Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Trichomycteridae
(Pencil or parasitic catfishes) > Trichomycterinae
Etymology: Trichomycterus: Greek, thrix = hair + Greek, mykter, -eros = nose (Ref. 45335). More on author: Vari.
Environment / Climate / Range
Freshwater; benthopelagic. High altitude, preferred ?; 26°S - 27°S
South America: Laguna Blanca basin in Catamarca, Argentina.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 4.2 cm male/unsexed; (Ref. 39970)
Morphology | Morphometrics
soft rays: 11 - 12;
Vertebrae: 37 - 39. Eye covered by thin, transparent skin. Species differs from all other known members of the subfamily Trichomycterinae by the combination of its lack of both the pelvic fins and girdle, eight or nine principle dorsal fin rays, 37-39 vertebrae, 18-20 ribs on each side, the elongate body with a transversely flattened caudal peduncle, the posteriorly straight and slightly posterodorsally angled caudal fin margin, the lack of pronounced marmorated pigmentation on the body and fins, its lack of s very thick, rugose layer of fatty tissue on the body and head, the presence of a portion of the laterosensory canal system within the sphenotic, the lack of an extensive perforation of the skin surface by pores of the ampullary organs, and its maximum length.
Collected from a 0.5 m deep, small, clear water stream with a sandy bottom at an elevation of approximately 3500 m. The stomachs of two specimens contained dipteran larvae (Chironomidae and Ceratopogonidae), filamentous algae, and sand indicating that the species feeds, at least in part on autochthonous benthic macroinvertebrates (Ref. 37038).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Fernández, L. and R.P. Vari, 2000. New species of Trichomycterus (Teleostei: Siluriformes: Trichomycteridae) lacking a pelvic fin and girdle from the Andes of Argentina. Copeia 2000(4):990-996. (Ref. 37038)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), based on all LWR estimates for this body shape (Ref. 93245
Trophic Level (Ref. 69278
): 2.8 ±0.31 se; Based on food items.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Assuming Fec < 100).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .