Myctophum lychnobium 



Bolin, 1946 



Fig. 51 — Myctophum lychnobium. female, 98.0 mm. 



Fig. 52 — Myctophum lychnobium. From Sarenas (1954, p. 411, fig. 9) (sex not stated.) 



Description 



D. 13 (12-14); A. 19 (17-20); P. 15-16 (14-17); AO 7 (6-8) + 7 (6-8), total 14 (12-16); gill 

 rakers 6-7 (8) -K 1 -I- 14-15 (13-17), total 22 (20-24); vertebrae 38 (37-39). 



Exposed margins of scales strongly ctenoid. One to three serrations on the scales over the 

 AO series, and often over ventral midline, are markedly elongated into spines which project 

 posteriorly. Upper opercular margin serrate. One, rarely 2, AOpover anal base. SAO series 

 usually straight and in a steep angle (about 60°). SAO, over VO4. AOa, over fourth to sixth 

 anal ray base; A0ai.2 interspace greater than those of remaining ones of series. Forebody deep, 

 4 in SL. Body color very dark brown or black in preservative. Males of about 60 mm begin to 

 develop 6 to 8 luminous scales in the supracaudal gland and females of about 50 mm begin to 

 develop from 1 to 4 scales in the infracaudal gland. 



Size: To about 116 mm. 



Least depth of capture: At surface at night. 



Distribution: Known from tropical waters from eastern Pacific (Fig. 53) to Mozambique 

 Channel, Indian Ocean. 



Discussion 



See M. spinosum. 



58 



