Hypsolebias Radiseriatus (Hypsolebias radiseriatus) is a ray-finned fish of the family Rivulidae. It inhabits freshwater waters. This species can reach a maximum total length of 4.7 cm. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Endangered on the IUCN Red List.
Dorsal soft rays (total): 15 - 25; Anal soft rays: 19 - 24; Vertebrae: 29 - 30. Distinguished from all members of Hypsolebias flavicaudatus complex by having a series of light golden to light blue short lines between the sub-distal portion of the dorsal-fin rays in males (vs. never a similar color pattern). The following combination of characters can be useful to diagnose from other members of the complex: 4-6 dorsal fin filaments, tips in much surpassing posterior margin of caudal fin; a triangular bluish white spot on the anterior portion of the dorsal-fin base in males; largest spot on the centre of the flank in females about equal to eye in size; pre-pelvic length 44.3-47.7% SL in males and 49.5-54.9% SL in females; anal-fin base in males 36.9-41.4% SL; head length in males 29.2-31.4% SL; body depth in males 37.9-40.4% SL; caudal peduncle depth in males 13.6-15.4% SL .: short and / or deep; Cross section: compressed.
Behavioural data for Hypsolebias Radiseriatus is currently being reviewed.
Freshwater; benthopelagic. Tropical South America: floodplains of Verde Grande River, São Francisco River basin in Brazil.
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