identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
F74A2513FFF5F104FDEA2AABFE4305C6.text	F74A2513FFF5F104FDEA2AABFE4305C6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Gurumon Pati 2022	<div><p>Genus Gurumon gen. nov.</p> <p>urn:lsid:zoobank.org:act: BCA0A03D-DC25-440D-B62E-51F2D7AA753C</p> <p>Figs 1–4</p> <p>Type species</p> <p>Gurumon gurumayum sp. nov., by present designation; gender neuter.</p> <p>Diagnosis</p> <p>Small adult size (adult CW &lt;15 mm). Carapace transversely ovate; dorsal surface generally smooth, glabrous, conspicuously arched; epigastric cristae low, visible as 2 broad protuberances; postorbital cristae indiscernible; external orbital angle indistinct, low; epibranchial tooth very low; cervical grooves barely visible (Figs 1A–B, 2A, E, H, 3A). Epistome posterior margin with well-developed, triangular medial tooth (Fig. 1B). Antennules short, folded in longitudinally broad fossae; antennae vestigial (Fig. 1B). Mandibular palp 3 segmented; terminal segment simple, undivided (Fig. 2B). First, second maxillipeds each with short flagellum on exopod; third maxilliped exopod relatively stout, tapered, reaching beyond anterolateral angle of ischium, completely lacking flagellum (Figs 1B–C, 3B). Chelipeds smooth, glabrous (Figs 1A, C, 2A, E, H). Ambulatory legs glabrous, slender; merus (P2–P5) elongated (Figs 1A, C, 2A, E, H). Male s2/s3 deep, reaching lateral margins; s3/s4 indiscernible; s7/s8 lacking transverse ridge (Figs 1C, 2C–D, 3C). Male pleon broad, with distinctly broader pleonal somite 6 (Figs 1C, 3C–D). Male telson tongue-shaped, with concave lateral margins (Figs 1C, 3C–D). G1 stout, long; flexible zone small; terminal segment stout, cylindrical, long, ca 0.6 × combined length of flexible zone and subterminal segment, curved outwards, dorsal flap absent; subterminal segment stout (Figs 2C, 3E, 4A–B). G2 longer than G1; distal segment long, ca 0.4 × as long as basal segment (Figs 2C, 3F, 4C). Vulvae on S6 located apart from each other (VD/SW = ca 0.25), open mesially, subovate, large (Fig. 2G).</p> <p>Etymology</p> <p>The genus is named in the honour of Dr Shantabala Devi Gurumayum for her extensive work in aquatic biology, in arbitrary combination with the genus name Potamon Savigny, 1816. The gender of the generic name is neuter.</p> </div>	https://treatment.plazi.org/id/F74A2513FFF5F104FDEA2AABFE4305C6	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.		Plazi	Pati, Sameer K.	Pati, Sameer K. (2022): Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. European Journal of Taxonomy 847: 28-45, DOI: https://doi.org/10.5852/ejt.2022.847.1979, URL: http://dx.doi.org/10.5852/ejt.2022.847.1979
F74A2513FFF2F103FD982859FE7F0082.text	F74A2513FFF2F103FD982859FE7F0082.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Abormon capillosum Mitra, Pati & Ng 2021	<div><p>Abormon capillosum Mitra, Pati &amp; Ng, 2021</p> <p>Material examined</p> <p>Holotype INDIA – Arunachal Pradesh State • ♂, CW 10.2 mm, CL 8.5 mm; Upper Siang District: Tulung Village, near Tutting, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=94.897&amp;materialsCitation.latitude=29.006" title="Search Plazi for locations around (long 94.897/lat 29.006)">Abor Hills</a>; 29.006° N, 94.897° E; alt. 1240 m; 5 Nov. 2019; S. Mitra leg.; ZSIK C.8610/2.</p> <p>Paratype INDIA – Arunachal Pradesh State • 1 ♀, CW 14.5 mm, CL 11.8 mm; same collection data as for holotype; ZSIK C.8612/2.</p> </div>	https://treatment.plazi.org/id/F74A2513FFF2F103FD982859FE7F0082	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.		Plazi	Pati, Sameer K.	Pati, Sameer K. (2022): Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. European Journal of Taxonomy 847: 28-45, DOI: https://doi.org/10.5852/ejt.2022.847.1979, URL: http://dx.doi.org/10.5852/ejt.2022.847.1979
