Apionichthys rosai Ramos, 2003

Family:  Achiridae (American soles)
Max. size:  3.45 cm SL (male/unsexed)
Environment:  demersal; freshwater
Distribution:  South America: lower to upper Amazon basin.
Diagnosis:  Dorsal soft rays (total): 44-56; Anal soft rays: 46-49; Vertebrae: 35-36. Lacks a gill opening on the eyed side; having 2 or 3 series of scales with rounded posterior margin and larger than other trunk scales along dorsal, anal and pelvic fin bases on the eyed side. Similar to Apionichthys asphyxiatus in the absence of a gill opening on the eyed side, but differs in its larger interorbital space that is 2 to 4 times the orbital diameter (vs. interorbital space half the orbital diameter).
Biology: 
IUCN Red List Status: Least Concern (LC); Date assessed: 09 April 2020 Ref. (130435)
Threat to humans:  harmless


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