identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
31CA90DC3320585B8D2A2FC947835621.text	31CA90DC3320585B8D2A2FC947835621.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Megabranchiella longusa Phlai-ngam & Tungpairojwong 2022	<div><p>Megabranchiella longusa Phlai-ngam &amp; Tungpairojwong sp. nov.</p><p>Holotype.</p><p>One male larva on slide and SEM stubs (KKU-AIC), Thailand, Chiang Mai, Chom Thong district, Ban Luang, Siribhum waterfall, 18°32'50.02N, 98°30'49.79E, 1,359 m, 11.03.2021, B. Boonsoong and C. Sutthinun leg.</p><p>Paratype.</p><p>One larva in alcohol (ZMKU), same data as holotype.</p><p>Other materials.</p><p>One larva in alcohol (MZL), Thailand, Nan, Bo Kluea district, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=101.170265&amp;materialsCitation.latitude=19.155302" title="Search Plazi for locations around (long 101.170265/lat 19.155302)">Kluea district</a> <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=101.170265&amp;materialsCitation.latitude=19.155302" title="Search Plazi for locations around (long 101.170265/lat 19.155302)">Tai</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=101.170265&amp;materialsCitation.latitude=19.155302" title="Search Plazi for locations around (long 101.170265/lat 19.155302)">Sapan River</a>, 19°09'19.09N, 101°10'12.96E, 995 m, B. Boonsoong and C. Suttinun leg.</p><p>Description.</p><p>Coloration (Fig. 9A-B). Head dorsally brownish, darker brown along frontal suture. Thorax dorsally brown; pronotum with dark brown pattern medially, mesonotum with longitudinally darker brown pattern medially. Abdomen light brown with dark brown pattern; tergites I-VIII brownish, with darker brown marks laterally to posterior margin, tergites II-III with a paired of pale dots medially, tergites IV-VIII with distinct paired of pale, oblique streak, and with a pale, longitudinal pattern medially, tergites IX-X paler than other tergites, with the same pattern as tergites IV-VIII; abdomen ventrally light brown (Fig. 9C). Legs light brown; dorsal, ventral, and apical femur margins dark brown; claws distally dark brown. Caudal filaments brownish.</p><p>Body (Fig. 9). Ventrally flattened (Fig. 9C), body length 3.5 mm, covered with scattered long, hair-like setae.</p><p>Head (Fig. 9B). Lateral view rounded, head width ca. 1.2  × as long as head length.</p><p>Antenna. Ca. 2  × as long as head length (Fig. 9B); scape without process, subequal in width and length, slightly shorter than pedicel, pedicel ca. 2  × as long as width, scape and pedicel almost bare, without scales bases, covered with scattered long, fine setae; flagellum covered with scattered long, fine setae.</p><p>Labrum (Fig. 10A). Broadly rounded; wider than long, width ca. 1.17  × as long as length; dorsal surface with submarginal row composed of one long, point, simple seta medially plus three long, point, simple setae anterolaterally, dorsal surface with scattered simple, hairlike setae; distal margin with anteromedian notch shallow. Ventrally with submarginal row of setae composed of lateral and anterolateral long, feathered setae and medial long, pectinate setae; ventral surface with five short, spine-like setae near lateral and anterolateral margin.</p><p>Right mandible (Fig. 10B). Canine (Fig. 10C) with 4 + 4 apically rounded denticles, largely fused outer and inner incisors; inner margin of inner incisor with small denticulation; prostheca robust (Fig. 10D), apically with small denticles and comb-shaped structure; mola between mola and prostheca smooth, without setae; mola with well-developed denticulation; apex of mola with tuft of spines like setae.</p><p>Left mandible (Fig. 10E). Canine (Fig. 10F) with 4 + 4 apically rounded denticles, largely fused outer and inner incisors; inner margin of inner incisor with small denticulation; prostheca robust, apically with small denticles and comb-shaped structure (Fig. 10G); mola between mola and prostheca smooth, without setae; mola with reduced denticulation, molar area with numerous small, round teeth, apex of mola with tuft of spines like setae.