Klassifizierung / Names
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Siluriformes (Catfishes) >
Trichomycteridae (Pencil or parasitic catfishes) > Tridentinae
Etymology: Tridens: Greek, tres tria = three + Latin, dens = teeth (Ref. 45335); vitreus: Name vitreus from the Latin word 'viteus', meaning 'glossy, translucent', in reference to the transparency of the head and body in life.
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
; süßwasser demersal. Tropical
South America: Brazil.
Größe / Gewicht / Alter
Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 2.0 cm SL Männchen/unbestimmt; (Ref. 137638)
Kurzbeschreibung
Bestimmungsschlüssel | Morphologie | Morphometrie
Rückenflossenweichstrahlen (insgesamt) : 14; Afterflossenweichstrahlen: 21; Wirbelzahl: 48 - 49. This species is distinguished by the following set of characters: pelvic fin and girdle absent; 48 or 49 vertebrae and a total of 14 dorsal-fin rays; emarginate caudal fin; anal and the urogenital openings situated at a vertical through the centrum of the 25th vertebra; anal-fin origin at a vertical through the centrum of the 27th or 28th vertebrae; the mesehtmoid axis completely over its cornu; a shorter maxillary barbel, its tip reaching the first anterior 25% of the orbit length; premaxillary teeth 81-82; dorsal-fin rays 14; anal-fin rays 21; lateral-line pores 2; a slender frontal, its anterior half approximately two times wider than its posterior half width; a cartilaginous maxilla; a robust maxilla; a narrow joint between quadrate and hyomandibula; posterodorsal process of the hyomandibula 5% of the hyomandibula length; slender opercular patch of odontodes; interopercular odontodes 5; the upper hypural plate cartilage occupying about 25% of its length; the presence of a proximal, distal and ventral cartilages on the ventral hypohyal; 4 lateral process on the basibranchial present; cartilage block on the lateral process of the autopalatine absent; well developed ossification on the proximal margin of the ventral hypohyal absent; hypobranchial foramen absent; and anterior joint between the quadrate and base of the posterodorsal process of the hyomandibula absent (Ref. 137638).
Body shape (shape guide): elongated; Cross section: oval.
This species inhabits small white water stream with slow current and substrate predominantly composed of sand (Ref. 137638).
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
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 Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: nicht kommerziell
Tools
Zusatzinformationen
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Internet Quellen
Schätzungen auf der Grundlage von Modellen
Phylogenetischer Diversitätsindex (Ref. 82804) |
PD50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
Trophische Ebene (Ref. 69278) |
3.0 ±0.3 se; based on size and trophs of closest relatives |
Anfälligkeit der Fischerei (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |