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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Harpalinae » Harpalitae » Licinini » Badister » Subgenus Baudia (Badister Subgenus Baudia) » micans group (Badister micans group) » Badister grandiceps
Photo#1799038
Badister - Badister grandiceps
Copyright © 2020 Owen Strickland

Badister - Badister grandiceps
Toronto, Ontario, Canada
April 11, 2020
Size: 5.1mm
Specimen got away from me, sadly. I'm pretty sure it's Badister grandiceps (4.6-5.6mm), due to size, notched left mandible. B. transversus has a notched right mandible, and B. parviceps is too small (3.4-4.2mm) for this specimen. The only other option is Badister micans (B. ocularis in Bousquet 2010) which is listed at 5.4-6.2mm.

Bousquet 2010 key used.
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Contributed by Owen Strickland on 11 April, 2020 - 9:53pm
Last updated 19 June, 2020 - 4:36pm

The first accurate Badister grandiceps on BugGuide.
A good project would be to study the sister species B. micans = ocularis posted on BugGuide. Some grandiceps might be lurking there.
… Peter W. Messer, 12 April, 2020 - 2:20pm login or register to post comments

 
Thank you very much
For the confirmation! I like your point about head size, I can really see the difference.

New for me today were Mioptachys flavicauda and a different, lighter Elaphropus that you may find interesting.

https://bugguide.net/node/view/1799407
… Owen Strickland, 12 April, 2020 - 8:46pm login or register to post comments

Badister grandiceps is likely.
Barring ABL differences which happen to overlap in the range 5.4 - 5.6 mm, here are my distinctions between mostly smaller B. grandiceps vs mostly larger B. micans (= B. ocularis):

1) Pronotum narrower, anterior border moderately incurved vs much broader and border strongly incurved.
2) Head normal vs disproportionately large.

I don't like the very subtle differences in microsculpture between supraorbital setae (Bousquet 2010).

Incidentally, B. micans (= B. ocularis) is also known in Ontario.
… Peter W. Messer, 12 April, 2020 - 2:05pm login or register to post comments

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