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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Staphyliniformia » Hydrophiloidea » Clown Beetles (Histeridae) » Histerinae » Platysomatini » Platysoma » subgenus Cylister (Platysoma subgenus Cylister) » Platysoma coarctatum
Photo#180354
Histerid - Platysoma coarctatum
Copyright © 2008 tom murray

Histerid - Platysoma coarctatum
Groton, Middlesex County, Massachusetts, USA
May 2, 2008
Size: 3mm
Found under pine bark on a log that the bark was still tight and moist.

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Histerid - Platysoma coarctatum Histerid - Platysoma coarctatum Histerid - Platysoma coarctatum Histerid - Platysoma coarctatum Histerid - Platysoma coarctatum
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Contributed by tom murray on 2 May, 2008 - 10:23pm
Last updated 16 December, 2008 - 11:58am

Moved
Moved from Platysoma.
… Jeff Gruber, 16 December, 2008 - 11:58am login or register to post comments

Moved
Moved from Clown Beetles.
… tom murray, 8 October, 2008 - 4:42pm login or register to post comments

Probably P. coarctatum
The ventral shot shows the presence of a marginal prosternal stria, which is lacking in P. gracile. These individuals also do not seem to be cylindrical enough. Is there any way you can get a straight on lateral shot? And a closeup of the face?
… Jeff Gruber, 3 May, 2008 - 5:33pm login or register to post comments

 
Shots added
Jeff I posted the extra angles of the face and a lateral view. Is that good enough to confirm P. coarctatum?
… tom murray, 3 May, 2008 - 11:17pm login or register to post comments

 
Yes
Thanks Tom for the extra effort.

Presence of a complete medial marginal stria on the pronotum just behind the head separates this from P. parallelum, as does the small size of the pygidial punctures. P. parallelum looks very similar in size and shape.
… Jeff Gruber, 16 December, 2008 - 12:05pm login or register to post comments

 
Jeff,
Thanks for confirming the species id!
… tom murray, 16 December, 2008 - 3:05pm login or register to post comments

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