Table of Contents Author Guidelines Submit a Manuscript
Volume 2010 (2010), Article ID 493935, 5 pages
Research Article

Taxonomic Review of the Caudatella heterocaudata (McDunnough) and C. hystrix (Traver) Complexes (Insecta: Ephemeroptera: Ephemerellidae)

Department of Biology, Indiana University, Bloomington, Indiana 47405, USA

Received 20 August 2010; Accepted 27 October 2010

Academic Editor: Ai-Ping Liang

Copyright © 2010 Luke M. Jacobus. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Caudatella columbiella (McDunnough, 1935), new combination, (Insecta: Ephemeroptera: Ephemerellidae) is removed from synonymy with Caudatella heterocaudata (McDunnough, 1929), and a new junior synonym is recognized, based on comparative examination of type material and larval exuviae associated with adults from the type locale of C. columbiella (=C. californica (Allen and Edmunds, 1961), new status, new synonym). Caudatella circia (Allen and Edmunds, 1961), new status, is recognized as a strict specific synonym of C. heterocaudata (McDunnough, 1929) (=C. circia (Allen and Edmunds, 1961), new synonym). A neotype is designated for Caudatella hystrix (Traver, 1934), based on a specimen collected in Western Montana, USA, during June 2000. Morphological differences between the type specimen of C. hystrix and the type specimens of its two junior synonyms, Ephemerella cascadia Allen and Edmunds, 1961, and E. spinosa Mayo, 1952, are detailed. An identification key for larvae of the genus Caudatella is included.