| Rivulidae (Rivulines), subfamily: Rivulinae |
| 3.11 cm SL (male/unsexed); 2.76 cm SL (female) |
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benthopelagic; freshwater |
| South America: known only from the type locality in the Cocal River floodplains, Maranhão River drainage, upper Tocantins River basin in Brazil. |
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Dorsal soft rays (total): 8-10; Anal soft rays: 12-14. Belongs to the subgenus Melanorivulus by having all the subgeneric synapomorphic characters: short and pointed dorsal portion of preopercle; melanophores concentrated on opercular region to form oblique stripes; melanophores concentrated on margins of unpaired fins in females; black spot on upper portion of caudal-fin base not close to fin margin in females. Differs from all other species of Melanorivulus by the following characters: lack or extreme reduction of pelvic fins and pelvic girdle; vomerine teeth 5-7; and basihyal width about 70% basihyal length (Ref. 75171). |
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Data deficient (DD); Date assessed: 18 May 2022 Ref. (130435)
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| harmless |
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