes 10.71% of head length; posterior margin between eyes strongly convex, extending posteriorly 28.57% of head length. Labrum width 2.00× length, evenly rounded. Labium with three visible light-brown segments, darkening distally, extending 0.76 beyond labrum not including extruded stylets. Antennal proportions 5:14:19:9, length 0.94, not reaching lateral margin of eye, elongate hairs on segment 4 and distal half of 3.</p> <p>Thorax. Pronotum coarsely punctate, ground color brown, dark-brown marking medially, dark-brown line behind eye; transverse sulcus marking anterior border of transverse band in posterior 1/3; transverse band brown; lateral margins light-brown, convergent, evenly convex, explanate; posterior margin almost straight; anterior margin deeply concave between eyes to embrace convex posterior margin of head; posterolateral corners rounded; width 2.86× length; length at midline 2.35; maximum width at posterolateral corners 6.75. Prothorax ventrally pruinose throughout, except laterally; apices of propleura meeting at midline, not appressed to prosternellum; propleuron light-brown, medial 2/3 of posterior margin with golden setae. Probasisternum with sharp median carina and row of setae lateral to carina. Prosternellum not covered by apices of propleura. Scutellum coarsely punctate, triangular, brown, two reniform to ovate dark-brown marks medially, width 2.02× length, width 4.52, length 2.23. Hemelytra densely punctate, mostly dark-brown, length 9.20 (chord measurement); corium dark-brown, lightbrown irregularly shaped and checkmark-shaped markings at lateral and posterior margins, respectively. Clavus dark-brown, light-brown at mid-length and apically, length 3.80× width, length 4.71, width 1.24; claval commissure black, length 1.24. Embolium length 3.53, greatest width 1.30; lateral margin convex, yellowish-brown in anterior 2/3, dark-brown posteriorly. Membrane dark-brown (Fig. 5A). Hindwings extending to posterior margin of tergum VI. Mesobasisternum midventral tumescence negligible, with sulcus on midline continuing through triangular mesosternellum. Metasternellum (= metaxyphus) transverse, subtriangular, with median carina.</p> <p>Legs. All legs segments brown. Profemur posterior margin with row of tightly arranged setae in basal 2/3, row of short brown spines along middle third; anterior margin with dense pad of setae without associated spines. Protibia and tarsus with occlusal inner surface flattened; tarsus immovable, one-segmented; pretarsal claw single, minute, triangular. Procoxa with cluster of stout, brown anteromedial spines. Meso- and metacoxae partially recessed into thorax. Meso- and metafemora with row of short, brown spines on anterior margin; spines restricted to basal half on mesofemur, nearly full length of metafemur. Mesotibiae with ventrolateral and dorsolateral rows of stout reddishbrown spines; mesolateral rows intermixed with combs of spines. Metatibia with ventrolateral and dorsolateral rows of stout reddish-brown spines. Meso- and metatibiae with semi-circlet of spines at apex of dorsal and mesal margins; two comb rows of stout spines near apex of ventral margin. Meso- and metatibiae and metatarsus with long, yellow to brown swimming hairs; hairs profuse on metatibia and -tarsus. Meso- and metapretarsi with paired claws slender, gently curved, with small basal tooth. Leg measurements as follows: foreleg, femur 3.10, tibia 2.41, tarsus 0.55; middle leg, femur 2.97, tibia 2.79, tarsomeres 1–3, 0.18, 0.54, 0.66; hind leg, femur 3.90, tibia 4.65, tarsomeres 1–3, 0.31, 1.00, 0.90.