</p><p>Maxilla (Fig. 10H). Short and compact; galea-lacinia (Fig. 10I) with long, robust, simple setae under crown; inner dorsal row of setae with denti-setae; distal denti-seta tooth-like, middle denti-seta (Fig. 10J) slender, bifid and pectinate; proximal denti-seta slender, pectinate; inner ventral row of six robust, simple setae; medially with one seta and four simple setae. Maxillary palp 2-segmented, with scattered small, blunt setae; distal segment with distinct, small tip at apex.</p><p>Labium (Fig. 10K). Short and compact; glossa basally broad, narrower toward apex, slightly shorter than paraglossa; inner margin with medium, pointed, simple setae; apex with four long, robust, pectinate setae. Paraglossa sub-rectangular, broader than glossa, apically curved inward, apical margin with three rows of long, robust, apically pectinate setae (Fig. 10L), ventrally with 2-3 long, spine-like setae near inner margin, with an arch of 4-5 long, simple setae on outer margin. Labial palp 3-segmented, segment I rectangular and broad, covered with scattered fine, setae and several micropores; segment II with small distolateral expansion, with a few scattered, simple setae and a row of setae reduced to two large, blunt, robust, simple setae near distal margin; segment III rounded, covered with long, robust, simple setae.</p><p>Hypopharynx (Fig. 10M). Lingua subequal to superlingua, apically rounded, with apical tuft of fine, short simple setae; superlingua with distal margin rounded, with fine, short simple setae along margin.</p><p>Thorax. Hindwing pads (Fig. 13A). Highly reduced.</p><p>Forelegs (Fig. 12A). Ratio of foreleg segments 0.68: 0.59: 0.25. Femur (Fig. 13B). Length ca. 3  × maximum width. Dorsal margin of femur (Figs 11A, 13C-D) with a row of 18-20 long, robust, apically pointed, laterally pectinated setae; short stout, lanceolate, laterally pectinate setae and scattered fine hair-like setae along dorsal and ventral margins; femora patch present; surface with scattered tiny spines anteromedially (Fig. 13E); dense long, fine, small apically blunt, hair-like setae present; dorsal margin of tibia with a row of long, apically pointed, pectinate setae; several short stout, lanceolate, laterally pectinate setae and scattered short, apically pointed, hair-like setae along dorsal and ventral margins, patella-tibial suture present; tarsus dorsally with a row of fine, simple setae; ventral margin with a row of fine, simple setae; surface covered with scattered fine hair-like setae. Tarsal claw (Fig. 12B) with one row of about 16 denticles increasing in length toward apex, subapical setae absent. Midlegs and hindlegs. As forelegs.</p><p>Abdomen (Fig. 11B). Tergites. Posterior margin smooth, posterior marginal spines extremely reduced to absent (Figs 11C, 12C, 13F), tergal surface with scattered fine, hair-like setae and scattered long translucent scales distally; abdominal sternites without posterior marginal spines, sternal surface with loose scattered, fine, hair-like setae.</p><p>Gills (Fig. 12D). Seven pairs of gills present on abdominal tergites I-VII, slender and elongated; gills I (Fig. 11D) enlarged to covered abdominal sternites II-V, oriented ventrally, relatively elongated shape with length approximately 2.5  × of width, medially part broad, tracheation extending from main trunk and outer margin, gill margin smooth, surface and gill margin without long, fine hair-like setae; gills II-VII oriented dorsolaterally, slightly oval and slender with length approximately 3.3  × of width, gill margin smooth, surface and gill margin covered with scattered long, fine hair-like setae.</p><p>Gonostyli bud (Fig. 11E).  Acentrella -type, three-segmented, segment I very short, 0.3  × of segment II length, segment III relatively short and broad, rounded at apex.</p><p>Paraproct (Fig. 12E). Margin smooth without marginal spines and without prolongation at posterior margin, surface without scale bases, with micropores and fine, stout, simple setae and scattered fine, hair-like setae, and with a patch of notch scales.</p><p>Caudal filaments. Cerci 0.4  × of body length, inner margin of cerci with very thin, long setae; median filament 0.5  × of cerci length, lateral margins with very thin, long setae.</p><p>Winged stage.</p><p>Unknown.</p><p>Etymology.</p><p>The name of the species  “longusa” refers to the outline of abdominal gill I which is elongate- shaped.</p><p>Distribution.</p><p>Northern part of Thailand (Chiang Mai and Nan Provinces) (Fig. 15).</p><p>Ecological notes.</p><p>The larvae were collected in Siribhum waterfall (Fig. 14D) and headwater stream (Sapan River River) (Fig. 14E). The sampling sites were located at high altitudes of 995-1,360 m a.s.l. in forest areas on mountains in the northern part of Thailand. The waterfall was in the upper stream of the Ping River, and the substrate types were dominated by boulders, cobbles, pebbles, gravel, and a sand bottom. The stream was in the Sapan River and located near the resort which can be disturbed by touristic attractions. The larvae were found on the surface and underside of cobbles in fast-flowing water (Fig. 14F).</p></div>	https://treatment.plazi.org/id/31CA90DC3320585B8D2A2FC947835621	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.		Pensoft via Plazi	Phlai-ngam, Sirikamon;Boonsoong, Boonsatien;Gattolliat, Jean-Luc;Tungpairojwong, Nisarat	Phlai-ngam, Sirikamon, Boonsoong, Boonsatien, Gattolliat, Jean-Luc, Tungpairojwong, Nisarat (2022): Megabranchiella gen. nov., a new mayfly genus (Ephemeroptera, Baetidae) from Thailand with description of two new species. ZooKeys 1125: 1-31, DOI: http://dx.doi.org/10.3897/zookeys.1125.90802, URL: http://dx.doi.org/10.3897/zookeys.1125.90802
80761833451F5DAD9DB6C2143A3E4B99.text	80761833451F5DAD9DB6C2143A3E4B99.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Megabranchiella Phlai-ngam & Tungpairojwong 2022	<div><p>Genus  Megabranchiella Phlai-ngam &amp; Tungpairojwong gen. nov.</p><p>Type species.</p><p>Megabranchiella scutulata sp. nov., by present designation.</p><p>Included species.</p><p>Megabranchiella longusa sp. nov.</p><p>Megabranchiella scutulata sp. nov.</p><p>Diagnosis.</p><p>Larva (Figs 1 - 3). Larval body ventrally flattened (Fig. 4). Margins of head capsule relatively densely covered with fine, long setae. Antenna without process on scape, margins of scape and pedicel densely covered with long, fine, simple setae; flagellum short, covered with scattered long, fine, simple setae. Mouthparts relatively compact. Labrum (Fig. 5A) broadly rounded, dorsally with one central seta and a row of setae reduced in number. Mandibles with smooth margin between mola and prostheca, without setae, right and left prostheca comb-shaped. Maxilla (Fig. 5H) with 2-segmented palp, with a small tip at apex. Labium compact (Fig. 5K), glossa and paraglossa covered with stout setae, labial palp 3-segmented, terminal segment rounded. Thorax broad; forewing pad broad, large, divergent; hindwing pad highly reduced. Femur with a regular row of long, stout, setae on dorsal margin, surface covered with scattered tiny spine-like setae anteromedially, ventral femoral patch present. Tibia with long feathered setae on dorsal margin, covered with scattered fine setae and short, pectinate setae. Tarsus without preapical setae, tarsal claw with one row of denticles. Abdominal tergites covered with scattered long, fine setae; posterior margin smooth. Abdominal gills segment I (Fig. 6D) ventrally oriented, enlarge covering abdominal sternites II to V; gill margin smooth without setae. Abdominal gills segment II-VII dorsolaterally oriented, gill margins with densely covered with long fine setae. Gonostily under larval cuticule  Acentrella -type (Fig. 6E). Paraproct surface with notched scales and long setae; distal margin smooth without prolongation. Caudal filaments with swimming setae; median filament reduced to shorter than 0.4  × of cerci length.