COPEPODA FROM IFALUK ATOLL 359 



The genus Onychocamptus Daday, in the sense of Lang (1948, 

 p. 1415), makes a very heterogeneous impression and subsequently 

 has been reduced by Noodt (1958, p. 94) by the removal of the former 

 "khei" group, which at the same time received generic rank and now 

 is known as the genus Klieonychocamptus Noodt, 1958. The next 

 step would be to remove the "horridus" group, characterized by the 

 6-segmented antennules in the female and the strongly spinulose body 

 of both sexes. A generic name for this group, indeed, has already 

 been introduced by Nicholls (1941b, p. 95), who suggested the generic 

 name Echinolaophonte, a name which cannot be recognized until a 

 type species has been indicated by Dr. Nicholls. I have therefore 

 left the "horridus" group in the genus Onychocamptus, hoping the 

 indication of a type species for Echinolaophonte will soon be arranged.* 

 The generic name Onychocamptus Daday, 1903, will then only apply 

 to Lang's "mohammed" group. 



Onychocamptus armiger (Gurney, 1927) 



Figures 142, 143, 144a, 146c-e 



Laophonte armiger Gurney, 1927, p. 554, fig. 159.— Sewell, 1940, pp. 313, 359, 



367, 368. 

 Onychocamptus armiger. — Lang, 1948, p. 1423, figs. 571 (no. 2), 580. — Carvalho, 



1952, p. 159, pi. 2 (figs. 68-71).— Petkovski, 1955, p. 126. 

 Laophonte hystrix Brian, 1928, pp. 30, 37, figs. 130-142. 

 Laophonte steueri van Douwe, 1929, pp. 286, 291, figs. 16-21. 



Material. — Loc. 589, 1 ad. cf, 0.59 mm. Loc. 590, 1 ad. 9, 

 0.51 mm. 



Description. — The following is based on the above-mentioned 

 specimens; both have been dissected and mounted. 



Adult female, total length 0.51 mm.; greatest diameter 0.16 mm.; 

 length of longest furcal seta 0.14 mm. 



Body of very characteristic appearance, which cannot possibly be 

 described in detail but can best be appreciated by reference to figures 

 I4:2a,b. Body depressed dorsoventrally; head and 1st thoracic 

 somite fused to form cephalic somite, which, with rostrum, is % total 

 body length. Cephalic somite swollen, on each side with big, rounded 

 lateral swelling. Here body reaches greatest diameter; posteriorly it 

 narrows very gradually; demarcation between cephalo thorax and 

 abdomen very indistinct; genital area slightly dilated (fig. 142a). 

 Between lateral swellings cephalic somite distinctly depressed in 

 middorsal line; pit bordered by irregularly chitinized ridges and, 



•I am sorry that I have overlooked Nicholls' legitimate indication of a type for the genus Echinolaophonte 

 (Nicholls, 1941b, p. 95), the type being Cleta horrida Nonnan, 1876. The genus Echinolaophonte Nicholls, 

 1941, therefore, has a legitimate standing. Its species are: Cleta horrida Norman, 1876; Laophonte bretispinoaa 

 G. O. Sars, 1908; Laophonte armiger Gurney, 1927; Laophonte mirahilis Quniey, 1927; and the species described 

 here as Onychocamptus gladiator; in addition, Laophonte horrida var. trispinosa Lang, 1936, belongs In the 

 genus. 



646-471—64 24 



