Cambeva grisea

description

(Figs 6, 11 F, 12 F, 13 F; Table 6) urn: lsid: zoobank. org: act: A 5 CFD 65 E- 416 F- 4722 - AE 0 B- 9335 C 766 E 27 F

Field inventory reveals high diversity of new species of mountain catfishes, genus Cambeva Katz, Barbosa, Mattos & Costa, 2018 (Siluriformes: Trichomycteridae), in south-eastern Serra Geral, southern Brazil

description

DESCRIPTION General morphology Morphometric data in Table 6. Body slender, subcylindrical and slightly depressed anteriorly, compressed posteriorly. Greatest body depth in area just anterior to pelvic-fin base. Dorsal profile of head and trunk slightly convex, approximately straight on caudal peduncle; ventral profile straight to slightly convex between lower jaw and end of anal-fin base, straight on caudal peduncle. Skin papillae minute. Anus and urogenital papilla in vertical just posterior to dorsal-fin origin. Head subtrapezoidal in dorsal view, almost rectangular, with anterior profile of snout slightly convex. Eye small, dorsally positioned in head, on its anterior half. Posterior nostril located nearer anterior nostril than orbital rim. Tip of maxillary and rictal barbels reaching area between interopercular patch of odontodes and pectoral-fin base; tip of nasal barbel reaching area between eye and opercular patch of odontodes. Mouth subterminal. Jaw teeth 26 - 35 in both jaws, incisiform in specimens above about 35 mm SL, pointed in smaller specimens, always irregularly distributed. Branchial membrane attached to isthmus only at its anterior point. Branchiostegal rays 8. An

Field inventory reveals high diversity of new species of mountain catfishes, genus Cambeva Katz, Barbosa, Mattos & Costa, 2018 (Siluriformes: Trichomycteridae), in south-eastern Serra Geral, southern Brazil

diagnosis

DIAGNOSIS. — Cambeva grisea n. sp. is distinguished from C. brachykechenos, the only other species of the C. brachykechenos complex, in having more pleural ribs (13 - 15, vs 12), anal and dorsal fins more posteriorly placed relatively to vertebrae (dorsal-fin origin in a vertical through centrum of the 20 th or 21 st vertebra, vs 19 th; anal-fin origin in vertical through centrum of 23 rd or 24 th vertebra, vs 21 st or 22 nd), and a different colouration on the flank (pale brownish grey, sometimes with dark grey pigment irregularly distributed, vs dark brown with small light brownish grey spots). Cambeva grisea n. sp. also seems to be smaller than C. brachykechenos, with the largest specimen found reaching only 52.3 mm SL (vs 70.9 mm SL recorded for C. brachykechenos by Ferrer & Malabarba 2013).

Field inventory reveals high diversity of new species of mountain catfishes, genus Cambeva Katz, Barbosa, Mattos & Costa, 2018 (Siluriformes: Trichomycteridae), in south-eastern Serra Geral, southern Brazil

distribution

DISTRIBUTION. — Cambeva grisea n. sp. occurs in the eastern forested slope. It is known from the Rio Araranguá basin, in altitudes about 160 - 300 m asl (Fig. 14).

Field inventory reveals high diversity of new species of mountain catfishes, genus Cambeva Katz, Barbosa, Mattos & Costa, 2018 (Siluriformes: Trichomycteridae), in south-eastern Serra Geral, southern Brazil