F74A2513FFF2F103FD9F2BC6FD3A0642.text	F74A2513FFF2F103FD9F2BC6FD3A0642.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Abormon praecalvum Mitra, Pati & Ng 2021	<div><p>Abormon praecalvum Mitra, Pati &amp; Ng, 2021</p> <p>Material examined</p> <p>Holotype INDIA – Arunachal Pradesh State • ♂, CW 12.9 mm, CL 10.5 mm; Upper Siang District: Dambung Stream, approximately 1.7 km from Hawa Camp, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=94.969&amp;materialsCitation.latitude=28.686" title="Search Plazi for locations around (long 94.969/lat 28.686)">Mouling National Park</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=94.969&amp;materialsCitation.latitude=28.686" title="Search Plazi for locations around (long 94.969/lat 28.686)">Abor Hills</a>; 28.686° N, 94.969° E; alt. 406 m; 28 Oct. 2017; G. Maheswaran et al. leg.; ZSI-WRC C.1941.</p> <p>Paratype INDIA – Arunachal Pradesh State • 1 ♀, CW 14.5 mm, CL 11.5 mm; Upper Siang District: Ramsing Guest House, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=94.976&amp;materialsCitation.latitude=28.656" title="Search Plazi for locations around (long 94.976/lat 28.656)">Mouling National Park</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=94.976&amp;materialsCitation.latitude=28.656" title="Search Plazi for locations around (long 94.976/lat 28.656)">Abor Hills</a>; 28.656° N, 94.976° E; alt. 601 m; 26 Oct. 2017; G. Maheswaran et al. leg.; ZSI-WRC C.1942.</p> </div>	https://treatment.plazi.org/id/F74A2513FFF2F103FD9F2BC6FD3A0642	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.		Plazi	Pati, Sameer K.	Pati, Sameer K. (2022): Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. European Journal of Taxonomy 847: 28-45, DOI: https://doi.org/10.5852/ejt.2022.847.1979, URL: http://dx.doi.org/10.5852/ejt.2022.847.1979
F74A2513FFF2F103FE4D2D87FA82074C.text	F74A2513FFF2F103FE4D2D87FA82074C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pararanguna hemicyclia Naruse, Chia & Zhou 2018	<div><p>Pararanguna hemicyclia Naruse, Chia &amp; Zhou, 2018</p> <p>Material examined</p> <p>Paratype CHINA – Yunnan Province • 1 ♂, CW 14.0 mm, CL 11.9 mm; Fengqing County: Dashan Village, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=99.78&amp;materialsCitation.latitude=24.466" title="Search Plazi for locations around (long 99.78/lat 24.466)">Xueshan Town</a>; [24.466° N, 99.780° E]; 1 Feb. 2004; Yang Zheng Bing leg.; ZRC 2013.0559.</p> </div>	https://treatment.plazi.org/id/F74A2513FFF2F103FE4D2D87FA82074C	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.		Plazi	Pati, Sameer K.	Pati, Sameer K. (2022): Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. European Journal of Taxonomy 847: 28-45, DOI: https://doi.org/10.5852/ejt.2022.847.1979, URL: http://dx.doi.org/10.5852/ejt.2022.847.1979
