Description

Dorsal spines (total): 0; Dorsal soft rays (total): 10; Anal spines: 0; Anal soft rays: 14; Vertebrae: 39 - 40. Diagnosis: This species differs from all other alestid and all other characiform species in having supposed adults with greatly enlarged conical teeth in two rows on the premaxillary and on the dentary (Ref. 123194). Mouth slightly upturned; jaws short, entirely anterior to eyes; teeth with large round base and sharp slightly recurved tip, evidently specialized for puncturing (Ref. 123194). Head and body laterally compressed, slender; circumorbital bones absent; scales absent; postcephalic laterosensory system absent (Ref. 123194).

Common Names

No common names available.

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Chordata

Class: Teleostei

Order: Characiformes

Family: Alestidae

Genus: Alestion

Species: Alestion rapax Roberts, 2019

Climate Zone

Location

Biology

Found in river with maximum depth about one meter, width of river 40m; water turbid; bottom sand and gravel; with dense cover provided by Vossia and other aquatic plants on one side of channel (Ref. 123194). Stomach contents appear to be exclusively insect remains (Ref. 123194).

Habitat

benthopelagic