Classification / Names
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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
Sinh thái học
; Nước ngọt gần đáy. Tropical
South America: Upper rio do Peixe drainage, serra da Mantiqueira, upper rio Paraíba do Sul basin in southeastern Brazil.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 7.7 cm SL con đực/không giới tính; (Ref. 86272)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Các vây lưng mềm (tổng cộng) : 11 - 12; Tia mềm vây hậu môn: 10; Động vật có xương sống: 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).
Life cycle and mating behavior
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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)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (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).
Mức dinh dưỡng (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