F74A2513FFF2F103FD912C75FC5304D3.text	F74A2513FFF2F103FD912C75FC5304D3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pararanguna semilunata (Dai & Chen 1985)	<div><p>Pararanguna semilunata (Dai &amp; Chen, 1985)</p> <p>Material examined</p> <p>Holotype CHINA – Yunnan Province • ♂; Xi Yi Village, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=99.323&amp;materialsCitation.latitude=24.928" title="Search Plazi for locations around (long 99.323/lat 24.928)">Baoshan</a>; [24.928° N, 99.323° E]; 13 Oct. 1981; A.Y. Dai and G.X. Chen leg.; IZCAS CB05191.</p> <p>Paratypes CHINA – Yunnan Province • 1 ♀; same collection data as for holotype; IZCAS CB05191 • 1 ♂, CW 21.8 mm, CL 17.3 mm; same collection data as for holotype; ZRC 2020.0085 • 1 ♀, CW 20.2 mm, CL 16.6 mm; same collection data as for holotype; ZRC 2020.0085.</p> </div>	https://treatment.plazi.org/id/F74A2513FFF2F103FD912C75FC5304D3	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.		Plazi	Pati, Sameer K.	Pati, Sameer K. (2022): Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. European Journal of Taxonomy 847: 28-45, DOI: https://doi.org/10.5852/ejt.2022.847.1979, URL: http://dx.doi.org/10.5852/ejt.2022.847.1979
F74A2513FFF2F10CFDA32E11FC7604EA.text	F74A2513FFF2F10CFDA32E11FC7604EA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Potamiscus annandali (Alcock 1909)	<div><p>Potamiscus annandali (Alcock, 1909)</p> <p>Material examined</p> <p>Lectotype INDIA – Assam State • ♂, CW 33.0 mm, CL 25.0 mm; Cachar District: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=92.948&amp;materialsCitation.latitude=25.029" title="Search Plazi for locations around (long 92.948/lat 25.029)">Nemotha</a>; [25.029° N, 92.948° E]; J. Wood-Mason leg.; ZSIK 6602-3/9.</p> <p>Remarks</p> <p>Gurumon gen. nov. certainely belongs to Potamiscinae (sensu Yeo &amp; Ng 2004) because the transverse ridge on s7/s8 is absent (Fig. 2C–D). The medial portion of the s8, however, is conspicuously narrow so that the longitudinal medial groove is indiscernible (Fig. 2C–D). The indistinct, low external orbital angle (Figs 1A, 2A, E, H, 3A), the relatively stouter exopod of the third maxilliped (Figs 1C, 3B), and the relatively broader male pleonal somite 6 (proximal width ca 3 × the medial length) (Figs 1C, 3C–D) are characteristic to Gurumon gen. nov. by which it can be distinguished from the morphologically related Potamiscus loshingensis, Potamiscus rongjingensis, Abormon, and Pararanguna. The external orbital angle is distinct and triangular, the exopod of the third maxilliped is relatively slenderer, and the male pleonal somite 6 is relatively narrower (proximal width ca 2.0–2.5 × the medial length) in Potamiscus loshingensis, Potamiscus rongjingensis, Abormon, and Pararanguna (see Wu 1934: fig. 1; Dai et al. 1990: pl. 1 fig. 2, fig. 2 (1, 8); Dai 1999: pl. 25 fig. 1, fig. 200 (1–2); Naruse et al. 2018: figs 20a, 21; Mitra et al. 2021: figs 2a–b, e, 6a–b, e).</p> <p>In carapace morphology, Gurumon gen. nov. most resembles Abormon in that both genera have a transversely ovate carapace, the low epigastric cristae, the indiscernible postorbital cristae, a very low epibranchial tooth, barely visible cervical grooves, the deep s2/s3, a broad male pleon, and a tongueshaped male telson with the lateral margins concave (Figs 1A–C, 2A, C, E, H, 3A, C–D; see Mitra et al. 2021: figs 1a–c, 2a, d–e, 4a, 5a–c, 6a, d–e, 8a). In addition to the character states of the external orbital angle, third maxilliped exopod and male pleonal somite 6, Gurumon gen. nov. can be separated from Abormon by the relatively small flexible zone of the G1 (Figs 3E, 4A) (vs G1 flexible zone relatively large; see Mitra et al. 2021: figs 3a–b, 7a–b), the cylindrical G1 terminal segment with the dorsal flap absent (Figs 3E, 4A–B) (vs G1 terminal segment conical with the dorsal flap distinct but low; see Mitra et al. 2021: figs 3a–c, 7a–c), and the mesially open, subovate and relatively large vulvae (Fig. 2G) (vs vulvae anteriorly open, transversely ovate and relatively small; see Mitra et al. 2021: figs 4c, 8c). Although both genera are known from the mountains of the Arunachal Pradesh State (Fig. 5), Gurumon gen. nov. seems to be restricted to the elevated areas (2473–2513 m altitude), while Abormon dwells at relatively lower altitude (406–1240 m) (Mitra et al. 2021).</p> <p>In G1 structure, Gurumon gen. nov. is quite similar to Potamiscus loshingensis and P. rongjingensis because all possess a stout G1 with the terminal segment being cylindrical, relatively long (ca 0.5–0.6 × the combined length of the flexible zone and the subterminal segment) and lacking a dorsal flap (Figs 3E, 4A–B; see Wu 1934: fig. 1; Dai et al. 1990: fig. 2(5); Dai 1999: figs 103 (5–6), 105 (4–5)). Despite their similar G1s, Gurumon gen. nov. differs from Potamiscus loshingensis and P. rongjingensis by the relatively small flexible zone of the G1 (Figs 3E, 4A) (vs G1 flexible zone relatively large; see Dai et al. 1990: fig. 2(5); Dai 1999: fig. 103 (5–6)), and the relatively less stout G1 terminal segment (Figs 3E, 4A, B) (vs G1 terminal segment relatively stouter; see Wu 1934: fig. 1; Dai et al. 1990: fig. 2(5); Dai 1999: figs 103 (5–6), 105 (4–5)). Other features of carapace, including those of the external orbital angle, third maxilliped exopod and male pleonal somite 6, however, confirm their separation. For instance, the epigastric cristae are low in Gurumon gen. nov. (Figs 1A, 2A, E, H, 3A) (vs epigastric cristae well-developed in Potamiscus loshingensis and P. rongjingensis; see Wu 1934: fig. 1; Dai et al. 1990: pl. 1 fig. 2); the postorbital cristae are indiscernible in Gurumon gen. nov. (Figs 1A, 2A, E, H, 3A) (vs postorbital cristae relatively distinct in Potamiscus loshingensis and P. rongjingensis; see Wu 1934: fig. 1; Dai et al. 1990: pl. 1 fig. 2); the external orbital angle is indistinct, low in Gurumon gen. nov. (Figs 1A, 2A, E, H, 3A) (vs external orbital angle distinct, triangular in Potamiscus loshingensis and P. rongjingensis; see Wu 1934: fig. 1; Dai et al. 1990: pl. 1 fig. 2); the epibranchial tooth is very low in Gurumon gen. nov. (Figs 1A, 2A, E, H, 3A) (vs epibranchial tooth relatively distinct in Potamiscus loshingensis and P. rongjingensis; see Wu 1934: fig. 1; Dai et al. 1990: pl. 1 fig. 2); the exopod of the third maxilliped is relatively stouter in Gurumon gen. nov. (Figs 1C, 3B) (vs third maxilliped exopod relatively slenderer in Potamiscus loshingensis and P. rongjingensis; see Wu 1934: fig. 1; Dai et al. 1990: fig. 2 (1)); and the male pleon is relatively stouter, with the pleonal somite 6 broad, proximal width ca 3 × the medial length in Gurumon gen. nov. (Figs 1C, 3C–D) (vs male pleon relatively slenderer, with the pleonal somite 6 narrow, proximal width ca 2.0–2.1 × the medial length in Potamiscus loshingensis and P. rongjingensis; see Wu 1934: fig. 1; Dai et al. 1990: fig. 2 (8)). While the structure of the vulvae is not known in Potamiscus rongjingensis, P. loshingensis possesses the transversely ovate vulvae, which are close to each other (VD/SW = ca 0.1) (see Dai 1999: fig. 103 (9)) against the subovate and relatively widely located vulvae (VD/SW = ca 0.25) of Gurumon gen. nov. (Fig. 2G). Gurumon gen. nov. is found in the Arunachal Pradesh State of northeastern India, while Potamiscus loshingensis and P. rongjingensis are known only from Guangxi and/or Sichuan provinces of China (Wu 1934; Dai et al. 1990; Dai 1999) (Fig. 5). The disjunct geographical distributions with several mountain barriers further corroborate their separation.