</p> <p>Abdomen. Dorsally with lateral margins of III–VIII exposed, IV–VI each dark-brown in anterior 1/3 and yellowish-brown posteriorly; lateral margins of II to basal half of III smooth, distal half of III–VI finely serrate, marginal row of profuse and short yellow setae, group of trichobothria near posterolateral corners. Posterolateral corner of II (visible ventrally) right angled, III–VI acute. Ventrally yellowish-brown to brown, with dense pile of fine hairs. Lateral margin with thin, glabrous band. Glabrous rounded to oval patches clearly visible around spiracles on laterosternites II–VI. Mediosternite VII (subgenital plate) asymmetrical, width 1.36× length; length at midline 1.26; maximum width 1.72; left margin with broadly rounded lobe occupying its entire length; right margin with small apical lobe; posterolateral corners short, pointed, subtriangular, extending posteriorly further than the central lobe; central lobe poorly developed, inconspicuous, shallowly concave medially (Fig. 5B).</p> <p>Macropterous male. Paratypes (n = 1), length 11.88; maximum width 7.75. Coloration, setation, pronotum proportions, posterolateral corners of pronotum, scutellum proportions, embolium length generally same as for holotype. Otherwise hindwings extending to posterior margin of tergum V. Accessory genitalic process of tergum VI gently curved to right close to base, distal 1/3 angled to right to continue perpendicular to body axis (Fig. 5C). Medial lobes of tergum VIII (pseudoparameres) symmetrical, posterolateral corners narrowly rounded, posteromesal corners broadly rounded, posterior margin concave (Fig. 5D). Phallosoma elongate, linear, slender, broadly rounded dorsoapically; left endosomal sclerite reduced, with few small and inconspicuous denticles; right endosomal sclerite vestigial, rounded, without denticles (Fig. 5E). Parameres symmetrical, slightly longer than maximum width, mesal margin rounded, setae emanating from distal half of dorsal surface. Proctiger almost as long as width at base. Pygophore with anterior margin obtuse to subobtuse medially, elongate setae sparsely distributed over most of surface, with thick brush of elongate setae on posterior margin (Fig. 5F).</p> <p>Diagnosis. This species can be distinguished from the other three in this section by the female SGP with a large, plate-like, rounded lobe on the left margin and symmetrical subtriangular posterolateral corners (Fig. 5B). Additionally, the male AGP tapers distally to a pointed and laterally directed apex (Fig. 5C) and the pseudoparamere posterolateral corners are narrowly rounded (Fig. 5D).</p> <p>Comparative notes. Ambrysus morelosensis presents a unique female SGP; none of the other three species in this group exhibits a similar large lobe on the left margin. The only other two species in the complex with a "comparable" feature are A. scalenus La Rivers and A. sitesi Reynoso; nonetheless, the lobe is truncate in A. scalenus and in both species it is located at mid-length, not occupying the entire margin as in the new species. Additionally, these two species present the central lobe almost at the same level as the posterolateral corners, whereas in A. morelosensis n. sp. the central lobe is poorly expressed, almost flat, and clearly below the level of the posterolateral corners. This new species is superficially similar to A. sitesi; this similarity together with the "comparable" female SGP and the similar male pseudoparameres suggest a close relationship.</p> <p>Variation. The single female paratype exhibits the posterior margin of the SGP evenly concave between the blunt posterolateral corners and the small apical lobe on the right margin is absent.</p> <p>Habitat description. The type locality, Río Amacuzac at Huajintlán, is in the southwestern area of the Mexican state of Morelos at an elevation of 931 meters. The first author visited the type locality (L-1989) three decades after the type specimens were collected; unfortunately, no more specimens of A. morelosensis were found, only numerous specimens of A. hydor La Rivers. At the time, the river at the type locality was approximately 40 meters wide and shallow, exposing boulders and cobble (Fig. 6).