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Trichomycterus immaculatus (Eigenmann & Eigenmann, 1889)

Image contributors to this species:

Mark Henry Sabaj (3) Ivan Sazima (2)

ScotCat Sources:

Other Sources:

Relevant Information:

Description: Trichomycteridae is a monophyletic group composed of eight subfamilies, 41 genera and approximately 207 species (Ferraris 2007). Seven subfamilies are demonstrably monophyletic groups, but Trichomycterinae is the largest and clearly a polyphyletic group of Trichomycteridae (Wosiacki 2002). The Trichomycterus genus, touted as not monophyletic (de Pinna 1989), is the richest and most widely distributed of Trichomycteridae family, with 113 valid species spread throughout South and Central America, on both sides of the Andes (de Pinna and Wosiacki 2003, Ferraris 2007). A considerable diversity of Trichomycterus species occurs in the hydrographic basins of South and Southeast of Brazil. In these regions 34 species (Bockman et al. 2004) have been described. Etymology: The specific name imamaculatus: Derived from the Latin adjective, immaculatus, meaning unspotted or unstained, in allusion to the colouration pattern of the species, lacking dots or spots. Remarks: T. immaculatus sports ventral armatures (odontodes) along opercles that help it cling to rocky surfaces (Sabaj, Mark Henry 2018).

Common Name:

None

Synonyms:

Pygidium immaculatum

Family:

Trichomycteridae

Distribution:

South America: Paraíbuna River, Paraíba do Sul River basin, Brazil. Type locality: Juiz de Fora, Rio Parahybuna, Sao Matheos, Goyaz [Brazil].

Size:

9.5cm. (3¾ins)

Temp:

22-26°c (71-79°f.)

p.H.

6.0-7.0.

IUCN Red List

Trichomycterus immaculatus is endemic to coastal rivers from southern Bahia to southern São Paulo state. Due to its wide distribution, relatively high abundance, and the absence of significant identified threats to its population, Trichomycterus immaculatus has been categorised as Least Concern (LC), (IUCN 2022).

Reference:

Burgess, W.E., 1989. An atlas of freshwater and marine catfishes. A preliminary survey of the Siluriformes. T.F.H. Publications, Inc., Neptune City, New Jersey (USA). 784 p.
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Froese, R. and D. Pauly. Editors. 2019. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 01/2019 ).
Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio). 2022. Trichomycterus immaculatus. The IUCN Red List of Threatened Species 2022.
Sabaj, Mark Henry; FB page 2018.

Family: Trichomycteridae Back to Ident-A-Cat Click on Thumbnails

Trichomycterus immaculatus
Rio Piracicaba, São Paulo state southeastern Brazil

Trichomycterus immaculatus
Head view-Rio Piracicaba, São Paulo state southeastern Brazil

Trichomycterus immaculatus
Ventral view-Rio Piracicaba, São Paulo state southeastern Brazil

Trichomycterus immaculatus
Brazil, Maringá, Rio Preto, Bocaina de Minas

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