Diaphus luetkeni 



(Brauer, 1904) 



Fig. 92 — Diaphus lutkeni, male, 54.6 mm. 



Description 



D. 16; A. 15 (16); P. 11; AO 6 (5-7)+ 5 (4-6), total 11 (10-12); gill rakers 6-7 + 1 -H 14 

 (13-15), total 22 (20-23); vertebrae 35 (34-36). 



SAO in a straight or very slightly angulate line, the SAOo.i interspace nearly twice that of 

 SAOi.o. First AOa elevated to about level of SAOj. Dorsal and anal bases overlap considerably. 

 The elongated Vn of females is much narrower than that of males (Fig. 92) but has distinct, 

 though usually smaller, "knobs" protruding into the orbital rim. 



Size: To about 60 mm. 



Least depth of capture: To about 90 m at night. 



Distribution: In the eastern Pacific, D. luetkeni is known only from a rather narrow sector 

 of the tropical area (Fig. 87); it has not been taken in the extreme eastern sector despite 

 considerable collecting effort. 



Diaphus diadematus 



Taning, 1932 



Fig. 93 — Diaphus diadematus , male, 24.0 mm. 



107 



