Oneirodes basili Pietsch, 1974

Family:  Oneirodidae (Dreamers)
Max. size:  15.9 cm SL (female)
Environment:  bathypelagic; marine; depth range 700 - 1400 m
Distribution:  Eastern Central Pacific: Mexico.
Diagnosis:  Dorsal soft rays (total): 5-6; Anal soft rays: 4-4. Characterized by having escal morphology: esca with filamentous, branched anterior appendage two times length of escal bulb, without internal pigment; presence of spots of dark pigment on most branches of anterior appendage; absence of medial escal appendage; rounded or conical terminal escal papilla with two bilaterally placed distal spots of pigment; posterior escal appendage, as long as escal bulb, with an anteroposteriorly compressed distal end, posterior surface of which is slightly concave and darkly pigmented; absence of lateral escal appendage; two pairs of filamentous anterolateral escal appendages; inner pair of branched tapering appendages flanking anterior appendage, each less than one-half length of escal bulb; long and narrow subopercle, dorsal end tapering to a point, without indentation on posterodorsal margin; length of ventral fork of opercle 25.3-28.6% SL; ratio of lengths of the dorsal and ventral forks of opercle 0.54-0.62; absence of epibranchial teeth; presence of teeth on pharyngobranchial II; upper jaw teeth 49-69, lower jaw teeth 46-60; teeth on vomer 4-8; dorsal fin rays 5-6; anal fin rays 4; pectoral fin rays 15-16; head length 38.9-43.4% SL; head depth 37.7-41.7% SL; premaxilla length 32.2-33.3% SL; length of lower jaw 42.1-44.3% SL; length of illicium 45.9-51.6% SL (Ref. 86949).
Biology: 
IUCN Red List Status: Data deficient (DD); Date assessed: 11 October 2018 Ref. (130435)
Threat to humans:  harmless


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