Astyanax Cubilhuitz (Astyanax cubilhuitz), first described by Soto, 2017 is a small fish in the family Acestrorhamphidae (order Characiformes). Adults typically reach 5.30 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus.
Dorsal soft rays (total): 9; Anal soft rays: 21 - 26; Vertebrae: 32 - 33. Astyanax cubilhuitz is distinguised from other congeners in north-eastern Guatemala and Belize by having body depth 35% SL or less (35% or more in A. bacalarensis and A. belizianus), eye larger, diameter 35% HL (vs. 32% or less), mean predorsal length, 52% SL (49% in A. macal and A. petenensis), mean anal-base length, 26% SL (vs. 28% or more), longest anal-fin ray, mean 17% SL (vs. 14%), upper pharyngeal plate oval in shape (crescent-shaped, in A. belizianus); and humeral spot rectangular in shape (vs. indistinct or P-shaped) .: fusiform / normal.
Behavioural data for Astyanax Cubilhuitz is currently being reviewed.
Freshwater; demersal. Tropical Central America: Río Dolores in Alta Verapaz, Guatemala.
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