</p> <p>Distribution. Ambrysus morelosensis is known from only two localities, one in the state of Michoacán and the other in Morelos, in central-western and central Mexico, respectively (Fig. 7). Both localities are at elevations below 1,000 meters and within the limits of the Balsas Basin biogeographical province; more specifically, in the middle (Morelos) and lower (Michoacán) sections of the basin.</p> <p>Etymology. The specific epithet " morelosensis " is in reference to the central Mexican state of Morelos, where the type locality is located. The species name means The Ambrysus from Morelos.</p> <p>Repository. The holotype and paratypes will be deposited in the Colección Entomológica del Instituto de Ecología A.C. (IEXA).</p> <p>Type material examined. HOLOTYPE ♀. MEXICO: MORELOS: [Mpio. Amacuzac, Río Amacuzac at Huajintlán], km 50 [on carr. 95] <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.42788&amp;materialsCitation.latitude=18.609879" title="Search Plazi for locations around (long -99.42788/lat 18.609879)">Cuernavaca-Taxco</a>, [18º36'35.56''N, 99º25'40.38''W, 931 m], 09-III-1985, M. Albores coll. PARATYPES: same data as holotype (1♂ IEXA). MICHOACÁN: Mpio. Buenavista, Buenavista River at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-102.57506&amp;materialsCitation.latitude=19.216057" title="Search Plazi for locations around (long -102.57506/lat 19.216057)">Buenavista Tomatlán</a>, below dam, 19º12'57.8''N, 102º34'30.2''W, 440 m, 24-XII-2012, L-1481, ReynosoVelasco, D. coll. (1♀ IEXA).</p> </div>	https://treatment.plazi.org/id/03D6B32E820CD4203ECAFCEC7764FA22	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Reynoso-Velasco, Daniel;Sites, Robert W.	Reynoso-Velasco, Daniel, Sites, Robert W. (2022): Revision of the Ambrysus signoreti Stål species complex (Heteroptera: Naucoridae Ambrysinae). Section 1. Zootaxa 5214 (3): 421-439, DOI: https://doi.org/10.11646/zootaxa.5214.3.5
03D6B32E8204D4263ECAFB6370BEFD12.text	03D6B32E8204D4263ECAFB6370BEFD12.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Ambrysus schuhi Reynoso-Velasco & Sites 2019	<div><p>Ambrysus schuhi Reynoso &amp; Sites</p> <p>(Figs. 8–9)</p> <p>A. schuhi Reynoso-Velasco &amp; Sites 2019a: Zootaxa 4615 (2): 294–297 (original description).</p> <p>Diagnosis. This species can be distinguished from the other three in this section by the female SGP with a pointed apical lobe on the left margin and asymmetrical posterolateral corners; right corner subtriangular, left corner digitate (Fig. 8B). Additionally, the male AGP tapers distally to a pointed and laterally directed apex (Fig. 8C) and the pseudoparamere posterolateral corners are narrowly rounded (Fig. 8D).</p> <p>Comparative notes. At the time of its description, the female SGP of this species was considered similar to that of A. cosmius. Subsequent examination of specimens of A. variegatus has shown that the SGP of A. schuhi is more similar to that of the latter species. Notwithstanding, A. schuhi exhibits the SGP with the left apical lobe well-developed and subtriangular, posterolateral corners asymmetrical, and central lobe with a shallow concavity; whereas A. variegatus exhibits the apical lobe small and rounded, posterolateral corners symmetrical, and the central lobe with a prominent concavity. The overall dorsal appearance of A. schuhi is closer to that of A. variegatus than to A. cosmius.</p> <p>Although at least three more species in the complex present apical lobes on the female SGP, one on each margin, A. schuhi is the sole species with a single and well-developed apical lobe on the left margin. The apical lobe exhibited by A. variegatus is inconspicuous.