Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowseInfoImagesLinksBooksData
Photo#163236
Amara - Amara aenea

Amara - Amara aenea
Hancock County, Indiana, USA
May 27, 2002
Size: 7 mm
Amara sp. I believe it to be A. littoralis. I have a number of these (from 4 IN counties as well as from southern Michigan) and they all share the following characters: 3 setae on stria 7 subapically, front tibial spur simple, metallic dorsum, no ocellate puncture on elytra, antennomeres 1-3 pale, legs dark, shallow elytral striae, flat intervals, and humeral tooth evident.

My only hesitation is that Downie & Arnett (1) do not list it as occurring in Indiana (though I realize the book is full of errors).

Images of this individual: tag all
Amara - Amara aenea Amara - Amara aenea

Moved
Moved from subgenus Amara. Revisiting my Amara, I have decided this one best fits A. aenea.

Moved

Moved
Moved from Amara littoralis.

Moved
Moved from Amara.

 
ocellate puncture
refers to the distinct setigerous puncture at base of each abbreviated scutellar stria (= parascutellar stria) near base of elytra. A. littoralis must have such a pair, otherwise consider rekeying this specimen. Incidentally, Fritz Hieke (2000) revised the Amara impuncticollis species group which yielded five sibling species in my area of WI: A. impuncticollis (uncommon), A. littoralis (common), A. otiosa (rare), A. turbata (rare), A. ovata (rare, introduced). They are difficult to separate externally and most require genitalic confirmation. The previous keys by Lindroth and Downie & Arnett are obsolete and misleading for this species group.

 
Arghh
This is a tough group. There are no ocellate punctures or setae that I can see in my seven specimens that appear at least superficially to be the same species. I've seen such punctures in Pterosti*chus. As such, I'm clueless on this one.

 
No ocellate punctures
and presence of other features you noted would redirect branch of identification key toward species like Amara convexa or A. aenea. These two have all your features including the three punctures on apical elytra. So far I favor A. convexa based on image possibly showing oblique depressions near pronotal hind angles - but under scope these depressions should appear quite distinct. If the only distinct pair of pronotal depressions are near midline and parallel to midline, then consider A. aenea. There are of course more differences than these.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.