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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Dragonflies and Damselflies (Odonata) » Dragonflies (Anisoptera) » Skimmers (Libellulidae) » Libellula » Four-spotted Skimmer (Libellula quadrimaculata)
Photo#372393
Four-spotted closeup of exuviae/larva, margin of median lobe of prementum - Libellula quadrimaculata
Copyright © 2010 Denis A. Doucet

Four-spotted closeup of exuviae/larva, margin of median lobe of prementum - Libellula quadrimaculata
Bell Pond, Prince Edward Island National Park, Queens County, Prince Edward Island, Canada
Please compare with the distinctly crenulate margin of median lobe of prementum of Ladona julia here: , as per fig 437, p 606 in Needham , Wesfall and May 2000. In the key, this is how we distinguish between Libellula/Cannaphila vs. Ladona/Plathemis larvae or exuviae. In Libellula/Cannaphila, the margin is quite SMOOTH...
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Contributed by Denis A. Doucet on 19 February, 2010 - 12:49pm

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