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Trichomycterus araxa Costa, Mattos, Sampaio, Giongo, Almeida & Katz, 2022 |
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photo by
Costa, W.J.E.M. et al., 2022 |
| Family: | Trichomycteridae (Pencil or parasitic catfishes), subfamily: Trichomycterinae | |||
| Max. size: | 6.4 cm SL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | South America: Brazil. | |||
| Diagnosis: | Dorsal spines (total): 2-2; Dorsal soft rays (total): 7-7; Anal spines: 2-2; Anal soft rays: 5-5; Vertebrae: 35-35. This species is distinguished from its congeners by the following set of characters: black median longitudinal stripe on the caudal fin present in juvenile specimens below about 40 mm SL; long pectoral-fin filament, its length about 40-60% of pectoral-fin length in specimens about 50 mm SL or larger; anterior infraorbital canal present, supported by an elliptical antorbital; a moderately deep opercular odontode patch; posterior margin of the metapterygoid, anterior margin of the hyomandibula anterior outgrowth and dorso-posterior margin of the quadrate slightly curved; and prominent projection on the lateral margin of the lateral ethmoid, ventrally overlapping the sesamoid supraorbital absent (Ref. 138853). | |||
| Biology: | ||||
| IUCN Red List Status: | Not Evaluated (N.E.) Ref. (130435) | |||
| Threat to humans: | harmless | |||