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Wallaciia
''Wallaciia'' is a South American genus of cichlids from the tribe Geophagini. The genus was only erected in mid-2023 by four South American ichthyologists and their Swedish colleague Sven O. Kullander. It was named in honour of the British naturalist Alfred Russel Wallace, and is a near-tautonym of the chosen type species. Previously, the species placed in ''Wallaciia'' belonged to the genus ''Crenicichla'' and formed the ''Crenicichla wallacii'' species complex. The genus ''Wallaciia'' occurs in the Amazon Basin from the Rio Madeira to the Rio Tocantins, but is absent west of Santo Antônio do Içá or the mouth of the Río Putumayo into the Amazon. The genus is also found in the drainage basins of the Orinoco and the Essequibo. Description Like all pike cichlids, ''Wallaciia'' species have a pike-like, elongated body. The number of vertebrae is high and there are more trunk vertebrae than tail vertebrae, while in most other cichlid genera it is the other way round. ''Wal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geophagini
Geophagini is a Tribe (biology), tribe of cichlids from the subfamily Cichlinae, the American cichlids. It is the sister taxon to the clade which includes the Cichlasomatini and Heroini. Fishes in the Geophagini are distributed from Panama south to Argentina, it is the most speciose of the seven tribes within the Cichlinae and it is subdivided into three sub-tribes, Acarichthyina, Crenicaratina, and Geophagina which together contain over 200 species. Geophagines show morphological and behavioural specialisations to enable them to sift the substrates within their mouths so that they can separate benthic invertebrates from substrates dominated by sand or silt. Classification The Geophagini are classified as follows: * Subtribe Acarichthyina Sven O. Kullander, Kullander, 1998 ** Genus ''Acarichthys'' Carl H. Eigenmann, C. H. Eigenmann, 1912 ** Genus ''Guianacara'' Kullander & Han Nijssen, Nijssen, 1989 * Subtribe Crenicaratina Kullander, 1998 ** Genus ''Biotoecus'' C. H. Eigenmann & ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crenicichla Urosema And Virgatula (middle Rio Xingu)
''Crenicichla'' is a genus of cichlids native to South America commonly known as the pike cichlids. They are found in most tropical and subtropical freshwater habitats between the Andes and the Atlantic. Description The smallest species of ''Crenicichla'' are no larger than Gottwald, J: Crenicichla arten.' and may be referred to as "dwarf cichlids" for the aquarium hobby – though their aggressive and territorial habits make them unsuitable for novice keepers. The smallest members, and formerly the ''C. wallacii'' species complex was split off to ''Wallaciia'' in 2023, along with the former ''C. saxatilis'' complex which became ''Saxatilia'' and the ''C. lugubris'' complex which became ''Lugubria''. In the same paper, one further genus was erected (''Hemeraia'') and the remaining species were divided into subgenera. The largest pike cichlids can grow to about long. Most ''Crenicichla'' measure in the range of . Like many other predatory fishes, a pike cichlid has a wide mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |