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Siluriformes (Catfishes) >
Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: Trichomycterus: Greek, thrix = hair + Greek, mykter, -eros = nose (Ref. 45335); minus: The name 'minus', in reference to the English word, mine, alludes to the mining activities common in the portion of the Province of Catamarca where the species was captured..
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce demersal; intervalo de profundidade ? - 1 m (Ref. 94174). Subtropical
South America: Río Cuevas in Argentina.
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 7.5 cm SL macho/indeterminado; (Ref. 94174)
Descrição suscinta
Chaves de identificação | Morfologia | Morfometria
Raios dorsais (total) : 11 - 14; Vértebras: 36. Diagnosed from other species of Trichomycterus , except T. alterus, T. aguarague , T.belensis , T. boylei, and T. ramosus, by having 3 supraorbital pore, discontinuous supraorbital canal, expanded supraorbital tendon bone, and the premaxilla equal in size to, or smaller than, the maxilla. Can be separted from these five species by the following characters: non-enlarged base of the maxillary barbel, thick rugose layer of fatty tissue on the head and body absent; and integument on the surface of the interopercle not covering the odontodes. Can be further differentiated from T. alterus in the only slightly compressed caudal peduncle, presence of dark pigmentation on the area of the body anteroventral to the dorsal-fin origin not covering the odontodes, and the profile of the head from a dorsal view which is not much wider posteriorly than anteriorly; from T. aguarague in having four or five premaxillary tooth rows; from T. belensis in the uniformly brown pigmentation on the body and the lack of dark pigmentation on the basal portions of the caudal-fin rays; from T. boylei in the profile of the head from a dorsal view which is not much wider posteriorly than anteriorly; and from T. ramosus in the distally unbranched barbels of variable width along their length (Ref. 94174).
Found in a small, silt-laden stream with 0.2 to 1.0 m depth, 1.0 to 2.5 m width over a sand and rock bottom without aquatic vegetation, flow rate 0.037m3/s, conductivity 0.614 mS/ cm, turbidity 10, dissolved oxygen 4.96 mg/l, and temperature 20°C. Hides under rocks. Feeds on autochthonous benthic macroinvertebrates (dipteran larvae and Ephemeroptera) (Ref. 94174)
Ciclo de vida ou comportamento de acasalamento
Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas
Fernández, L. and R.P. Vari, 2012. New species of Trichomycterus (Teleostei: Siluriformes) from the Andean Cordillera of Argentina and the second record of the genus in thermal waters. Copeia 2012(4):631-636. (Ref. 94174)
Status na Lista Vermelha da UICN (Ref. 130435)
Ameaça para os humanos
Harmless
Uso pelos humanos
Ferramentas
Relatórios especiais
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Estimates based on models
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00319 - 0.02993), b=3.02 (2.77 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
