Distribution 



Vervoort (1946) reported one female (1.80 mm) S. 

 spinosus with Mxp Bl with transverse spine-comb, in 

 that it agreed with Mxp described by Wolfenden 

 (1911) for 6'. horridus. Vervoort's specimen is con- 

 sidered to be S. usitatus. Roe (1972a, b) reported S. 

 spinosus from the east Atlantic and remarked that 

 some of them may be closely related species as 

 described by Park (1970). 



Pacific Ocean 



Northeast: Present study, 300-400 m. 



Central: Present study, 0-1,000 m. 

 Indian Ocean 



Northwest: Vervoort (1946), 555-1,000 m. 

 Atlantic Ocean 



Caribbean Sea: Park (1970), 487-1,900 m. 



38. Spinocalanus hoplites Park, 1970 



Spinocalanus hoplites Park, 1970, p. 489, fig. 55-58. 



Type Specimen: Holotype, female (1.72 mm), USNM 



123781. 



Type Locality: Caribbean Sea, 980-1,900 m. 



Material StitdieD: Holotype, female (1.72 mm) and 



3 paratypes, females (1.52, 1.60, 1.62 mm), sample 56 



(Table 3). 



Description 



PI Ri with 2 inner setae; P2 Ri2 with 1 outer seta. 



Female. — Length 1.52-1.78 mm. Similar to S. 

 spinosus except Mxp Bl with transverse spine-comb. 

 Differs from S. usitatus in that Mxp Bl spine-comb 

 on very large tubercle, and Mx2 posterior surface of 

 lobe-5 base without spines. 



Male. — Unknown. 



Remarks 



The development of a transverse spine-comb on 

 Mxp Bl, in those species where it occurs, is variable; 

 it is sometimes reduced or even lacking on Mxp of one 

 side. Likewise, the spine-comb base is more or less 

 prominent, and in S. hoplites is very pronounced. Kit 

 were not for the absence of spines on base of Mx2 lobe- 

 5, S. hoplites would be considered in this study as 

 equivalent to S. usitatus. 



Distribution 



Atlantic Ocean 



Caribbean Sea: Park (1970), 980-2,800 m. 



39. Spinocalanus aspinosus Park, 1970 



Spinocalanus aspinosus Park, 1970, p. 489, fig. 59-61. 



Type Specimen: Holotype, female (1.38 mm), USNM 



123780. 



Type Locality: Caribbean Sea, 1,004-1,850 m. 



Material Studied: 1 female (1.41 mm), sample 53 



(Table 3); holotype, female (1.38 mm), sample 54; 1 



female (1.48 mm, after Park, 1970), on slide, sample 



57. 



Description 



Pi Ri with 2 inner setae; P2 Ri2 with 1 outer seta. 



Female.— Length 1.32-1.48 mm. Similar to S. 

 hoplites except Thl-Th4 without lateral spinules. 

 Mxp Bl with transverse spine-comb on conspicuous 

 tubercle. 



Male. — Unknown. 



Remarks 



Two of the specimens examined in this study had 

 been reported as S. brevicaudatus by Park (1970). 



Distribution 



Atlantic Ocean 



Caribbean Sea: Park (1970), 980-1,900 m. 

 —Present study, 203-1,000 m. 



Grice and Hulsemann (1965) reported some .S. 

 spinosus without integumental spinules from the 

 northeast Atlantic. Probably those specimens belong- 

 ed to S. aspinosus. 



40. Spinocalanus oligospinosus Park, 1970 



(Figure 158) 



"! Spinocalanus caudatus Sars, 1920, p. 3. — Sars, 1924, 



1925, p. 31-32, pi. 8, fig. 10-17. —Rose, 1933, p. 85- 



86, fig. 45. 

 Spinocalanus oligospinosus Park, 1970, p. 491, fig. 



62-65. 

 Spinocalanus paraoligospinosus Hure and Scotto di 



Carlo, 1971, p. 584-585, nomen nudum. 

 Spinocalanus neospinosus Grice, 1971, p. 276-280, 



fig. 2A-I. 



Type Specimen: Holotype, female (1.28 mm), USNM 



123782. 



Type Locality: Caribbean Sea, 487-950 m. 



Material Studied: Holotype, female (1.28 mm), 



sample 55 (Table 3). Also the type specimen of S. 



neospinosus: holotype, female (1.30 mm), sample 47. 



59 



