Great Lakes Water Life Photo Gallery

Zooplankton - Waterfleas

Cladoceran Field Guide

Leydigia

Genus Leydigia

For morphological terms see: Cladocera Anatomy

The Genus Leydigia is a group of waterfleas including just 2 rare Great Lakes species. Fine features of the carapace are used to distinguish the two species - necessitating use of a high-powered light microscope at a minimum.

Valves with longitudinal striations.
1.0mm.

Leydigia acanthocercoides

Valves without markings.
0.9mm.

Leydigia leydigi

Photos courtesy of Southwest Missouri State University Zooplankton Project

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