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> Siluriformes (Catfishes) > Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: Trichomycterus: Greek, thrix = hair + Greek, mykter, -eros = nose (Ref. 45335); therma: Specific name, therma (hot), from the Greek city of Therma, known for its hot springs, referring to the habitat of this species in thermal water..

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

; acqua dolce demersale; pH range: 8.2 - ?; distribuzione batimetrica 0 - ? m (Ref. 72406). Tropical; 37°C - ? (Ref. 72406)

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

South America: thermal stream in Miraflores, north of Potosi, Bolivia.

Size / Peso / Age

Maturity: L_m ? range ? - ? cm
Max length : 5.8 cm SL maschio/sesso non determinato; (Ref. 72406)

Short description Morfologia | Morfometria

Raggi dorsali molli (totale): 14; Raggi anali molli: 11; Vertebre: 32. Can be easily distinguished from all other species of the genus Trichomycterus from western and southern South America by possessing an autapomorphic thickened transverse skin on the ventral surface of the head. Differs further from other congeners except Trichomycterus corduvensis from Argentina and Trichomycterus tiraquae from Bolivia by the combination of the following characters: presence of spatulate incisiform premaxillary teeth; presence of large and rounded papilla-like structures on the trunk of the body; the continuous segment of the laterosensory canal within the frontal with the presence of a segment between pores 2 and 6; and laterosensory canal on trunk with 4 to 6 pores. Can be differentiated from Trichomycterus tiraquae and Trichomycterus corduvensis by the shape of the maxilla, which has a short anterior process that is shorter than the main axis of the bone and is anteriorly oriented (vs. anterior process enlarged and equal to, or longer than the main axis of the bone and with an anterolateral orientation); mesethmoid shaft narrower than the width of the lateral cornua (vs. shaft equal to or wider than width of lateral cornua). Differ also from Trichomycterus tiraquae by having prepelvic length 58.7-61.0% of SL (vs. 56.6-57.6), head width 19.1-22.8% of SL (vs. 17.4-18.9); the submaxillary barbel length 23.9-37.5% of SL (vs. 43.3-54.8) (Ref. 72406).

Inhabits clear water stream with depth 0.15-0.5 m and that runs over clay and rock-pebble substrata with algae and with high geothermal activity. Found mainly in the area with water temperature of 37°C and pH of 8.2 (Ref. 72406). Stomach contents based on three specimens showed that Diptera (mostly Chironomidae) and Coleoptera (Elmidae) as the main components of the diet of this species (Ref. 72406).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

Main reference Upload your references | Bibliografia | Coordinatore : Pinna, Mário de | Collaboratori

Fernández, L. and G. Miranda, 2007. A catfish of the genus Trichomycterus from a thermal stream in southern South America (Teleostei, Siluriformes, Trichomycteridae), with comments on relationships within the genus. J. Fish Biol. 71(5):1303-1316. (Ref. 72406)

IUCN Red List Status (Ref. 130435)

Critically Endangered (CR) (B2ab(iii)); Date assessed: 27 October 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00851 (0.00355 - 0.02043), b=2.93 (2.74 - 3.12), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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Trichomycterus therma Fernández & Miranda, 2007