</p><p>Winged stage.</p><p>Unknown.</p><p>Etymology.</p><p>Megabranchiella is a combination of Mega - in reference to the enlarged, - branchio - in reference to gills and - iella in reference to the genera  Liebebiella and  Acentrella which are most certainly the closely related genera. The "  Megabranchiella " refers to the remarkable enlarged abdominal gill segment I of baetid mayfly. The gender is feminine.</p><p>Description.</p><p>Larva (Figs 1 - 3). Body Relatively short and ventrally flattened (Fig. 4), covered with scattered long, fine setae; head and thorax in lateral view rounded.</p><p>Head. Antenna. ca. 2  × as long as head length; scape, pedicel and flagellum without process, without scale bases and spines, covered with scattered long, fine setae; flagellum covered with scattered long, fine setae in each segment.</p><p>Labrum (Fig. 5A). Broadly rounded; wider than long; dorsal surface with one central seta and a row of setae reduced in number, long scattered simple setae along dorsal margin, scattered simple, hairlike setae; distal margin with anteromedian notch shallow, disterolateral margin with long feathered setae; distomedial margin with a row of small, short, feathered setae.</p><p>Right mandible (Fig. 5B-D). Canine with almost completely fused outer and inner incisors, incisors well developed, apically rounded; prostheca robust, apically with small denticles and comb-shaped structure; edge between mola and prostheca smooth, without setae; molar area with numerous small, apically rounded teeth; apex of mola with tuft of spines like setae.</p><p>Left mandible (Fig. 5E-G). Canine with almost completely fused outer and inner incisors, well developed incisors, apically rounded; prostheca robust, apically with small denticles; margin between mola and prostheca smooth, without setae; molar area with numerous small, round teeth, apex of mola with tuft of thin setae.</p><p>Maxilla (Fig. 5H). Short and compact; galea-lacinia (Fig. 5I) with long, robust, simple setae under crown. Inner dorsal row of setae with three denti-setae, distal denti-seta tooth-like, middle denti-seta slender, bifid and pectinate (Fig. 5J), proximal denti-seta slender, pectinate; innermost denticles with a row of robust, simple setae; medially with one seta and four short to long, simple setae. Short, stocky, 2-segmented maxillary palp, with scattered small setae; distal segment with distinct, small tip.</p><p>Labium (Fig. 5K). Short and compact; glossa basally broad, narrower toward apex, slightly shorter than paraglossa; paraglossa sub-rectangular, broader than glossa, apically curved inward, apical margin with three rows of medium stout setae; labial palp 3-segmented, segment II with small distolateral expansion, segment III rounded, ventral surface covered with scattered setae.</p><p>Hypopharynx (Fig. 5M). Lingua subequal to superlingua, apically rounded, with apical tuft of fine, long, simple setae; superlingua with distal margin slightly incurved, margin covered with fine simple setae.</p><p>Thorax. Forewing pads. Highly developed related to body size; clearly divergent.</p><p>Hindwing pads. Highly reduced.</p><p>Forelegs (Figs 7A, 12A). Dorsal margin of femur with a row of long, simple setae; short, stout, lanceolate, laterally pectinate setae and scattered fine hair-like setae along dorsal and ventral margins; femora patch present; dorsal surface with scattered tiny spine-like setae anteromedially; scattered long translucent scales present; dorsal margin of tibia with a row of long, simple setae; several broad, lanceolate, laterally pectinate setae and scattered hair-like setae along dorsal and ventral margins, patella-tibial suture present; tarsus dorsally with a row of spine-like simple setae, ventral margin bare or with a row of spine-like simple setae, surface covered with scattered fine hair-like setae; tarsal claw with one row of denticles increasing in length toward apex, subapical setae absent. Midlegs and hindlegs. As forelegs.