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Listrura nematopteryx de Pinna, 1988

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Description: Differs from congeners in having one pectoral fin ray. Pectoral, dorsal and anal fin rays unbranched; 31-35 dorsal procurrent caudal fin rays, 28-32 ventral procurrent caudal fin rays; 14-19 premaxillary teeth; 13-18 dentary teeth. Etymology: The genus name Listrura: listron, shovel; ourá, tail, referring to numerous accessory rays on tail, which make the caudal region shovel-shaped. The specific name nematopteryx: nematos, threaded; ptéryx, wing or fin, referring to its extremely narrow, one-rayed, filamentous pectoral fin. Remarks: Occurs in the Estrela River basin, in the municipality of Magé, state of Rio de Janeiro. The species is known only from microhabitats formed by unconsolidated substrate, with running water and vegetation. Recent collection efforts in the region have not revealed new subpopulations. The species has been recorded in only two localities, and its type locality has been severely decharacterized and this subpopulation has been considered extinct. Its known area of occupancy (AOO) was estimated at 4 km2 and the number of localities is equal to one. Intense urbanization compromises the quality of the habitat. Thus, Listrura nematopteryx has been listed as Critically Endangered (CR), (IUCN 2018).

Common Name:

None

Synonyms:

None

Family:

Trichomycteridae

Distribution:

South America: Estrela River basin in Rio de Janeiro State and Picinguaba, São Paulo State, Brazil.

Size:

3.5cm. (1½ins)

Temp:

25-28°c (77-83°f.)

p.H.

6.0-7.0.

Reference:

de Pínna, M.C.C. and W. Wosiacki, 2003. Trichomycteridae (pencil or parasitic catfishes). p. 270-290. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.
Froese, R. and D. Pauly. Editors. 2024. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 08/2024 ).
Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio). 2021. Listrura nematopteryx. The IUCN Red List of Threatened Species 2021.

Family: Trichomycteridae Back to Ident-A-Cat Click on Thumbnails

Listrura nematopteryx

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