Dorsadena yaquinae 



Coleman and Nafpaktitis, 1972 



Fig. \46— Dorsadena yaquinae. holotype, 77.0 mm. From Coleman and Nafpaktitis 



(1972, p. 3, fig. 1). 



Description 



As I have seen no study material of this species, the following data are taken entirely from 

 Coleman and Nafpaktitis, 1972. 



D. 14-15; A. 12-14; P. 15-16; AO 5-7 + 3-5, total 9-11; gill rakers (4) 5 + H- 11, total 17 

 (16); vertebrae — no data. 



Dn absent; Vn very small, poorly developed. Body photophores generally small and not 

 well defined (in preserved specimens). PLO slightly before a vertical from pectoral origin. 

 PVO, and PVOj in a near vertical line; PVOj close to middle of pectoral base. PLO, VLO, 

 SA0,-5, and Pol respectively about their diameters below lateral line. Six to 8 PO, variably 

 spaced in a wavy line; 3 to 5 (usually 4) VO, none elevated. SAO series in very wide angle, a 

 line through SAO, and SAO. passing behind SAO^ and near vent. First and last AOa in- 

 terspaces occasionally enlarged; first or last AOa, or both, slightly elevated. Pol under base of 

 adipose fin. Prc,.j interspace less than a photophore diameter; Pre, slightly lower than Prc^; 

 Prc3 well behind a vertical from PrC:.. and at or near end of lateral line; 1 or 2 additional Pre 

 near dorsal procurrent caudal rays. 



Supracaudal and infracaudal luminous glands small, undivided, equal in size, and ap- 

 posed, their length 1.6 to 2.0 times in orbital length. Each gland framed in dark tissue; most of 

 the luminous tissue is covered posteriorly by a darkly pigmented hood. Next to the dorsally 

 displaced Pre, the most definitive character is an undivided luminous gland about equal to the 

 orbital length, extending from anterior end of base of adipose fin to nearly midway to end of 

 base of dorsal fin, the gland outlined by black pigment with luminous tissue bulging dorsally. 

 Many minute secondary photophores on head, body, and anterior part of caudal fin, and in 

 rather regular vertical patterns on scale pockets along lateral line. 



Size.- To about 100 mm. 



Least depth of capture: To 180 m at night. 



Distribution: Only five specimens known, taken from a small area of the North Pacific 

 Ocean bounded by about 44° to 45° N, 134° to 139° W. 



Lampanyctodes Fraser-Brunner, 1949 



The 8 to 10 procurrent caudal rays are stiff and spine-like. Dn, if present, modified into a 

 thin, elongate patch of luminous tissue between anterior portion of supraorbital bone and 

 orbital margin and extending downward nearly to nasal rosette; Vn round, deeply embedded. 

 PVO, before and nearly level with PVO:. — a condition similar to that found in the primitive 



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