WING: ELLOBIOPSIDAE FROM NORTH PACIFIC 



0.5 1 



^-r I  I  I  I  I  I  I  I  I  i 



1 MM 



Figure 6. — Ellobiocystis sp.? on mouth parts of the amphipod Rhachotropis helleri. A. Palp of first maxilla. B. Mandibular palp. 



C. and D. Maxilliped palps. 



of the northeastern Pacific during all seasons of 

 the year. 



7. Thalassomyces californiensis is found on 

 P. emarginata from southern California. 



8. Ellobiopsis chattoni is found on the copepod 

 Metridia longa from Auke Bay, Alaska, from July 

 through December; peak abundance is in late 

 October and early November. Pseudocalanus 

 minutus is also a host oiE. chattoni. 



9. Ellobiocystis caridarum is found in a wide 

 variety of growth forms on Pasiphaea pacifica 

 from southeastern Alaska during all seasons of 

 the year. Incidence of infestation hyE. caridarum 

 may be as high as 84% of the Pasiphaea. This 

 is the first report of £. caridarum from the North 

 Pacific. 



10. A small epibiont resembling .E. caridarum 

 has been found on the mouth parts of the amphi- 

 pod i?/iac/io<ropis helleri from Auke Bay, Alaska. 



11. Known North Pacific ellobiopsids, their 

 hosts, and the geographical range of the ello- 

 biopsids are summarized in Table 6. 



ACKNOWLEDGMENTS 



I wish to express my gratitude to T. H. Bowman 

 of the U.S. National Museum for the loan of the 



holotype of Thalassomyces albatrossi n.sp. and 

 identification of the amphipods and mysids found 

 as hosts of Thalassomyces spp. Correspondence 

 with S. B. Collard of the University of West 

 Florida and W. Vader of Troms0, Norway has 

 been most informative as were discussions with 

 Ethelwyn Hoffman in the early stages of the 

 study. Thanks are due also to J. Gait of the Uni- 

 versity of Washington; T. H. Butler of the Fish- 

 eries Research Board of Canada; and R. A. 

 McHardy of Southampton, England, for informa- 

 tion on recent host and range extensions of 

 several ellobiopsid species. R. E. Thorne kindly 

 supplied specimens from his Puget Sound plank- 

 ton collections. J. Campbell, Language Depart- 

 ment, University of Rhode Island, translated the 

 species diagnosis into Latin. 



LITERATURE CITED 



Bergan, p. 



1953. A note on the ellobiopsid genus Amallocystis Fage. 

 Univ. Bergen Arbok 1952, Naturvitensk Rekke 14, 19 p. 



BOSCHMA, H. 



1949. Ellobiopsidae. Discovery Rep. 25:281-314. 



1957. Ellobiopsidae. Fich. Ident. Zooplankton 65, 4 p. 



Cons. Perm. Int. Explor. Mer. 

 1959. Ellobiopsidae from tropical West Africa. Atl. Rep. 



5:145-175. 



183 



