L.jordani have higher values than those of L. simulator, although often with considerable 

 overlap; those proportions showing no overlap are the upper-jaw length and pectoral and 

 pelvic-fin lengths. 



Lampanyctus australis 



Taning, 1932 



Fig. 182 — Lampanyctus australis , 99.0 mm. (Photophores retouched). 



Description 



D. 13; A. 17-18; P. 14 (13-15); AO 7 (7-8) -i- 7-8, total 14 (15); gill rakers 6 (5) -h 1 -f- 

 13 (14) total 20 (19-21); vertebrae 36 (35). 



This species is easily distinguished by the single, prominent cheek photophore, by the 

 VLO close to lateral line, by the very long pectoral fin which reaches nearly to the Pol, and by 

 the very few (3-5) luminous scales in the infracaudal gland. Upper Pre over or slightly before 

 vertical from next lowest; Pre and AOp continuous. 



Size: To 102 mm. 



Least depth of capture: To 100 m at night. 



Distribution: L. australis is common and circumglobal in the southern hemisphere. In the 

 eastern Pacific, it is known from off Chile (30° to 45° S, 72° to 80° W) (Craddock and Mead, 1970; 

 Bussing, 1965). 

 Discussion 



A related species, Lampanyctus alatus Goode and Bean, 1896, is superficially very similar 

 to L. australis and the two have been confused by various authors. L. alatus is a smaller 

 species, seldom attaining 50 mm SL and it differs further in having fewer gill rakers (3-4 + I + 

 8-10, total 12-15). In the Pacific Ocean L. alatus is known only from the northern Indo-Pacific 

 region and from near Taiwan. It is common in the Atlantic, Indian and western Pacific Oceans 

 between latitudes of about 36° N and 37° S (Bolin, 1959). 



193 



