Variability, Distribution and Taxonomy of Calopteryx Dimidiata (Zygoptera: Calopterygidae)
Abstract
This study reviews the taxonomic instability of the names Calopteryx apicalis Burmeister and C. dimidiata Burmeister. The data support Hagen's early revision where he recognized only one species with the name C. dimidiata. A complete synonymy appears followed by criteria for distinguishing the species from other Western Hemisphere congenerics, an interpretation of the unstable nomenclatural usage, and summary of distribution by county for each state. An analysis of variability through the species range finds spring adults to be typically larger in wing, leg, and body characters than summer and fall specimens from the same regions. A possible explanation is advanced based on larval growth periods. Wing color patterns, female stigma size, and female morphs have little to no seasonal variation and occur in geographical clines.Downloads
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