Melamphaes pachystomus Kotlyar, 2011

Family:  Melamphaidae (Bigscale fishes or ridgeheads)
Max. size:  7.15 cm SL (male/unsexed)
Environment:  bathypelagic; marine; depth range 900 - 1000 m
Distribution:  Southeast Pacific: Peruvian coast.
Diagnosis:  Dorsal spines (total): 3-3; Dorsal soft rays (total): 14-15; Anal spines: 1-1; Anal soft rays: 8-8; Vertebrae: 28-29. The species is characterized by the following: first gill arch with 22 rakers; total vertebrae 28-29, 11 abdominal and the haemal arch of the first caudal vertebra is without a spur; D III,14-15; P15; ventral fin with 7 soft rays; ventral fin starts under the vertical line of the posterior margin of the pectoral fin basement; anal fin starts after the vertical line of the last ray of the dorsal fin; operculum with 4 scales (Ref. 87970).
Biology: 
IUCN Red List Status: Data deficient (DD); Date assessed: 30 December 2019 Ref. (130435)
Threat to humans:  harmless


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