Tridens chicomendesi

Tridens chicomendesi Henschel & Costa, 2023

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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Siluriformes (Catfishes) > Trichomycteridae (Pencil or parasitic catfishes) > Tridentinae
Etymology: Tridens: Greek, tres tria = three + Latin, dens = teeth (Ref. 45335); chicomendesi: Name 'chicomendesi' after Chico Mendes, a worldwide known rubber worker from the type locality of the species.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal. Tropical

Distribution Territories | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Brazil.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 2.1 cm SL male/unsexed; (Ref. 137638)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 15; Anal soft rays: 25 - 26. This species is distinguished by the following set of characters: 45-46 vertebrae; D 15, A 25-26; absence of a series of black spots along the anal-fin base; emarginate caudal fin; the anal and the urogenital openings situated at a vertical through the centrum of the 23rd or 24th vertebrae; the anal-fin origin at a vertical through the centrum of the 24th or 25th vertebrae; the mesehtmoid axis not completely over its cornu; a longer maxillary barbel, its tip reaching the first anterior 50% of the orbit length; more premaxillary teeth; lateral-line pores 3; a wider frontal, its anterior half approximately four times its posterior half width; ossified and maxilla; broad joint between quadrate and hyomandibula; longer posterodorsal process of hyomandibula, its length 20% of hyomandibula length; broad opercular patch of odontodes; interopercular odontodes 4; the upper hypural plate cartilage occupying about 50% of its area; absence of a proximal, distal and ventral cartilages on ventral hypohyal; absence of a lateral process on basibranchial 4; the presence of a cartilage block on the lateral process of autopalatine; the presence of a well developed ossification on proximal margin of ventral hypohyal; the presence of hypobranchial foramen; presence of an anterior joint between quadrate and base of posterodorsal process of hyomandibula (Ref. 137638).
Body shape (shape guide): elongated; Cross section: compressed.

Biology     Glossary (e.g. epibenthic)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Pinna, Mário de | Collaborators

Henschel, E., W.M. Ohara and W.J.E.M. Costa, 2023. Two newminiature translucent catfish species of the rare genus Tridens (Siluriformes: Trichomycteridae) from the Madeira River basin, northern Brazil. J Fish Biol. 103:155-171. (Ref. 137638)

IUCN Red List Status (Ref. 130435: Version 2025-2)

Not Evaluated 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: of no interest
FAO - Publication: search | FishSource |

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