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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Harpalinae » Pterostichitae » Chlaeniini » Vivid Metallic Ground Beetles (Chlaenius) » subgenus Chlaenius (Chlaenius subgenus Chlaenius) » aestivus group (Chlaenius aestivus group) » Chlaenius platyderus
Photo#1577778
Chlaenius amoenus? - Chlaenius platyderus
Copyright © 2018 Jack Foreman

Chlaenius amoenus? - Chlaenius platyderus
Meramec State park, Franklin County, Missouri, USA
August 18, 2018
Size: 16mm
I think I've narrowed this marvelous beetle down to C amoenus or C emarginatus but I don't believe the mandibles are quite large enough for the latter. Hopefully I'm not too far off.
Found in rip rack along the banks of the Meramec River.Kept hiding under the rocks and I was finally forced to chase it into the water in order to capture it.(They swim very well)

Images of this individual: tag all
Chlaenius amoenus? - Chlaenius platyderus Chlaenius amoenus? - Chlaenius platyderus Chlaenius amoenus? - Chlaenius platyderus
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Contributed by Jack Foreman on 18 August, 2018 - 9:19pm
Last updated 27 July, 2023 - 5:45am

Moved tentatively
Moved from subgenus Chlaenius.
… v belov, 27 July, 2023 - 5:45am login or register to post comments

in grayscale, i'd probably call it platyderus
… v belov, 21 July, 2021 - 2:09am login or register to post comments

 
Thank you
You may be ,likely are, right. I mentioned in one of the comments that the metallic sheen was barely noticed in real life. Also since then I've realized that my camera sensor often gets confused with metallic colors, and especially so when using the flash which I did on these shots.
… Jack Foreman, 21 July, 2021 - 7:40am login or register to post comments

Interesting one,
I agree with Frank, it's something in that neighborhood, but it might not be possible to get a species name from the photo alone.

Here's a rare Chlaenius to look out for, it's endemic to your area:
… Curt Harden, 4 March, 2019 - 10:12am login or register to post comments

 
Thanks for the info Curt
Appreciate the heads up on C viduus. I'll keep an eye out, (but think I'll wait for the snow to melt before heading out to the nearest sandbar. ( :
… Jack Foreman, 4 March, 2019 - 10:57am login or register to post comments

Moved
Moved from Vivid Metallic Ground Beetles.
… v belov, 26 August, 2018 - 5:07pm login or register to post comments

Probably Chlaenius aestivus or laticollis?
It can't be Chlaenius amoenus or emarginatus because the mandibles are too small and the labrum does not have a notch or indentation. You can rule out some other common things in the tricolor and pennsylvanicus group because it is too big, the head appears to have hairs, and the third antenna segment is very long. I think this is most consistent with aestivus or laticollis but the coloration is somewhat intermediate between the two.
… Frank Guarnieri, 20 August, 2018 - 7:23am login or register to post comments

 
Thanks Frank, I guess I should be used to not being able to
get Carabs to species but I just need to get used to it, tough family, even for the experts. I appreciate you taking the time to look this one over so closely and for sharing your knowledge. Thank you.

For what it's worth, (probably nothing), the camera/flash highly exaggerated the metallic green, it was barely noticeable in real life.
… Jack Foreman, 20 August, 2018 - 12:38pm login or register to post comments

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