</p> <p>Gurumon gen. nov. need not to be confused with Potamiscus s. str. (represented by the type species) because the new genus possesses the following characters in contrast to those of Potamiscus s. str.: the low epigastric cristae (Figs 1A, 2A, E, H, 3A) (vs epigastric cristae well-developed; see Yeo &amp; Ng 2007: fig. 11a); the indiscernible postorbital cristae (Figs 1A, 2A, E, H, 3A) (vs postorbital cristae distinct, reaching each epibranchial tooth; see Yeo &amp; Ng 2007: fig. 11a); the indistinct, low external orbital angle (Figs 1A, 2A, E, H, 3A) (vs external orbital angle distinct, triangular; see Yeo &amp; Ng 2007: fig. 11a); the very low epibranchial tooth (Figs 1A, 2A, E, H, 3A) (vs epibranchial tooth distinct; see Yeo &amp; Ng 2007: fig. 11a); the relatively stouter exopod of the third maxilliped (Figs 1C, 3B) (vs third maxilliped exopod relatively slenderer; see Alcock 1910: pl. III fig. 10b); the relatively stouter male pleon, with a relatively broad pleonal somite 6, proximal width ca 3 × the medial length (Figs 1C, 3C–D) (vs male pleon relatively slenderer, with a relatively narrow pleonal somite 6, proximal width ca 2.5 × the medial length; see Bott 1970: pl. 46 fig. 26); the tongue-shaped male telson, with the lateral margins concave (Figs 1C, 3C–D) (vs male telson triangular, with the straight lateral margins; see Bott 1970: pl. 46 fig. 26); and the relatively stouter and longer G1 (tip reaching up to s4/s 5 in situ), with a cylindrical, less strongly curved and long terminal segment, measuring ca 0.6 × the combined length of the flexible zone and the subterminal segment (Figs 2C, 3E, 4A–B) (vs G1 relatively slenderer and shorter (tip reaching slightly beyond s5/s6 up to the proximal third of s 5 in situ), with a conical, strongly bent and short terminal segment, ca 0.2 × the combined length of the flexible zone and the subterminal segment; see Bott 1970: pl. 38 fig. 28; unpublished data). Moreover, Potamiscus s. str. was originated from the hills of lower Assam (Alcock 1909), which is some 460 km away from the known range of Gurumon gen. nov. (Fig. 5).</p> <p>As mentioned earlier, Gurumon gen. nov. is immediately distinguished from Pararanguna by the shapes of external orbital angle, third maxilliped exopod and male pleonal somite 6. The additional differences include the very low epibranchial tooth (Figs 1A, 2A, E, H, 3A), the distinctly concave lateral margins of the male telson (Figs 1C, 3C–D), the relatively small flexible zone of the G1 (Figs 3E, 4A), and the cylindrical G1 terminal segment that lacks a dorsal flap (Figs 3E, 4A–B) in Gurumon gen. nov. against the distinct epibranchial tooth (see Dai 1999: pl. 25 fig. 1; Naruse et al. 2018: fig. 20a), the almost straight lateral margins of the male telson (see Dai 1999: fig. 200 (2); Naruse et al. 2018: fig. 21), the relatively large flexible zone of the G1 (see Dai 1999: fig. 200 (5); Naruse et al. 2018: fig. 22b), and the conical G1 terminal segment with a distinct dorsal flap (see Dai 1999: fig. 200 (4–5); Naruse et al. 2018: fig. 22a–b) in Pararanguna. Pararanguna is known only from the Yunnan Province of southwestern China (Dai 1999; Naruse et al. 2018) (Fig. 5). The elevated mountains with deep valleys between Yunnan and Arunachal Pradesh justify the separation of Gurumon gen. nov. from Pararanguna.