PlanetCatfish.com - Rhyacoglanis varii (Pseudopimelodidae) Cat-eLog

Holotype, 67.1 mm SL
Holotype, dorsal view
Holotype, ventral view
Paratype, live
Pectoral-fin spine, dorsal view. Bar = 1.0 mm

Cat-eLog Data Sheet
Scientific Name	**Rhyacoglanis varii** Shibatta & Souza-Shibatta, 2023
Common Name
Type Locality	Rio do Peixe, Goianésia, upper Rio Tocantins basin, Goiás, Brazil, 15°28'23.8"S, 49°13'28.9"W.
Etymology	Rhyacoglanis, from the Greek rhyax = torrent + glanis = catfish; indicating a catfish inhabiting running waters in reference to the habitat of the genus. Gender masculine. The species name varii honors ichthyologist Richard P. Vari for his outstanding contributions to the systematics of Neotropical fishes.
Species Information
Size	69mm or 2.7" SL. Find near, nearer or same sized spp.
Identification	Rhyacoglanis is distinguished from other Pseudopimelodidae by three synapomorphies: presence of a light blotch on the cheek; a connection between the middle of the dark caudal-fin stripe and the dark caudal-peduncle pigmentation; and 30-35 total vertebrae. A key to the species is located HERE.
Habitat Information
Distribution	South America: upper Rio Tocantins basin, Goiás, Brazil. Amazon, Lower Amazon, Tocantins, Upper Tocantins (click on these areas to find other species found there) Login to view the map.
IUCN Red List Category	Not Evaluated
Other Parameters	In the wild, this species was collected in clear flowing waters over rocks, pebbles, sand and leaf litter. Local water parameters: Dissolved oxygen 8.3 mg/L, pH 8.06, conductivity 83.4μS/cm, and temperature 22.5° C.
Husbandry Information
Furniture	See general remarks and Other parameters. R. varii inhabits cool, well-aerated water with significant current over a substrate of rocks, pebbles and sand.
Breeding	Unreported.
Breeding Reports	There is no breeding report.
Further Information
Reference	Neotropical Ichthyology v. 21 (no. 1): e220075, pp Figs. 1-5.
Registered Keepers	There is no registered keeper.
Wishlists	Love this species? Click the heart to add it to your wish list. There is no wish to keep this species.
Spotters	Spotted this species somewhere? Click the binoculars! There is no record of this fish being seen.
Forum BBCode

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	Look up R. varii on Encyclopedia of Life
	Look up R. varii on Global Biodiversity Information Facility
	LFS label creator ARN ref:1.31.1297.8726
Last Update	2025 Jan 01 12:23 (species record created: 2023 Feb 19 20:31)