title: Anomalomermis ephemerophagis n. g., n. sp. (Nematoda: Mermithidae) parasitic in the mayfly Ephemerella maculata Traver (Ephermeroptera: Ephermerellidae) in California, USA.
abstract: 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.
authors.affiliation: Department of Integrative Biology, Oregon State University, Corvallis, OR, 97331, USA, poinarg@science.oregonstate.edu.
authors.forename: George
authors.initials: G
authors.lastname: Poinar
authors.forename: Larissa
authors.initials: L
authors.lastname: Walder
authors.forename: Hiromi
authors.initials: H
authors.lastname: Uno
mesh_terms: D000818:Animals; D002140:California; D065133:Ephemeroptera / Q000469:parasitology*; D005260:Female; D008297:Male; D009348:Nematoda / Q000033:anatomy & histology / Q000145:classification* / Q000382:microbiology / Q000502:physiology*; D013045:Species Specificity