</p> <p>Geographical distribution</p> <p>Gurumon gen. nov. is currently known only from the Mehao Wildlife Sanctuary in the Lower Dibang Valley District of Arunachal Pradesh State, northeastern India (Fig. 5).</p> </div>	https://treatment.plazi.org/id/F74A2513FFF2F10CFDA32E11FC7604EA	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.		Plazi	Pati, Sameer K.	Pati, Sameer K. (2022): Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. European Journal of Taxonomy 847: 28-45, DOI: https://doi.org/10.5852/ejt.2022.847.1979, URL: http://dx.doi.org/10.5852/ejt.2022.847.1979
F74A2513FFFDF108FDC82E2EFE9200F2.text	F74A2513FFFDF108FDC82E2EFE9200F2.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Gurumon gurumayum Pati 2022	<div><p>Gurumon gurumayum sp. nov.</p> <p>urn:lsid:zoobank.org:act: 766FC0A2-3E63-4089-9949-CD72800E492F</p> <p>Figs 1–4, 6</p> <p>Diagnosis</p> <p>As for new genus.</p> <p>Etymology</p> <p>The species epithet is the family name of Dr Shantabala Devi Gurumayum, an Indian zoologist who kindly collected and provided the crab specimens for the present study. The species name is treated here as a Latin noun in apposition.</p> <p>Material examined</p> <p>Holotype INDIA – Arunachal Pradesh State • ♂, adult, CW 10.9 mm, CL 8.8 mm, CH 4.7 mm, FW 3.9 mm; Lower Dibang Valley District: Mayodia, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=95.909&amp;materialsCitation.latitude=28.233" title="Search Plazi for locations around (long 95.909/lat 28.233)">Mehao Wildlife Sanctuary</a>; 28.233° N, 95.909° E; alt. 2473 m; 17 Oct. 2015; S.D. Gurumayum leg.; ZSI-WRC C.2170.</p> <p>Paratypes INDIA – Arunachal Pradesh State • 1 ♂, adult, CW 13.3 mm, CL 9.9 mm, CH 5.6 mm, FW 4.6 mm; same collection data as for holotype; ZSI-WRC C.2171 • 1 ♀, adult, CW 12.7 mm, CL 10.0 mm, CH 5.9 mm, FW 4.4 mm; same collection data as for preceding; ZSI-WRC C.2171 • 1 ♀, adult, CW 13.1 mm, CL 9.9 mm, CH 5.6 mm, FW 4.2 mm; same collection data as for preceding; ZSI-WRC C.2172 • 1 ♀, adult, CW 12.6 mm, CL 9.5 mm, CH 5.7 mm, FW 4.0 mm; same collection data as for preceding; ZSI- WRC C.2172.</p> <p>Additional material</p> <p>INDIA – Arunachal Pradesh State • 3 ♂♂, 4 ♀♀; Lower Dibang Valley District: near Mayodia Inspection Bungalow, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=95.917&amp;materialsCitation.latitude=28.235" title="Search Plazi for locations around (long 95.917/lat 28.235)">Mehao Wildlife Sanctuary</a>; 28.235° N, 95.917° E; alt. 2513 m; 5 Sep. 2016; S.D. Gurumayum leg.; ZSI-WRC C.2173.</p> <p>Description of male holotype</p> <p>Carapace transversely ovate, broader than long (CW/CL = 1.2), low (CH /CW = 0.4); dorsal surface generally smooth, glabrous, conspicuously arched; anterolateral surface gently inflated in frontal view; anterolateral margins almost straight, subcristate, shorter than posterolateral margins; posterolateral margins converging posteriorly, almost straight medially; front broad (FW/CW = 0.3), strongly deflexed anteriorly, almost rectangular, anterior margin smooth, cristate, gently concave medially in dorsal view; epigastric cristae low, visible as 2 broad, rugose protuberances; postorbital cristae indiscernible; external orbital angle indistinct, low; epibranchial tooth very low, with very small cleft; postorbital region gently concave; branchial regions inflated; cervical grooves very shallow, narrow; mesogastric groove moderately deep, narrow, long, bifurcated posteriorly; H-shaped groove distinct; subhepatic region smooth, glabrous; suborbital region smooth, glabrous; pterygostomial region generally smooth, glabrous; supraorbital margin cristate, smooth, straight; suborbital margin cristate with low granules, almost straight on mesial half, curved upwards on lateral half, continuous with supraorbital margin; frontal medial triangle incomplete, with dorsal margin only, lateral margins indiscernible (Figs 1A– C, 3A). Epistome posterior margin with well-developed, narrowly triangular medial tooth and gently sinuous lateral margins (Fig. 1B).