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Imparfinis guttatus (Pearson, 1924)

Image contributors to this species:

Felipe Alonso (1) Nathan Lujan (1)

ScotCat Sources:

Other Sources:

Relevant Information:

Abstract: Specimens of Imparfinis were recently collected in northwestern Argentina from the Bermejo River basin (Salta and Jujuy Provinces), del Valle River (Salta Province) and Horcones River (Santiago del Estero Province). An integrative approach to taxonomy, combining a detailed morphological study and molecular phylogenetic analyses, was applied in order to determine the species identity of these specimens. A principal components analysis of morphological data clustered the specimens from northwestern Argentina and from the Amazon basin, indicating a close morphological resemblance. Also, a molecular phylogenetic analysis showed populations of I. guttatus from Argentina and Peru forming a clade. According to the conducted haplotype network analysis these populations are distinct in two mutations. Thus, in absence of morphological or molecular data indicating the contrary, the combined method supports the identity of the specimens from the tributaries of the Paraguay River in Argentina as Imparfinis guttatus, whose type locality is in the upper Beni River basin in Bolivia. This contribution is also the first record for this species from Argentina. The disjunct distribution of I. guttatus provides new evidence reinforcing the hypothesis for the origin of the Paraguayan ichthyofauna. We also provide an approach to the phylogenetic relationships of Imparfinis in Heptapteridae (Aguilera, G. et al 2022). Aquarium Care: An aquarium with hiding places such as bogwood, rockwork, plants and a sand substrate. A good water flow is recommended with good aeration and filtration. Can be housed with small species such as tetras as their small size does not present a hazard but may eat small fry from other species. Diet: Small live, frozen and flake foods.

Common Name:

None

Synonyms:

Nannorhamdia guttatus

Family:

Heptapteridae

Distribution:

South America: Mamoré and Pilcomayo River basins, Bolivia and Peru. Type locality: Popoi River, Upper Beni [Bolivia].

Size:

12.5cm. (5ins)

Temp:

24-28°C (75-83°F)

p.H.

6.0-7.0.

Reference:

Aguilera, G., Terán, G.E., Mirande, J.M., Alonso, F., Chumacero, G.M., Cardoso, Y., Bogan, S. and Faustino-Fuster, D.R. (2022), An integrative approach method reveals the presence of a previously unreported species of Imparfinis Eigenmann and Norris 1900 (Siluriformes: Heptapteridae) in Argentina. J Fish Biol.
Bockmann, F.A. and G.M. Guazzelli, 2003. Heptapteridae (Heptapterids). p. 406-431. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.
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. 2022. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 02/2022 ).

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

Imparfinis guttatus

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