</p> <p>Discussion. This recently described species measures 11.68–14.04 mm in length and 7.36–8.48 mm in width. In the original description, Reynoso-Velasco &amp; Sites (2019a) suggested a close relationship of A. schuhi and A. cosmius based on the general morphology of the female SGP and the male endosomal sclerites exhibited by both species. This relationship was strongly supported in the recent molecular analysis of the group (Reynoso-Velasco &amp; Sites 2021). Unfortunately, that study did not include A. variegatus, which could be more closely related to A. schuhi than A. cosmius.</p> <p>Variation. No variation was detected in the diagnostic features.</p> <p>Type locality. Mexico: Oaxaca, Mpio. Sta María Zacatepec, El Rosario, 16º51'34.6''N, 97º58'44.7''W.</p> <p>Repository. Female holotype (Fig. 8A) is housed at the IEXA.</p> <p>Published records: Mexico: Guerrero, Oaxaca (Reynoso-Velasco &amp; Sites 2019a).</p> <p>Distribution. Ambrysus schuhi occurs in southern Mexico, in the states of Guerrero and Oaxaca (Fig. 9). The range includes localities below an elevation of 800 meters on the border of the Pacific Lowlands and Sierra Madre del Sur biogeographic provinces.</p> <p>Type material examined. HOLOTYPE ♀ (by original designation). MEXICO: OAXACA: Mpio. Sta. Maria Zacatepec, km 179 carr. Sta. Maria Zacatepec-Putla, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-97.97908&amp;materialsCitation.latitude=16.859612" title="Search Plazi for locations around (long -97.97908/lat 16.859612)">El Rosario</a>, Pte. El Rosario, 29-May-2012, L-1394 / 361 m, 16º51'34.6''N, 97º58'44.7''W, Reynoso-Velasco coll. PARATYPES: same data as holotype (3♂ IEXA; 6♂, 6♀ UMC); Mpio. Mesones Hidalgo, km 173 carr. Sta. Maria Zacatepec-Putla, Pte. La Junta, 29-May-2012, L-1395 / 396 m, 16º53'59.7''N 97º58'02''W, Reynoso-Velasco coll. (1♂ UMC); Mpio. San Gabriel Mixtepec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-98.014694&amp;materialsCitation.latitude=16.705252" title="Search Plazi for locations around (long -98.014694/lat 16.705252)">Río Rana</a>, km 194 carr. Puerto Escondido-Oaxaca, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-98.014694&amp;materialsCitation.latitude=16.705252" title="Search Plazi for locations around (long -98.014694/lat 16.705252)">San</a> Gabriel Mixtepec, L-1380 / 27-May- 2012, 712 m, 16º06'06.3''N 97º03'52.9''W, Reynoso-Velasco coll. (1♂, 1♀ UMC); same but 3-Apr-2015, L-1906, Reynoso-Velasco, Sites, Shepard, &amp; Barr colls., rocks &amp; gravel (5♂, 1♀ IEXA; 3♂, 1♀ UMC); [Mpio. San Gabriel Mixtepec], <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-98.014694&amp;materialsCitation.latitude=16.705252" title="Search Plazi for locations around (long -98.014694/lat 16.705252)">San</a> Gabriel Mixtepec, 20- V-84, M. García / <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-98.014694&amp;materialsCitation.latitude=16.705252" title="Search Plazi for locations around (long -98.014694/lat 16.705252)">Colección del Instituto de Biología</a>, UNAM. México D.F. (1♂ CNIN; 1♂, 1♀ USNM); Mpio. Sta. Maria Zacatepec, km 189 carr. Sta. Maria Zacatepec-Putla, S of El Tapanco, L-1393 / 29-May- 2012, 341 m, 16º47'28.3''N 97º59'20.4''W, Reynoso-Velasco coll. (2♂ UMC); Mpio. Sta Maria Zacatepec, Km 201 carr. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-98.014694&amp;materialsCitation.latitude=16.705252" title="Search Plazi for locations around (long -98.014694/lat 16.705252)">Mártires de Tacubaya-Santa Maria Zacatepec</a> ca. 13 km NE of San Pedro Amuzgos, L-1391 / 29-May- 2012, 276 m, 16º42'18.9''N 98º00'52.9''W, Reynoso-Velasco coll. (1♂ UMC). GUERRERO: stream tributary to Laguna Tres Palos, about 22 miles from Acapulco on highway to Mexico City, III:22:1951 R.R. &amp; M. Miller (2♂, 1♀ UMMZ).</p> </div>	https://treatment.plazi.org/id/03D6B32E8204D4263ECAFB6370BEFD12	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Reynoso-Velasco, Daniel;Sites, Robert W.	Reynoso-Velasco, Daniel, Sites, Robert W. (2022): Revision of the Ambrysus signoreti Stål species complex (Heteroptera: Naucoridae Ambrysinae). Section 1. Zootaxa 5214 (3): 421-439, DOI: https://doi.org/10.11646/zootaxa.5214.3.5
