Astroblepus rivasae Ardila Rodríguez, 2018

Family:  Astroblepidae (Naked sucker-mouth catfishes)
Max. size:  4.93 cm SL (male/unsexed); 4.39 cm SL (female)
Environment:  demersal; freshwater
Distribution:  South America: Colombia.
Diagnosis:  This species is distinguished by the following characters: adipose fin with mobile spine connected to the caudal peduncle through a membrane; preadipose membrane extended from the posterior part of the dorsal-fin terminating to the adipose-fin origin; maxillary barbel reaching to the operculum; first pectoral-fin ray larger than the head; pectoral fin with 5-6 soft branched rays associated to the third radial element; dorsal-fin spine is prolonged; first pelvic-fin ray extending beyond urogenital pore; outer row of premaxillary teeth with one bicuspid and 10-11 conical teeth; two outermost caudal-fin rays enlarged; basibranchial bone has Y-shaped inverted form; fifth ceratobranchial bone with 6 teeth in the anterior region; adipose fin located dorsal to the vertebrae 19; first anal-fin pterygiophore ventral to vertebrae 14; vertebrae 24, pleural ribs 10 (Ref. 119425).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless


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