Centrobranchus choerocephalus 



Fowler, 1904 



Fig. 77 — Centrobranchus choerocephalus. From Becker ( 1964a, p. 62, fig. 25). 



Description 



D. 10 (9-11); A. 18 (17-19); P. 15 (14-17); AO 5-6 (4 7) + 10-11 (9-12), total 15-16 (13-18); 

 vertebrae 38-39 (37-40). 



Nasal rosette oval. Body slender; least depth of caudal peduncle considerably less than 

 orbital diameter or snout length. At least 4 AOp over anal base. 



Six to 7 supracaudal and 5 (4-6) infracaudal luminous glands evident on specimens of 20 to 

 25 mm. 



Size: To about 40 mm. 



Least depth of capture: At surface at night. 



Distribution: Centrobranchus choerocephalus, the most abundant, or at least the most 

 collected, species of the genus, appears to have at least two more or less segregated groups 

 separated by about 10° of latitude at the equator, from about 05° N to at least 05° S (Fig. 74). 

 This zone, at least in the eastern Pacific, has been rather well collected, and particularly so in 

 the extreme eastern sector. Except for this break at the equator, the range of the species 

 appears to extend between the North and South Tropical Convergences. 



The Diaphid Fishes 



Genera Lobianchia and Diaphus 



l/n 

 So, 



j/Q AOai^efior /lO posterior 



Fig. 78 — Diagram of a fictitious diaphid fish showing the location and terminology of commonly occurring photo- 



phores. From Nafpaktitis (1968, p. 8, fig. 2). 



91 



