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Silvinichthys bortayro Fernández, de & Pinna, 2005

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Image of Silvinichthys bortayro
No image available for this species;
drawing shows typical species in Trichomycteridae.


Argentina country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known only from artificial wells at San Luis, Departamento Capital, Provincia de Salta, western Argentina (Ref. 55738). Also Ref. 84422.
National Checklist: Argentina
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ar.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Fernández, L. and M.C.C. de Pinna, 2005
National Database:

Common names from other countries

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Siluriformes (Catfishes) > Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: bortayro: Named for Gonzalo Padilla Bortayro, who first collected material of this species and brought it to the attention of the authors..

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

; zoet water demersaal.   Tropical

Verspreiding Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri

South America: artificial wells in western Argentina.

Grootte / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 2.8 cm SL mannelijk / geslacht onbekend; (Ref. 55738)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale zachte stralen (totaal) : 9; Anale zachte stralen: 8 - 10. Differs from other species of the subfamily Trichomycterinae by the extreme elongation of the opercle and narrow odontode-bearing distal plate. Further differs by having elongated and curved coronoid process of the lower jaw. The lack of pelvic fin and girdle further differs this species from all other Trichomycterinae except Eremophilus mutisii, E. candidus and Trichomycterus catamarcensis, species that are readily distinguished from Silvinichthys bortayro by their coloration pattern. The pale integumentary pigmentation and reduction of the eyes are troglomorphic characters that are paralleled only in cave-dwelling species Trichomycterus itacarambiensis and T. chaberti among presently known trichomycterines. Can be easily distinguished from those two species by its proportionally much shorter body and fewer pectoral-fin rays (6 vs 7 and 10, respectively). Further differs except Silvinichthys mendozensis by the absece of a latero-sensory canal branch in the frontal and sphenotic; and also differs from S. mendozensis in having 6 versus 7 or 8 pectoral-fin rays and the absence versus presence of the pelvic fin and girdle (Ref. 55738).

Biologie     Verklarende woordenlijst (bv. epibenthic)

Levenscyclus en paargedrag Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven

Hoofdreferentie Upload your references | Referenties | Coördinator : Pinna, Mário de | Medewerkers

Fernández, L. and M.C.C. de Pinna, 2005. Phreatic catfish of the genus Silvinichthys from southern South America (Teleostei, Siluriformes, Trichomycteridae). Copeia 2005(1):100-108. (Ref. 55738)

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Bedreigd (EN) (B1ab(iii)); Date assessed: 01 November 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless




Gebruik door de mens

FAO(Publication : search) | FishSource |

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00282 - 0.01550), b=2.99 (2.79 - 3.19), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.1   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).