Crenicichla taikyra (Teleostei: Cichlidae), a new species of pike cichlid from the middle río Paraná, Argentina

Abstract

Crenicichla taikyra, new species, is described from the middle río Paraná, Argentina. Crenicichla taikyra is distinguished from the other species of the genus by the following combination of characters: lower pharyngeal tooth plate stout, bearing molariform teeth, ascending arm of premaxilla longer than the dentigerous arm, posterior edge of preoperculum serrated, a well developed suborbital stripe, and absence of scattered dark dots on flanks. Molariform teeth on pharyngeal jaws is a derived character among Crenicichla species, however this character state has appeared several times in unrelated species.

Teleocichla preta, a new species of cichlid from the Rio Xingu Basin in Brazil (Teleostei: Cichlidae)

“…e . durophagy (Lucena & Kullander, ; Wainwright, ; Burress et al , ; Casciotta et al , ). Congruent with this expectation, Zuanon () showed that the diet of T .…”

“…Molariform pharyngeal teeth are known in few species of different putative lineages within Crenicichla and this condition is commonly linked to the specialized consumption of hard-shelled items, i.e. durophagy (Lucena & Kullander, 1992;Wainwright, 2006;Burress et al, 2013;Casciotta et al, 2013). Congruent with this expectation, Zuanon (1999) showed that the diet of T. preta is predominantly composed of hard-shelled gastropods, bivalves and caddisfly larvae (Trichoptera: Helicopsychidae) that make protective hard cases with sand grains (Wiggins, 1996).…”

Evaluating the role of predatory fish controlling the invasion of the Asian golden mussel Limnoperna fortunei in a subtropical river

“…The report of the cichlid C. missioneira as a consumer of L. fortunei is novel, although at least two other species of the same genus were also reported as mussel consumers (e.g. Casciotta et al, ; Lopes, ; Montalto, Oliveros, Ezcurra de Drago, & Demonte, ). In the case of the small‐sized Crenicichla species (maximum size of about 25 cm), its large and protractile mouth and strong pharyngeal teeth might be the key that allows them to feed and crush smaller mussels.…”

Checklist and practical identification key for the cichlid fishes (Cichliformes: Cichlidae) of the La Plata drainage in Bolivia, including three new geographical records

“…These publications, however, do not treat C. ocellata in the main text, but merely list the holotype among the examined material (e.g. Piálek et al 2010, 2015; Casciotta et al 2013; Říčan et al 2017). In one publication, these authors list C. ocellata unter its original name Boggiania ocellata (Piálek et al 2010), indicating that the authors did not intend to recognize B. ocellata as a distinct species, but used its original name to indicate the holotype.…”