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Siluriformes (Catfishes) >
Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: Trichomycterus: Greek, thrix = hair + Greek, mykter, -eros = nose (Ref. 45335); maculosus: Name from the Latin 'maculosus', meaning spotted, in reference to its color pattern.
More on authors: Barbosa & Costa.
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce demersal. Tropical
South America: Upper rio do Peixe drainage, serra da Mantiqueira, upper rio Paraíba do Sul basin in southeastern Brazil.
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 7.7 cm SL macho/indeterminado; (Ref. 86272)
Descrição suscinta
Chaves de identificação | Morfologia | Morfometria
Raios dorsais (total) : 11 - 12; Raios anais : 10; Vértebras: 36 - 37. Closely related to Trichomycterus itatiayae, Trichomycterus nigroauratus and
Trichomycterus diabolus, and can be diagnosed from all its congeners from southeastern Brazil by having a broad metapterygoid. Distinguished from these three species by having 45-52 interopercular odontodes; differs from Trichomycterus itatiayae and Trichomycterus diabolus by having seven branchiostegal rays, and 17 to 18 opercular odontodes. Differs further from Trichomycterus itatiayae by the possession of eight pectoral-fin rays, ten anal-fin rays, origin of anal fin in the vertical through the posterior portion of the dorsal-fin base, opercular and interopercular odontodes conical, caudal-fin subtruncate, and color pattern with dark gray row of blotches horizontally elongated along lateral midline of body; from Trichomycterus nigroauratus by having more slender head (head depth 34.9-44.5% of head length vs. 44.8-50.8%), narrower caudal peduncle (caudal peduncle width 1.8-2.4% SL vs. 2.4-3.3%), color pattern showing a dark gray row of blotches horizontally elongated along lateral midline of body and by the absence of golden stripes on the flank; from Trichomycterus diabolus by having caudal fin subtruncate, absence of osseous articulation between metapterygoid and quadrate, presence of filament on pectoral fin and absence of unpigmented zone on proximal region of caudal fin (Ref. 86272).
Occurs in stream with clear water, rapid flow and green color. Observed active during the day in shallow places (10-50 cm depth) along the margins, on gravel substrate (Ref. 86272).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Barbosa, M.A. and W.J.E.M. Costa, 2010. Description of a new species of the catfish genus Trichomycterus (Teleostei: Siluriformes: Trichomycteridae) from the rio Paraíba do Sul basin, southeastern Brazil). Verteb. Zool. 60(3):193-197. (Ref. 86272)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2024-2)
Ameaça para os humanos
Harmless
Uso pelos humanos
Ferramentas
Relatórios especiais
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Fontes da internet
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 (0.00400 - 0.02388), b=3.04 (2.84 - 3.24), in cm total length, based on LWR estimates for this Genus-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).