03D6B32E8206D4393ECAF9257609F9A4.text	03D6B32E8206D4393ECAF9257609F9A4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Ambrysus variegatus Usinger	<div><p>Ambrysus variegatus Usinger</p> <p>(Figs. 10–12)</p> <p>A. variegatus Usinger 1946: Univ. Kans. Sci. Bull., 31: 200–202 (original description).</p> <p>Supplemental description. Female. Mediosternite VII (SGP) asymmetrical; left margin with a small and inconspicuous apical lobe; right margin without lobe; central lobe clearly concave medially, giving the appearance of two lobes; posterolateral corners subtriangular, pointed, extending posteriorly further than central lobe (Fig. 10B).</p> <p>Male. Accessory genitalic process of tergum VI curved to right at approximately 35 degrees close to proximal third, angled again at approximately 90 degrees almost at mid-length to continue perpendicular to body axis (Fig. 10C). Medial lobes of tergum VIII (pseudoparameres) symmetrical, posterolateral and posteromesal corners broadly rounded, posterior margin almost straight (Fig. 10D). Phallosoma elongate, linear, slender, tapering dorsoapically; endosomal sclerites knob-like apically, with conspicuous denticles; right sclerite extending basally further than left sclerite (Fig. 10E). Parameres symmetrical, almost as long as maximum width, mesal margin convex. Proctiger almost as long as width at base. Pygophore with elongate setae sparsely distributed over most of surface, with thick brush of elongate setae on posterior margin (Fig. 10F).</p> <p>Diagnosis. This species can be distinguished from the other three in this section by the female SGP with a rounded and inconspicuous apical lobe on the left margin and symmetrical subtriangular posterolateral corners (Fig. 10B). Additionally, the male AGP widens distally to a broadly rounded and laterally directed apex (Fig. 10C) and the pseudoparamere posterolateral corners are broadly rounded (Fig. 10D).</p> <p>Comparative notes. This species is superficially similar to A. schuhi. The shapes of the SGP of the two species also are comparable, but with notable differences (see Comparative notes for A. schuhi). The male AGP of A. variegatus widens apically, whereas it tapers in A. cosmius and A. schuhi.</p> <p>Discussion. This species measures 11.04–12.80 mm in length and 6.72–7.76 mm in width. Usinger (1946) considered this species to be similar to Ambrysus bergi Montandon (currently in the genus Australambrysus Reynoso &amp; Sites) and A. guttatipennis Stål. In the original description, Usinger mentioned that eight additional specimens from Mexico were similar to his A. variegatus, but smaller and with morphological variation on the head and prothorax when compared with the specimens in the type series (from Costa Rica). Because of that reason, he did not consider the Mexican specimens as representatives of his new species. No further information was provided on the eight Mexican specimens. Based on examination of specimens of Ambrysus in different collections and the extensive collecting through Mexico for this project, we consider this to be a Central American species not likely distributed in Mexico.</p> <p>This species could be more closely related to A. schuhi than to A. cosmius; unfortunately, this concept could not be corroborated in the recent molecular analysis (Reynoso-Velasco &amp; Sites 2021) because the authors were not able to include representatives of A. variegatus.</p> <p>Variation. No variation was detected in the diagnostic features.