All FishesPseudopimelodidaeMicroglanis

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Scientific Name Microglanis malabarbai  Bertaco & Cardoso, 2005
Common Name
Type Locality Arroio Albino, tributary of Rio Ijuí (Rio Uruguay drainage), 28°08'10''S 54°55'28''W, São Pedro do Butiá, Rio Grande do Sul, Brazil
Etymology Micro - small, glanis - catfish - in reference to the rather small forms of catfish that this genus contains. The specific name honors Luiz Roberto Malabarba for his active contribution to the knowledge of the Neotropical ichthyofauna.
Hop to next section Species Information
Size 50mm or 2" SL. Find near, nearer or same sized spp.
Identification The genus Microglanis was described by Eigenmann (1912) to include small pimelodids with the head as wide as long, the skull covered by skin only; the occipital crest small; frontal fontanel not extending much if any behind the eye, and a minute occipital fontanel sometimes present; eye without a free orbital margin; dorsal and pectoral spines well developed; and premaxillary patches of teeth without backward projecting angles.

This species was distinguished originally from all other Microglanis species by the caudal fin colour pattern which is almost completely black with a narrow vertical white band across central portions of the caudal-fin rays. Since then, genetically similar fish in the rio Uruguay have been found which do not develop such a black tail. Thus, identification of this species is difficult because some populations are very similar in appearance to M. cottoides. Accurate identification requires analysis of body proportions. See Souza-Shibatta et al. PLoS ONE 13(7): e0199963.
General Remarks This species was collected originally from the rio Ijuí, a tributary of the middle rio Uruguay, Rio Grande do Sul, Brazil. Since then, Microglanis populations collected from the rio Uruguay drainage and previously believed to be M. cottoides have been shown genetically to be indistinguishable from M. malabarbai. Similar fish have been collected in the rio Sali and may be the same species.
Hop to next section Habitat Information
Distribution South America : known only from the Rio Ijuí, a tributary of the middle Rio Uruguay, Rio Grande do Sul, Brazil.
La Plata, Uruguay, Middle Uruguay, Ijuí (click on these areas to find other species found there)
La Plata, Uruguay, Middle Uruguay (click on these areas to find other species found there)
Mar Chiquita, Dulce, Sali (click on these areas to find other species found there)

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IUCN Red List Category Not Evaluated
Hop to next section Husbandry Information
Furniture Per the original description, all specimens of M. malabarbai were caught under dead tree branches and leaves in dark water, lentic stretches of shallow streams, with sand and mud on the bottom, and moderate amount of riparian vegetation. The rio Ijuí drainage is surrounded mainly by soybean, wheat, and pasture plantations, with narrow areas of original vegetation on stream margins.
Compatibility Other species collected in same habitat with M. malabarbai were: Cichlasoma dimerus, Crenicichla scotti, Heptapterus mustelinus, Hisonotus sp., Rhamdia quelen and Rineloricaria sp.
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Neotropical Ichthyology v. 3 (no. 1), pp 62, Fig. 2.
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Last Update 2021 Sep 01 14:59 (species record created: 2011 Sep 19 05:48)