FISHERY BULLETIN: VOL. 70. NO. 4 



Lampadena sp. 



(10 occurrences, 14 larvae) 



Larvae of Lamapadena sp. were taken on the 

 three offshore lines in two groups — one occur- 

 ring between lat 3° and 8°N and the other in 

 the central water mass of the South Pacific be- 

 tween lat 7° and 10°S. A similar distributional 

 pattern was obtained on ETP I ; however, the 

 more extensive coverage of the South Pacific 

 central water mass on the earlier survey pro- 

 vided better distributional information for the 

 southern component. 



Lampanyctus spp. 



(291 occurrences, 5,334 larvae) 



Lampanyctus larvae rank second in abundance 

 and in frequency of occurrence among the myc- 

 tophid genera represented in the eastern trop- 

 ical Pacific. Lampanyctus larvae were most 

 abundant between lat 5°N and 5°S and least 

 common between lat 10° and 20°N. The six col- 

 lections of Lampanyctus larvae that contained 

 over 100 specimens per collection were taken be- 

 tween the equator and lat 5°N. Three kinds of 

 Lampanyctus larvae dominated over most of the 

 EASTROPAC pattern. Although identification 

 to the species level are tentative as yet, these 

 three kinds of larvae are almost certainly those 

 of L. idostigma Parr, L. omostigma Gilbert, and 

 L. parvicauda (Parr) — three widespread trop- 

 ical species of Lampanyctus. A quite different 

 assemblage of Lampanyctus larvae was taken in 

 the moderate number of stations occupied in the 

 South Pacific central water mass. 



with common characteristics attributed to L. 

 pyrsoholus. These workers considered Alcock's 

 poorly described L. pyrsoholus as unidentifiable. 

 Instead they identified their material with L. 

 photothorax (Parr), L. longipes (Brauer), and 

 L. indicus Nafpaktitis and Nafpaktitis. L. pho- 

 tothorax was taken in four ETP I collections 

 between lat 15° and 20°S in the offshore pattern 

 occupied by Argo. The specimens from the 

 eastern Pacific agree closely with the description 

 and illustration of this species in Nafpaktitis 

 and Nafpaktitis (1969). These workers gave 

 7 + 4 as the usual combination of AO photo- 

 phores on specimens from Indian Ocean ma- 

 terial. In the EASTROPAC area all specimens 

 examined had 6 + 4 AO photophores. 



The widely distributed species in the EAS- 

 TROPAC area is either L. longipes (Brauer) or 

 a species closely related to L. longipes. The 

 eastern Pacific form has similar luminous patch- 

 es to those described for L. longipes from the 

 Indian Ocean except for the luminous tissue on 

 the head of males and the size of the infracaudal 

 gland on some larger specimens. Luminous 

 patches developed on the head were restricted to 

 a single wide pair of luminous patches. On some 

 larger specimens the infracaudal gland began 

 under the last AO photophore and was conspic- 

 uously larger than those observed by Nafpaktitis 

 and Nafpaktitis (1969) on Indian Ocean mate- 

 rial. AO photophores were usually 5 + 4; gill 

 raker counts were 5 + 1 + 11 to 13. 



Two kinds of Lepidophanes have been ob- 

 served in the EASTROPAC area, although only 

 one kind was taken commonly. Larvae of the 

 latter have been assigned to L. longipes (?). 



Lepidophanes pyrsoholus complex 

 (36 occurrences, 138 larvae) 



Lobianchia spp" 



(10 occurrences, 15 larvae) 



An examination of the juvenile and adult spe- 

 cimens of Lepidophanes collected on ETP I has 

 shown that two closely related species are pre- 

 sent — one with a very restricted distribution and 

 the other with a widespread distribution. Naf- 

 paktitis and Nafpaktitis (1969) found three 

 species of Lepidophanes from the Indian Ocean 



Larvae of Lobiauchia, although uncommon in 

 the eastern tropical Pacific, have a fairly wide- 

 spread distribution in two separated areas: 1) 

 in an equatorial belt between lat 3°S and 6°N 

 (8 occurrences) and 2) in the transitional wa- 

 ters of the Humboldt Current. In the latter area, 

 two occurrences were recorded at about lat 12° 



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