</p><p>Abdomen (Fig. 6B). Tergites. Posterior margin smooth, posterior marginal spines reduced to absent, tergal surface with scattered stout, fine, hair-like setae and scattered long translucent scales distally. Gonosyli under larval cuticule  Acentrella -type (Fig. 6E).</p><p>Gills. Seven pairs of gills present on abdominal tergites I-VII; gills I enlarged to covered abdominal sternites II-V, oriented ventrally (Fig. 6D), gill margin smooth, without fine hair-like setae; gills II-VII slightly oval, oriented dorsolaterally, gills margin smooth with scattered, long, fine hair-like setae.</p><p>Paraproct (Fig. 7E). Margin smooth without marginal spines and without prolongation at posterior margin.</p><p>Caudal filaments. Inner margin of cerci with very thin, long setae; median filament reduced shorter than 0.4  × of cerci length, lateral margins with very thin, long setae.</p><p>Winged stage.</p><p>Unknown.</p></div>	https://treatment.plazi.org/id/80761833451F5DAD9DB6C2143A3E4B99	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.		Pensoft via Plazi	Phlai-ngam, Sirikamon;Boonsoong, Boonsatien;Gattolliat, Jean-Luc;Tungpairojwong, Nisarat	Phlai-ngam, Sirikamon, Boonsoong, Boonsatien, Gattolliat, Jean-Luc, Tungpairojwong, Nisarat (2022): Megabranchiella gen. nov., a new mayfly genus (Ephemeroptera, Baetidae) from Thailand with description of two new species. ZooKeys 1125: 1-31, DOI: http://dx.doi.org/10.3897/zookeys.1125.90802, URL: http://dx.doi.org/10.3897/zookeys.1125.90802
6C4ABD259911546D9273936C7A550A6C.text	6C4ABD259911546D9273936C7A550A6C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Megabranchiella scutulata Phlai-ngam & Tungpairojwong 2022	<div><p>Megabranchiella scutulata Phlai-ngam &amp; Tungpairojwong sp. nov.</p><p>Materials examined.</p><p>Holotype. Thailand, One male larva on slide (KKU-AIC), Chiang Mai, Mae On district, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=99.32245&amp;materialsCitation.latitude=18.867125" title="Search Plazi for locations around (long 99.32245/lat 18.867125)">Mae Kampong</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=99.32245&amp;materialsCitation.latitude=18.867125" title="Search Plazi for locations around (long 99.32245/lat 18.867125)">The Royal Project of Teen Tok</a>, 18°52'01.65N, 99°19'20.83E, 779 m, 21.12.2020, S. Phlai-ngam leg.</p><p>Paratypes. One larva on slide (KKU-AIC), same data as holotype;  21 larvae in alcohol, same data as holotype;  Four larvae in alcohol (MZL), same data as holotype .</p><p>Other materials.</p><p>Two larvae in alcohol (ZMKU), Thailand, Chiang Rai, Muang district, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=99.80402&amp;materialsCitation.latitude=20.011" title="Search Plazi for locations around (long 99.80402/lat 20.011)">Pong Phra Baht</a> waterfall, 20°00'39.60N, 99°48'14.47E, 476 m, B. Boonsoong and C. Sutthinun leg.</p><p>Description.</p><p>Coloration (Figs 1 - 2). Head dorsally yellow to brownish, with a darker brown pattern between ocelli. Thorax dorsally brown; pronotum with dark brown pattern laterodorsally, mesonotum with longitudinally dark brown pattern medially. Abdomen dorsally brownish; tergite I light brown; tergites I-VIII brown with reddish brown pattern posterolaterally, tergites IV and V slightly lighter; tergites IX and X light brown with or without pale markings. Head and thorax ventrally light brown to yellow; abdomen ventrally light brown; sternites I-V light brown; sternites V-X medium to dark brown (Fig. 3). Legs light brown; dorsal, ventral, and apical femur margins dark brown; claws distally dark brown. Caudal filaments brownish.