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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Harpalinae » Pterostichitae » Woodland Ground Beetles (Pterostichini) » Myas » Myas coracinus
Photo#414965
carabid - Myas coracinus
Copyright © 2010 Blaine Mathison

carabid - Myas coracinus
Lithonia, DeKalb County, Georgia, USA
June 21, 2010
Size: 15.5 mm
Pterostichus (Abacidus) vs. Dicaelus sp. Showing hind tarsus in case of the former. Placing generally in Carabidae until I can key it out tonight (or someone beats me to it :).

Imaging does not allow one to appreciate the delicate purplish hue over much of the beetle's body.

Images of this individual: tag all
carabid - Myas coracinus carabid - Myas coracinus carabid - Myas coracinus
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Contributed by Blaine Mathison on 22 June, 2010 - 11:38am
Last updated 22 June, 2010 - 6:07pm

Moved
Moved from Ground Beetles.
… Blaine Mathison, 22 June, 2010 - 6:07pm login or register to post comments

Myas?
Is my first thought.
… Brad Barnd, 22 June, 2010 - 4:36pm login or register to post comments

 
Right you are about Myas.
Two species in GA. Dilated apical palpomeres, very convex (hemispherical) eyes, stouter antennomeres, and absent dorsal punctures on elytra would distinguish Myas from Abacidus.
… Peter W. Messer, 22 June, 2010 - 6:05pm login or register to post comments

 
You guys just beat me to it...
was keying out now and it is Myas (good call Brad)--the palpomeres are diagnostic. The striae are punctate and the lateral bead looks wide, so I am moving to M. coracinus.
… Blaine Mathison, 22 June, 2010 - 6:07pm login or register to post comments

can't be Dicaelus, that's for sure; Pterostichini sounds good
… v belov, 22 June, 2010 - 12:20pm login or register to post comments

 
pretty sure...
this is an Abacidus...we'll soon see!
… Blaine Mathison, 22 June, 2010 - 12:27pm login or register to post comments

 
Key to the 4 species of Abacidus known in GA
appears in Ciegler (2000): couplets 2 to 4 on page 64.
… Peter W. Messer, 22 June, 2010 - 12:57pm login or register to post comments

 
Ciegler (2000)
I was going to run it through Ciegler tonight. I do not think it is the same as the P. sculptus I posted earlier. That specimen was larger and all black.
… Blaine Mathison, 22 June, 2010 - 2:47pm login or register to post comments

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