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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Predaceous Diving Beetles (Dytiscidae) » Dytiscinae » Aciliini » Acilius » Acilius sylvanus
Photo#164434
Predacious Diving Beetle - Acilius sylvanus - female
Copyright © 2008 Stephen Luk

Predacious Diving Beetle - Acilius sylvanus - Female
Guelph, Wellington, Ontario, Canada
April 20, 2007
Acilius sylvanus female, ventral view. Keyed using Taxonomic revision of the Holarctic diving beetle genus Acilius Leach (Coleoptera: Dytiscidae) (Bergsten & Miller, 2006; Systematic Entomology 31 (1), 145-197).
The females of most (but not all) Acilius species bear elytra with four setose sulci. Two species, A. sylvanus and A. abbre*viatus, are distinct in having an entirely yellow ventral body surface lacking the black metacoxa and metasterna of other species. The former can be distinguished by the golden setae of the elytral sulci (see next image).

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Predacious Diving Beetle - Acilius sylvanus - female Predacious Diving Beetle - Acilius sylvanus - female Predacious Diving Beetle - Acilius sylvanus - female
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Contributed by Stephen Luk on 8 January, 2008 - 9:54pm
Last updated 9 January, 2008 - 5:02am

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… Cotinis, 9 January, 2008 - 5:02am login or register to post comments

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