</p><p>Body (Fig. 4). Relatively short and ventrally flattened (Fig. 4B), body length 3.6 mm, covered with scattered long, hair-like setae.</p><p>Head (Fig. 4B). Lateral view rounded, head width ca. 1.5  × as long as head length.</p><p>Antenna. ca. 2  × as long as head length (Fig. 4B); scape without process, subequal in width and length, pedicel length, ca. 2  × as long as width, scape and pedicel almost bare, without scales bases and spines, covered with scattered long fine setae; flagellum covered with scattered long fine setae in each segment.</p><p>Labrum (Fig. 5A). Broadly rounded; wider than long, width ca. 1.75  × as long as length; dorsal surface with submarginal row composed of one long, point, simple seta medially plus three medium, simple setae anterolaterally, dorsal surface with scattered simple, hairlike setae; distal margin with shallow anteromedian notch. Ventrally with submarginal row of setae composed of lateral and anterolateral long, feathered setae and medial long, pectinate setae; ventral surface with six short, spine-like setae near lateral and anterolateral margin.</p><p>Right mandible (Fig. 5B). Canine with 4 + 4 apically rounded denticles (Fig. 5C), largely fused outer and inner incisors, inner margin of inner incisor with small denticulation; prostheca robust (Fig. 5D), apically with small denticles and comb-shaped structure; margin between mola and prostheca smooth, without setae; mola with well-developed denticulation; apex of mola with tuft of spines like setae.</p><p>Left mandible (Fig. 5E). Canine with 4 + 3 apically rounded denticles (Fig. 5F), largely fused outer and inner incisors, outer and inner incisors separated by a small, rounded tooth; prostheca robust (Fig. 5G), apically with small denticles and comb-shaped structure; margin between mola and prostheca smooth, without setae; mola with reduced denticulation, apex of mola with tuft of spines like setae.</p><p>Maxilla (Fig. 5H). Short and compact; galea-lacinia (Fig. 5I) with long, robust, simple seta under crown; inner dorsal row of setae with three denti-setae, distal denti-seta tooth-like, middle denti-seta slender, bifid and pectinate (Fig. 5J); proximal denti-seta slender, pectinate; inner ventral row of seven robust, simple setae; medially with one seta and four short to long, simple setae. Maxillary palp 2-segmented, with scattered small, blunt setae; distal segment with distinct, small tip at apex.</p><p>Labium (Fig. 5K). Glossa basally broad, narrower toward apex, slightly shorter than paraglossa; inner margin with medium, pointed, simple setae; apex with four long, robust, pectinate setae; basal area with fine scattered setae. Paraglossa sub-rectangular, broader than glossa, apically curved inward, apical margin with three rows of long, robust, apically pectinate setae (Fig. 5L), ventrally with 4-5 long, spine-like setae near inner margin, with an arch of 4-5 long, simple setae on outer margin; basal area with a single medium seta. Labial palp 3-segmented, segment I rectangular and broad, covered with scattered fine, setae and several micropores; segment II with small distolateral expansion, with a few scattered, simple setae and row of setae reduced to two large, blunt, robust, simple setae near distal margin; segment III rounded, covered with long, robust, simple setae.</p><p>Hypopharynx (Fig. 5M). Lingua subequal to superlingua, apically rounded, with apical tuft of fine, simple setae; superlingua with distal margin slightly incurved, margin covered with fine simple setae.</p><p>Thorax. Hindwing pads (Fig. 8A). Highly reduced.