</p> <p>Eyes occupying most of orbital space; eyestalk short, stout; cornea moderately large, pigmented (Fig. 1B).</p> <p>Antennules short, folded in longitudinally broad fossae; antennae vestigial (Fig. 1B). Mandibular palp 3 segmented; terminal segment simple, undivided. First, second maxillipeds each with short flagellum on exopod. Third maxillipeds cover most of buccal cavity when closed; ischium subrectangular, longer than broad, with deep, oblique medial groove; merus subpentagonal, broader than long, sunken; exopod stout, tapered, reaching beyond anterolateral angle of ischium, completely lacking flagellum (Figs 1B– C, 3B).</p> <p>Chelipeds smooth, glabrous, unequal, right chela larger (Fig. 1A, C). Major chela with 5 low, blunt teeth on each finger, distinct gape when fingers closed; dactylus gently curved, moderately stout, shorter than palm, smooth; palm longer than high, smooth; carpus smooth, gently inflated, with low, blunt inner distal tooth; merus smooth, lacking subterminal spine (Fig. 1A, C).</p> <p>Ambulatory legs generally smooth, glabrous, slender, short, P3 longest; merus (P2–P5) elongated, lacking subdistal spine; dactylus (P2–P5) gently recurved, slightly longer than propodus, with distinct, sharp chitinous spines on margins (Fig. 1A, C).</p> <p>Thoracic sternites punctate, glabrous; s1 and s2 completely fused; s2/s3 prominent, deep, narrow, gently sinuous, reaching lateral margins; s3/s4 indiscernible; s4/s5, s5/s6, s6/s7 shallow, narrow, indiscernible towards sternopleonal cavity; s7/s8 shallow, narrow, medially interrupted by longitudinal groove of s7, lacking transverse ridge; s8 completely covered by pleon, narrowed medially, longitudinal medial groove indiscernible (Figs 1C, 3C). Pleonal locking mechanism with prominent tubercle on submedial part of s5. Sternopleonal cavity deep, long, reaching to imaginary line joining submedial part of cheliped coxae (Figs 1C, 3C).</p> <p>Pleon broad, triangular; pleonal somites 1–2 almost rectangular, narrower than pleonal somite 3; pleonal somite 3 subrectangular, broadest; pleonal somites 4–5 trapezoidal; pleonal somite 6 trapezoidal, distinctly broader than long (proximal width ca 3 × medial length), slightly longer than preceding pleonal somites, shorter than telson, with convex lateral margins (Figs 1C, 3C–D). Telson tongueshaped, broader than long (proximal width ca 1.5 × medial length), with concave lateral margins, apex broad, rounded (Figs 1C, 3C–D).</p> <p>G1 stout, long, tip reaching up to s4/s 5 in situ; flexible zone small; terminal segment stout, cylindrical, long, ca 0.6 × combined length of flexible zone and subterminal segment, curved outwards at angle of about 30° from longitudinal axis, distal half gently upcurved, tip broad, blunt, dorsal flap absent; subterminal segment almost straight, stout, broad at base, relatively narrow distally, outer margin sinuous, inner margin almost straight; groove for G2 median (Figs 3E, 4A–B). G2 slightly longer than G1, ca 1.1 × as long as G1; distal segment gently curved, cylindrical, long, ca 0.4 × as long as basal segment, with blunt tip; basal segment stout at proximal third, appearing narrowly ovate (Figs 3F, 4C).