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Erling Holm (3)

Aquarium Care: This of course is a predator which needs plenty of hiding places such as pipes and caves, as they like to hide during the day. The tank should be moderately lit with floating plants to keep the light down. A gravel substrate is recommended. Generally the genus Cephalosilurus is considered as very territorial, this particularly applies to the intra species aggressiveness. This is one of the smallest members of this genus so will not be so problematic to keep with other species. Diet: Will only eat live foods when first introduced to the aquarium but can be weaned off this and fed with shrimps, worms, thawed out smelt, fillets of fish and tablet foods. The species depicted was collected by the image contributor in the Potaro River, Guyana and occurred over sand and gravel partially covered with mud, leaves and dead wood. Update Dec. 2021: (Shibatta, Oscar A. et al, Abstract) Lophiosilurus is a monotypic genus represented by L. alexandri, a species endemic to the São Francisco river basin, Brazil. In previous phylogenetic analyses, the genus has been recovered as the sister group of Cephalosilurus. However, few species of Cephalosilurus or few characters were included in those studies. Thus, the current study aims to test the monophyletic hypothesis of the genera Lophiosilurus and Cephalosilurus with a more comprehensive phylogenetic analysis, including all Cephalosilurus species and a representative number of characters. Phylogenetic analyses of 18 terminal taxa (15 ingroups and three outgroups) were conducted based on a combined 75 character matrix, including 70 discrete morphological characters concerning osteology and neuroanatomy, four continuous characters, and the geometric morphometry of the head. The monophyly of the family Pseudopimelodidae was highly supported, and Cephalosilurus is synonymized with Lophiosilurus. The recovered phylogeny of the genus was (L. albomarginatus , L. nigricaudus, L. apurensis, L. fowleri, and L. alexandri). Remarks: Lophiosilurus albomarginatus is still found on some online searches as Cephalosilurus albomarginatus.

None

Pseudopimelodus albomarginatus, Cephalosilurus albomarginatus

Pseudopimelodidae

South America: Tukeit, Guyana. Type locality: Tukeit, British Guiana.

8.5cm. (3½ins)

23-25°C (73-77°F)

6.5-7.5.

Froese, R. and D. Pauly. Editors. 2017. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 10/20/17 ).
Oscar A. Shibatta, Lucas R. Jarduli, Vitor P. Abrahão & Lenice Souza-Shibatta. (2021). Phylogeny of the Neotropical Pacman catfish genus Lophiosilurus (Siluriformes: Pseudopimelodidae). Neotrop. ichthyol., 19 (4).
Shibatta, O.A., 2003. Pseudopimelodidae (Bumblebee catfishes, dwarf marbled catfishes). p. 401-405. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.