Capitamon meitei Pati, Mitra & Ng, 2024, n. sp.
Creators: name: Pati, Sameer K.
name: Mitra, Santanu
name: Ng, Peter K. L.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Potamidae
Capitamon
Capitamon meitei

description: Capitamon meitei n. sp.
(Figs 12; 13; 14)
urn:lsid:zoobank.org:act: 109C2D01-A922-4EE1-ABCE-710D7E91F2F2
TYPE MATERIAL. — Holotype. India • ♂ (51.7 × 38.8 mm); Manipur state: Thoubal district: Yairipok; 24°39’53”N, 94°3’50”E; alt. 784 m; 24.XI.2018; Thangpurba Devi leg.; ZSI-WRC C.2405.
Paratypes. India • ♂ (39.9 × 30.4 mm), ♀ (36.0 × 27.4 mm); Manipur state: Kangpokpi district: Leimakhong; 24°56’31”N, 93°50’27”E; alt. 884 m; 27.V.2019; Thangpurba Devi leg.; ZSI-WRC C.2406.
DIAGNOSIS. — Carapace ovate, broader than long (CW /CL = 1.3- 1.4), relatively low (CH /CW = 0.4); epigastric cristae well-developed, rugose; postorbital cristae well-developed, relatively sharp, oblique in dorsal view; external orbital angle triangular, with short outer margin, c. 2 × inner margin; epibranchial tooth low, blunt, positioned above level of postorbital cristae; cervical grooves continuous, reaching to level of postorbital cristae; epistome posterior margin with well-developed, triangular median tooth, outer parts sloping downwards laterally (Fig. 12A, B). Third maxilliped exopod with short flagellum, shorter than width of merus (Fig. 13B). Chelipeds rugose, unequal in adult males, inner distal tooth on carpus relatively broad (Figs 12A, C; 13C). Male s3/s4 indiscernible (Figs 12C; 13D). Male pleonal somite 6 relatively broader (proximal width c. 2.1-2.2 × medial length), equal in length to pleonal somite 5, with convex lateral margins (Figs 12C; 13E). Male telson relatively broader (proximal width c. 1.3-1.4 × medial length), with gently to strongly concave lateral margins (Figs 12C; 13E). G1 ultimate article relatively less strongly bent at angle of about 75° from longitudinal axis, with sinuous outer margin, dorsal flap relatively high, narrowly triangular (Figs 13F; 14A, C-E). G2 c. 1.2 × length of G1; ultimate article long, c. 0.5 × length of penultimate article (Figs 13G; 14B, D). Vulvae laterally completely covered by protruding sternal cover, invisible in ventral view (Fig. 13I).
ETYMOLOGY. — The species name, meitei, means Manipuri, the people/language of Manipur. The name is used as a Latin noun in apposition.
GEOGRAPHICAL DISTRIBUTION. — Capitamon meitei n. gen., n. sp. is known only from Manipur state of northeastern India (Fig. 1).
REMARKS
Among the nominal species of the genus, C. meitei n. gen., n. sp. most resembles C. mizoramense n. gen., n. sp. mainly by the G1 ultimate article, which has a sinuous outer margin, and the relatively high and narrowly triangular dorsal flap (Figs 13F; 14A, C-E; 16F; 17A, C-E). Capitamon meitei n. gen., n. sp. is nevertheless differentiated from C. mizoramense n. gen., n. sp. by the relatively less strongly bent G1 ultimate article, which is bent at an angle of about 75° from longitudinal axis of the G1 (Figs 13F; 14D, E) (vs G1 ultimate article more strongly bent at an angle of about 110° from longitudinal axis of the G1; Figs 16F; 17D, E). In addition, the vulvae are completely covered laterally by the protruding sternal cover and invisible in the ventral view in C. meitei n. gen., n. sp. (Fig. 13I), whereas the vulvae are partially covered laterally by the protruding sternal cover and visible in the ventral view in C. mizoramense n. gen., n. sp. (Fig. 16I).
description: Published as part of Pati, Sameer K., Mitra, Santanu & Ng, Peter K. L., 2024, Identity of the freshwater crab Indochinamon beieri (Pretzmann, 1966), with the description of a new genus and four new species from northeastern India (Decapoda, Brachyura, Potamidae), pp. 589-615 in Zoosystema 46 (23) on pages 605-606, DOI: 10.5252/zoosystema2024v46a23, http://zenodo.org/record/13837101