| Corumbataia | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Loricariidae |
| Subfamily: | Hypoptopomatinae |
| Tribe: | Otothyrini |
| Genus: | Corumbataia Britski, 1997 |
| Type species | |
| Corumbataia cuestae Britski, 1997 |
|
| Binomial name | |
Corumbataia is a genus of catfishes (order Siluriformes) of the family Loricariidae. It includes four species, C. britskii, C. cuestae, C. tocantinensis, and C. veadeiros.[1]
Contents |
C. cuestae occurs in small streams of the Tietê River (upper Paraná River basin), and C. tocantinensis occurs in the Araguaia and Tocantins Rivers. C. britski is from small tributaries of the Sucuriú River, upper Paraná River Basin, Mato Grosso do Sul State, Central Brazil.[2] C. veadeiros is known from tributaries of the Rio das Almas and the Ribeirão dos Bois, both of which are tributaries of the Rio Paranã, in the headwaters of the Rio Tocantins basin, Goiás, central Brazil.[1]
These species range in size from about 2.7–3.8 centimetres (1.1–1.5 in) SL.[1][3][4][5]
C. cuestae and C. tocantinensis were described to be differentiated by counts of premaxillary and dentary teeth. However, they also differ in color pattern, as the unbranched caudal fin rays of C. britskii and C. tocantinensis lack the striped pattern present in C. cuestae.[2]
Corumbataia species exhibit sexual dimorphism. Males differ from females by presenting a developed urogenital papillae posterior to the anus, a skin fold at the dorsal portion of the pelvic fin spine, and a much longer pelvic fin spine that extends over the first anal fin ray. In C. britskii, males also differ from females by having four white blotches on the caudal fin, two at the dorsal lobe and two at the ventral lobe. Females, on the other hand, present only two white blotches, one on each lobe.[2]
C. britskii was sampled in deforested areas in moderate to fast current streams. It associates with aquatic macrophytes or the submerged portion of marginal vegetation. In its gut contents were found filamentous blue-green algae, chlorophytes, diatoms and bark.[2]