</p> <p>Type locality. Costa Rica: west of Cartago (4,700 ft).</p> <p>Repository. Male holotype (Fig. 11) is housed at the CAS.</p> <p>Published records: Costa Rica: Cartago, San José (Usinger 1946, La Rivers 1971, Herrera 2013).</p> <p>New records: Costa Rica: Heredia, Puntarenas.</p> <p>Distribution. This species is currently known to occur only in Costa Rica. The recorded localities, all below an elevation of 2,000 meters, are located in the central and northern part of the country (Fig. 12), in theGuatuso-Talamanca and Puntarenas-Chiriquí biogeographical provinces, with most of the records in the latter province. Two of the specimens examined (1♀ SEMC; 1♀ UMC) were collected syntopically with the holotype of A. harmodius La Rivers at Río Virilla.</p> <p>Type material examined. HOLOTYPE ♂ (by original designation). COSTA RICA: W of Cartago, C.A., 10-VI-[19]32, 4700 ft, B.S. Kaiser / HOLOTYPE variegatus Usinger / 12 / California Academy of Sciences Type No. 7168. PARATYPES: same data as holotype (1♀ EMEC). [CARTAGO]: nr. Tajar [Tejar del El Guarco], 10-VI-[19]32, B.S. Kaiser / PARATYPE variegatus Usinger / 11 (1♂ EMEC). [SAN JOSÉ]: nr. Santa María [de] Dota, 23-VI-[19]32, 5000 ft, B.S. Kaiser / PARATYPE variegatus Usinger / Ambrysus variegatus Usinger determined by Ira La Rivers '50 (1♀ SEMC); San José, VI &amp; VII-1931, Heinrich Schmidt / bought from Heinrich Schmidt / 325 / PARATYPE variegatus Usinger (1♀ UMC).</p> <p>Additional material examined. COSTA RICA: Río Virilla, 26-XII-1931, Heinrich Schmidt / purchased from collector / Ambrysus variegatus Usinger determined by <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-84.80821&amp;materialsCitation.latitude=10.308278" title="Search Plazi for locations around (long -84.80821/lat 10.308278)">Ira La Rivers</a> 1948 (1♀ SEMC; 1♀ UMC). [CARTAGO]: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-84.80821&amp;materialsCitation.latitude=10.308278" title="Search Plazi for locations around (long -84.80821/lat 10.308278)">Turrialba</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-84.80821&amp;materialsCitation.latitude=10.308278" title="Search Plazi for locations around (long -84.80821/lat 10.308278)">Río Tuis</a> (800 msnm), 08-IV-1993, R. Novelo coll. (1♀ UMC). HEREDIA: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-84.80821&amp;materialsCitation.latitude=10.308278" title="Search Plazi for locations around (long -84.80821/lat 10.308278)">Río Sarapiqui</a> (margin) just E of Hwy 4 [126], 10º23.22'N, 84º08.20'W, alt. 620', 25-VI-2003, A.E.Z. Short coll. (1♂ UMC). PUNTARENAS: Qda. Máquina at <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-84.80821&amp;materialsCitation.latitude=10.308278" title="Search Plazi for locations around (long -84.80821/lat 10.308278)">Crandall Reserve</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-84.80821&amp;materialsCitation.latitude=10.308278" title="Search Plazi for locations around (long -84.80821/lat 10.308278)">Instituto de Monteverde</a>, 10º18'29.80''N, 84º48'29.56''W, elev. 1400 m, 17-IV2021, R.W. Sites coll., rootmats in current (1♂ UMC). [SAN JOSÉ]: San José, 18-IV- [19]12, C.R. / Mus. Expd. S. Meek coll. / Field Museum Coll. (1♂ FMNH); San José, VI &amp; VII-1931, Heinrich Schmidt / bought from collector (2♂ SEMC); same but / bought from Heinrich Schmidt / Ambrysus variegatus det. R.L. Usinger (1♂ UMC); same but Ambrysus variegatus det. H.E. Hungerford (1♂ UMC).</p> </div>	https://treatment.plazi.org/id/03D6B32E8206D4393ECAF9257609F9A4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Reynoso-Velasco, Daniel;Sites, Robert W.	Reynoso-Velasco, Daniel, Sites, Robert W. (2022): Revision of the Ambrysus signoreti Stål species complex (Heteroptera: Naucoridae Ambrysinae). Section 1. Zootaxa 5214 (3): 421-439, DOI: https://doi.org/10.11646/zootaxa.5214.3.5