</p><p>Forelegs (Fig. 7A). Ratio of foreleg segments 0.58: 0.48: 0.22. Femur. Length ca. 2.5  × maximum width. Dorsal margin of femur (Figs 6A, 8B-C) with a row of 11-13 long, robust, apically rounded, simple setae; short stout, lanceolate, laterally pectinate setae and scattered fine hair-like setae along dorsal and ventral margins (Fig. 8D); femora patch present; surface with scattered tiny spines anteromedially (Fig. 8E); scattered long translucent scales present; dorsal margin of tibia with a row of long, simple setae; several short stout, lanceolate, laterally pectinate setae and scattered hair-like setae along dorsal and ventral margins, patella-tibial suture present; tarsus dorsally with a row of fine, spine-like, simple setae, ventral margin bare or with a row of fine, spine-like, simple setae, surface covered with scattered fine hair-like setae; tarsal claw (Fig. 7B) with one row of about 12 denticles increasing in length toward apex, subapical setae absent. Midlegs and hindlegs. As forelegs.</p><p>Abdomen (Fig. 6B). Tergites. Posterior margin smooth, posterior marginal spines extremely reduced to absent, tergal surface with scattered stout, fine, hair-like setae and scattered long translucent scales distally (Figs 6C, 7C, 8F); abdominal sternites without posterior marginal spines; sternal surface with loose scattered fine, hair-like setae.</p><p>Gills (Fig. 7D). Seven pairs of gills present on abdominal tergites I-VII; gills I (Fig. 6D) enlarged to covered abdominal sternites II-V, ventrally oriented, relatively rhombus shape, length approximately 1.4  × of width, medially part broad, tracheation extending from main trunk to outer margin, gill margin smooth, surface and gill margin without long, fine hair-like setae; gills II-VII oriented dorsolaterally, slightly oval length approximately 2.1  × of width, gill margin smooth, surface and gill margin covered with scattered long, fine hair-like setae.</p><p>Gonostyli bud (Fig. 6E).  Acentrella -type, three-segmented, segment I very short, 0.3  × of segment II length, segment III relatively short and broad, rounded at apex.</p><p>Paraproct (Fig. 7E). Margin smooth without marginal spines and without prolongation at posterior margin. Surface without scale bases, with micropores and fine, stout, simple setae and scattered fine, hair-like setae, and with a patch of notch scales.</p><p>Caudal filaments. Cerci 0.4  × of body length, inner margin of cerci with very thin, long setae; median filament 0.5  × of cerci length, lateral margins with very thin, long setae.</p><p>Winged stages.</p><p>Unknown</p><p>Etymology.</p><p>The name of the species  “scutula” refers to the outline of abdominal gill I which is rhombus- shaped.</p><p>Distribution.</p><p>Northern part of Thailand (Chiang Mai and Chiang Rai Provinces) (Fig. 15).</p><p>Ecological notes.</p><p>The larvae were collected in headwater stream (Mae Kampong River) (Fig. 14A) and Pong Phra Baht waterfall (Fig. 14B). The sampling sites were located with altitudes of 475-780 m a.s.l. Both stream and waterfall were situated in forest areas with relatively complete canopy cover on mountains in the northern part of Thailand. The stream was in The Royal Project of Teen Tok area which has some human disturbances resulting from touristic attractions and resorts. The substrates were dominated by 50% cobbles, 20% pebble, 20% boulders, 10% gravels respectively with sand bottom. The waterfall was located upstream. The larvae were found on the surface of cobbles in fast-flowing water (Fig. 14C).</p></div>	https://treatment.plazi.org/id/6C4ABD259911546D9273936C7A550A6C	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.		Pensoft via Plazi	Phlai-ngam, Sirikamon;Boonsoong, Boonsatien;Gattolliat, Jean-Luc;Tungpairojwong, Nisarat	Phlai-ngam, Sirikamon, Boonsoong, Boonsatien, Gattolliat, Jean-Luc, Tungpairojwong, Nisarat (2022): Megabranchiella gen. nov., a new mayfly genus (Ephemeroptera, Baetidae) from Thailand with description of two new species. ZooKeys 1125: 1-31, DOI: http://dx.doi.org/10.3897/zookeys.1125.90802, URL: http://dx.doi.org/10.3897/zookeys.1125.90802
