Hymenocephalus aeger Gilbert & Hubbs, 1920
Plaintail whiptail

Family:  Macrouridae (Grenadiers or rattails)
Max. size:  12.7 cm TL (male/unsexed)
Environment:  bathypelagic; marine; depth range 430 - 527 m
Distribution:  Western Pacific: from off NW-Australia, off southern New Guinea and off the Solomon Islands.
Diagnosis:  This species is distinguished by the following characters: 8 pelvic-fin rays; 13-15 pectoral-fin rays; 19-23 gill rakers; the barbel is long, 20-25% HL, reaching beyond a vertical through anterior rim of orbit; orbit 35-40% HL; obtuse snout is slightly protruding, 15-18% HL; ventral striae extending to about ? the distance from pelvic fin bases to periproct; long infraorbital supporter, 70-90% OD; otolith compressed, OL:OH = 0.9-1.0; fused colliculi; long pseudocolliculum, TCL:PCL = 1.25-1.45 (Ref. 98298).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless
Country info:  Type locality, between Gillolo and Makyan Island, USNM 78228 (holotype of Hymenocephalus striatissimus aeger) (Ref. 75154).


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