Diacyclops languidoides (Lilljeborg, 1901) s.l. and Acanthocyclops montana, new species (Copepoda, Cyclopoida), from groundwater in Montana, USA


Reid J. W. 1, Reed E. B.2, Ward J. V. 3, Voelz N. J. 3 & Stanford J. A. 4
Hydrobiologia, 218: 133-149. 1991



ABSTRACT

Species of cyclopoid copepods collected from wells on the floodplains of the Flathead and Withe fish Rivers, State of Montana, U.S.A. included Diacyclops languidoides s. l. and Acanthocyclops montana, new species. New records of D. languidoides, recorded for the first time from the U.S.A., are also given from Colorado and Saskatchewan. The first complete description of a North American member of the D. languidoides species-complex is furnished. Acanthocyclops montana most resembles A. phreaticus, but differs in proportions of the caudal setae, terminal spines of leg 4 endopodite 3, and details of the seminal receptacle.



1. Department of Invertebrate Zoology, MRC-163, National Museum of Natural History
Smithsonian Institution, Washington, DC 20560 USA e-mail: reid.janet@nmnh.si.edu
2. 1901 Stover Street, Fort Collins, Co 80525, U.S.A.
3. Department of Biology, Colorado State University, Fort Collins, Co 80523, U.S.A.
4. Flathead Lake Biological Station, University of Montana, Polson, MT 59860, U.S.A.


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