Lepidurus lemmoni Holmes: A Redescription with Notes on Variation and Distribution

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Abstract
Lepidurus lemmoni Holmes. 1894 is redescribed in detail from an examination of over 200 specimens from the type locality, Honey Lake, Lassen County, California. Morphological differences between the sexes are recorded. Lepidurus lynchi Linder, 1952 is considered an infrasubspecific variety of L. lemmoni Holmes. The extreme variability in the development of the spines of the carapace, boht within the population of Honey Lake and between populations in widely separated habitats, is described. The species has been collected from ponds of alkaline, opaque water in northeastern California, northwest Nevada, south central Oregon, central Washington, Montana, and Wyoming.

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