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Genus Erythemis - Pondhawks

Common Pondhawk? - Erythemis simplicicollis - female Green Dragonfly - Erythemis simplicicollis - female Eastern Pondhawk (teneral) - Erythemis simplicicollis Eastern Pondhawk grooming - Erythemis simplicicollis - male Black dragonfly with dark red eyes - Pin-tailed Pondhawk (male) - Erythemis plebeja   - Erythemis plebeja Non-Flower Vegetation Arthropod #2 - Erythemis simplicicollis Green Dragonfly on the Beach - Erythemis simplicicollis - male Eastern Pondhawk (Erythemis simplicicollis) - Erythemis simplicicollis
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Odonata (Dragonflies and Damselflies)
Suborder Anisoptera (Dragonflies)
Family Libellulidae (Skimmers)
Genus Erythemis (Pondhawks)
Explanation of Names
Author of genus is Hagen, 1861. From eryth- (?), Greek, meaning red, plus the ubiquitous suffix -themis. This is from Greek, first used by Hagen in 1861, and it means "what has been established", i.e., rule, or law. Themis was also a goddess of order and justice. However, it is possible the suffix was also simply based on the Greek suffixes -hemis (half), or -emis. See this Odonata list post by KD Dijkstra.
Numbers
Odonata of North America lists 7 species.
Dunkle, p. 211, lists 5 species. (1)