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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Harpalinae » Pterostichitae » Woodland Ground Beetles (Pterostichini) » Poecilus » chalcites group (Poecilus chalcites group) » Poecilus chalcites
Photo#198163
Beetle - Poecilus chalcites
Copyright © 2008 Sam Houston

Beetle - Poecilus chalcites
Sand Springs, Osage County, Oklahoma, USA
July 5, 2008
Size: 8mm (5/16")
Please help with ID.
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Contributed by Sam Houston on 6 July, 2008 - 2:00pm
Last updated 11 February, 2019 - 5:24pm

Moved
Moved from Poecilus.
… Jonathan W. Quist, 11 February, 2019 - 5:24pm login or register to post comments

Moved
Moved from Beetles.
… Will Chatfield-Taylor, 25 August, 2008 - 6:19pm login or register to post comments

Poecilus, i'd suggest
*
… v belov, 6 July, 2008 - 2:52pm login or register to post comments

 
Poecilus,
formerly a subgenus of Pterostichus, is also a good choice. Easy to distinguish on basis of Poecilus having distinct dorsal carinae (ridges) along the basal antenna segments. Can't really see them here but of course they could be hidden by an unfortunate viewing angle or inadequate resolution of photo and/or my monitor. By enlarging the image I begin to see a suggestion of a darkened ridge along right third antenna segment. If true, then genus Poecilus is indeed correct. Thanks.
… Peter W. Messer, 6 July, 2008 - 6:18pm login or register to post comments

Carabidae - Pterostichus
tentatively and more likely than Harpalus based on proportionately smaller head. Normally not a difficult genus distinction with specimen examination in hand. Hope to check back for new insights from your image.
… Peter W. Messer, 6 July, 2008 - 2:36pm login or register to post comments

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