Anomalomermis ephemerophagis n. g., n. sp. (Nematoda: Mermithidae) parasitic in the mayfly Ephemerella maculata Traver (Ephermeroptera: Ephermerellidae) in California, USA
A new nematode, Anomalomermis ephemerophagis n. g., n. sp. (Nematoda: Mermithidae) is described from the mayfly Ephemerella maculata Traver (Ephermeroptera: Ephermerellidae) in California. The new species is characterised by six cephalic papillae and four additional disk papillae located on the head between the cephalic papillae and stoma. Additional diagnostic characters are: a terminal mouth opening; absence of X-fibers in the cuticle of both postparasitic juveniles and adults; paired, curved, medium-sized spicules; a straight barrow-shaped vagina and large eggs. Two infectious agents were present in some specimens. This is the first description of an adult nematode from a mayfly.
The senior author thanks Jeff Stone and Gordon Beakes for comments on the identification of the possible Haptoglossa parasite. Hiromi Uno thanks the Eel River Critical Zone Observatory: National Science Foundation CZP EAR-1331940 for use of the Eel River Critical Zone Observatory and for a Moore Foundation award to the Berkeley Initiative in Global Change Biology. Larissa Walder thanks the U.C. Berkeley Undergraduate Research Apprentice Program. Thanks are also extended to Mary Power, Peter Steel and Luke Jacobus and the Angelo Coast Range Reserve and the University of California Natural Reserve system for providing logistic support and a protected site for the research.
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