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Ivan Sazima (3)

Habitat: Found in streams in the Atlantic forest; backwaters with no flow to 0.44 meter per second water flow. Dwells mostly in pools beneath small waterfalls in steep hill streams flowing over rocky and sandy substrates. Density varies from 3 to 25 individuals per square meter. At densities of 18 to 25 individuals per square meter, fish aggregates in loose groups of up to 30 individuals; largest ones tend to be solitary and territorial. Nektonic, active both during daytime and at night; juveniles and small adults of up to 9 cm TL are more active at daytime, whereas larger ones are active mostly at night. Reproduction: Reproduces at the onset of rainy season (austral summer). Mature oocytes about 0.2 cm diameter; pterigyolarvae range 1-1.5 cm TL. Colouration: Spotted colour pattern differs consistently between stream populations, an indication of genetic differentiation. Diet: Uses visual, tactile, and chemo-sensory orientation to feed on bottom-dwelling aquatic and terrestrial arthropods in the water column or on the surface. Diet includes immature aquatic insects, crustaceans, adult terrestrial winged insects whole or fragmented, as well as carrion. Forages mostly by scanning the bottom, the barbels touching the substrate, but visual oriented drift feeding is also employed by individuals up to 5 cm TL. While foraging may bury into sand or plant debris and sifts through opercular openings and mouth. Etymology: The genus name Trichogenes: meaning A combination of tricho– from Trichomycteridae and –genes from the cetopsid catfishes of Helogenes, referring to superficial resemblance to that genus (specifically, the long anal fin). The specific name longipinnis: Meaning long fins. Remarks: The extent of occurrence (EOO) calculated by the smallest convex polygon is 958 km2. Although it occurs within Conservation Units, its proximity to urban centers, tourist regions and roads poses threats to the quality of the habitat, which cannot yet be quantified but should be monitored. However, there is insufficient information to apply criteria (a or c). Therefore, Trichogenes longipinnis was listed as Near Threatened (NT), (IUCN 2018).

Long-finned cambeva

None

Trichomycteridae

South America: Coastal drainages in northern São Paulo State, Brazil. Type Locality: Cachoeira do Amor, km 3 da estrada Parati-Ubatuba, SP [Brazil].

14.0cm. (5½ins)

25-28°c (77-83°f.)

6.0-7.0.

Burgess, W.E., 1989. An atlas of freshwater and marine catfishes. A preliminary survey of the Siluriformes. T.F.H. Publications, Inc., Neptune City, New Jersey (USA). 784 p.
Chico Mendes Institute for Biodiversity Conservation (ICMBio). 2022. Trichogenes longipinnis . The IUCN Red List of Threatened Species 2022.
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Froese, R. and D. Pauly. Editors. 2024. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 07/2024 ).
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.