</p> <p>Remarks</p> <p>The male paratype (ZSI-WRC C.2171) of Gurumon gurumayum sp. nov. is an adult and slightly larger in size than the male holotype. The male paratype shares most of the morphological features with the holotype except for its relatively broader carapace, CW/CL = 1.3 (Fig. 2A) (vs carapace relatively less broad, CW/CL = 1.2 in the holotype; Figs 1A, 3A) and the straight s2/s3 (Fig. 2C) (vs s2/s3 gently sinuous in the holotype; Figs 1C, 3C).</p> <p>The female paratypes (ZSI-WRC C.2171, 2172) of Gurumon gurumayum sp. nov. are adults and slightly larger than the male holotype. All the female paratypes possess most of the non-sexual character states as those in the male holotype. Their carapace, however, is relatively broader, CW/CL = 1.3 (Fig. 2E, H) like that of the male paratype. All the female paratypes have subequal chelipeds (Fig. 2E, H) unlike the unequal chelipeds of the holotype and paratype males (Figs 1A, C, 2A). The pleonal somites and telson of the female paratypes are ovate in shape, which cover the thoracic sternum except for lateral edges when closed (Fig. 2F). Their pleonal somite 1 is the shortest; pleonal somites 2–5 are progressively longer; and pleonal somite 6 is the longest, much broader than long, subequal in length to the telson, with the convex lateral margins (Fig. 2F). The telson in the female paratypes is broadly triangular, much broader than long, with convex lateral margins and narrow apex (Fig. 2F). The vulvae in female paratypes are located apart from each other (VD/SW = ca 0.25) on s6, each opens mesially, subovate, large, occupying three-quarters the length of s6, touching but not pushing s5/s6 anteriorly, and covered by soft membranous operculum (Fig. 2G).</p> <p>Colour in life</p> <p>The cephalothorax is dark purple; the chelipeds are generally reddish brown with dark purplish-brown upper surface; and the ambulatory legs are light brown with dark purple blotches (Fig. 6).</p> <p>Ecological notes</p> <p>Gurumon gurumayum sp. nov. was found among the moss-covered stones in the shallow (ca 10 cm deep) and slow-flowing brooks of the subalpine forests of Mayodia during September and October. Located within the Mehao Wildlife Sanctuary, Mayodia is situated in the Mayu hills of the Lower Dibang Valley District of Arunachal Pradesh, which is about 56 km from the district headquarters at Roing. The new species is known to dwell at 2473–2513 m altitude and seems restricted to the high mountains. These crabs are very unlikely to be found during the winter season (Nov.–Feb.) as Mayodia experiences snowfall. Their activities, however, resume during the summer (Mar.–Jun.) (S.D. Gurumayum, personal communication).</p> <p>Geographical distribution</p> <p>Gurumon gurumayum sp. nov. is currently known only from two adjacent localities of the Mehao Wildlife Sanctuary in the Lower Dibang Valley District of Arunachal Pradesh State, northeastern India (Fig. 5).</p> </div>	https://treatment.plazi.org/id/F74A2513FFFDF108FDC82E2EFE9200F2	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.		Plazi	Pati, Sameer K.	Pati, Sameer K. (2022): Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. European Journal of Taxonomy 847: 28-45, DOI: https://doi.org/10.5852/ejt.2022.847.1979, URL: http://dx.doi.org/10.5852/ejt.2022.847.1979
