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Lopes MLBG et al 2024 (4)

Abstract: The genus Pseudacanthicus encompasses eight recognised species so far: P. histrix, P. serratus, P. spinosus, P. fordii, P. leopardus, P. pitanga, P. pirarara, and P. major. Only P. pirarara has been formally described from the Rio Xingu basin. To address this gap in taxonomic knowledge of the region, a new species of the Pseudacanthicus is described here, aimed at enhancing our understanding of the genus within the Rio Xingu basin and contributing to conservation efforts, (Lopes MLBG et al 2024). Description: This species has a lower maximum number of teeth in premaxilla and dentary; and other osteological characters. Colouration: It can be promptly diagnosed from congeners by the colour pattern of the body dark brown to black with light gray vermicular spots on the dorsal and ventral surfaces, and fins, (Lopes MLBG et al 2024). Habitat: The new species is primarily found downstream the impact zone of the Belo Monte Hydroelectric Power Plant, (Lopes MLBG et al 2024). Aquarium Care: Pseudacanthicus can be highly territorial especially when adult, so a large aquarium of at least 5ft (150cm) would be beneficial to this species. Provide plenty of shelters in the aquarium and line -of- sight barriers if more than one species is kept. Diet: As with all of this genera they are carnivores and would need to be fed on frozen foods such as Artemia, mosquito larvae, mysis and shrimp. They can also be fed pellet and tablet foods. Etymology: The specific epithet nyktos derives from Greek meaning “night”, in allusion to the dark colour of the specimens in comparison with other species of the genus and also to the deep locations where they can be found, where there is no light. An adjective, (Lopes MLBG et al 2024).

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Loricariidae

Brazil: Downstream of the impact zone of the Belo Monte Hydroelectric Power Plant.

19.0cm. (7½ins)

25-29°c (77-85°f)

6.0-7.5.

Fish in the News 2024.
Lopes MLBG, Sousa LM, Chamon CC. New species of Pseudacanthicus (Siluriformes: Loricariidae) from the rio Xingu, Amazon, Brazil. Neotrop Ichthyol. 2024.