Poromitra rugosa (Chapman, 1939)

Family:  Melamphaidae (Bigscale fishes or ridgeheads)
Max. size:  9.4 cm SL (male/unsexed)
Environment:  bathypelagic; marine; depth range 708 - 886 m
Distribution:  Northeastern Pacific: known only from two catches from 708-886 m. Other possible catches were attributed to P. crassiceps.
Diagnosis:  Dorsal spines (total): 3-3; Dorsal soft rays (total): 12-12; Anal spines: 7-7; Anal soft rays: 9-9; Vertebrae: 27-27. This species is distinguished by its spinulated (without gap) posterior and lower edges of praeoperculum; insertion of ventral fins located slightly behind the vertical of posterior edge of pectoral fin insertion; upper jaw extends to the vertical of posterior eye edge; soft rays in dorsal fin 12, in anal fin 9; 31 rakers at the first gill arch; 27 vertebrae (Ref. 83717).
Biology: 
IUCN Red List Status: Data deficient (DD); Date assessed: 30 December 2019 Ref. (130435)
Threat to humans:  harmless


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