All Fishes ⇒ Pseudopimelodidae ⇒ Rhyacoglanis  |  | 

  • Rhyacoglanis annulatusHolotype, 42.5mm SL
  • Rhyacoglanis annulatusHolotype, dorsal view
  • Rhyacoglanis annulatusHolotype, ventral view
  • Rhyacoglanis annulatusPectoral spine, dorsal view
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Scientific Name Rhyacoglanis annulatus    Shibatta & Vari, 2017
Common Name
Type Locality Raudales de Atures, at Culebra, approximately 7 km S of Puerto Ayacucho, río Orinoco basin, Amazonas, Venezuela, approximately 05°35'N, 67°31'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 specific epithet annulatus, from the Latin adjective annularis = ringed, referring to the caudal peduncle band forming a dark ring with a light inner region.
Hop to next section Species Information
Size 43mm or 1.7" 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.
Hop to next section Habitat Information
Distribution
Orinoco (click on these areas to find other species found there)

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IUCN Red List Category
Data Deficient
, range map and more is available on the IUCN species page. Last assessed 2020.
Hop to next section Husbandry Information
Furniture See general remarks. Rhyacoglanis likely prefer well-aerated water with significant current over a substrate of rocks, pebbles and sand.
Breeding Unreported.
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Neotropical Ichthyology v. 15 (no. 2) e160132, pp 5, Figs. 2, 3a.
Registered Keepers There is no registered keeper.
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Last Update 2025 Jan 01 12:22 (species record created: 2017 Jun 13 08:23)