Hypsolebias nudiorbitatus Costa, 2011

Family:  Rivulidae (Rivulines), subfamily: Cynolebiinae
Max. size: 
Environment:  benthopelagic; freshwater
Distribution:  South America: Upper Itapicuru River basin in northeastern Brazil.
Diagnosis:  Belongs to the Hypsolebias antenori species group, differing from all congeners of this group by having a rudimentary squamation on the supra-orbital region, a unique color pattern on the caudal fin in males consisting of white dots arranged in transverse rows, 14 scale rows around the caudal peduncle, the dorsal fin slightly more posteriorly placed in males and the basihyal bone narrow (Ref. 88806).
Biology: 
IUCN Red List Status: Data deficient (DD); Date assessed: 07 November 2018 Ref. (130435)
Threat to humans:  harmless


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