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Johnny Jensen's Photographic Library (2) Chuctaya J, et al 2023 (3)

Description: Rhyacoglanis, a new genus of the South American freshwater catfish family Pseudopimelodidae is described from cis-Andean portions of the continent. Rhyacoglanis is distinguished from other genera of the family 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. Species of Rhyacoglanis are rheophilic and strongly associated with rapids and other swift-flowing waters. A phylogenetic analysis based on 41 morphological characters yields a hypothesis of monophyly of the Pseudopimelodidae and Rhyacoglanis. Pimelodus pulcher Boulenger, 1887, from the western Amazon basin is designated as type-species of the new genus and redescribed. Four new species are described: Rhyacoglanis annulatus, from the río Orinoco basin, with a nearly ringed dark band on the caudal peduncle, and a larger distance between anus and anal-fin origin; R. epiblepsis, from the rio Madeira basin, with numerous dark spots scattered on the body, and rounded caudal-fin lobes; P. paranensis from the upper rio Paraná basin, with three distinct dark bands on the body, and 31-33 total vertebrae; and R. seminiger, from the rio Juruena basin, with subdorsal and subadipose dark bands fused anteroposteriorly, and a separate dark band on the caudal peduncle. Aquarium Care: Predatory in the aquarium towards fish that are smaller. Provide plenty of hiding places to hide during the day and best kept in a small group of 2-3. Very secretive in its surroundings. Diet: No problem with eating all types of aquarium fare, flake, tablets, pellets, live and frozen foods.

None

Pseudopimelodus pulcher

Pseudopimelodidae

South America: Peru: Rio Madre del Dios drainage.

9.0cm. (3½ins) T.L.

24-28°C (75-83°F)

6.0-7.5.

Boulenger, FZS, 1887 "An Account of the Fishes collected by Mr. C Buckley in Eastern Ecuador" (Proceedings of the Scientific Meetings of the Zoological Society of London, P. 276).
Chuctaya J, Shibatta OA, Encalada AC, Barragán KS, Torres MdL, Rojas E, et al. (2023) Rediscovery of Rhyacoglanis pulcher (Boulenger, 1887) (Siluriformes: Pseudopimelodidae), a rare rheophilic bumblebee catfish from Ecuadorian Amazon. PLoS ONE 18(7): e0287120.
Shibatta, Oscar A. & Vari, Richard P., 2017 "A new genus of Neotropical rheophilic catfishes, with four new species (Teleostei: Siluriformes: Pseudopimelodidae)" (Neotropical ichthyology, Neotropic ichthyol., Vol.15 no.2).
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