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Photo#398146
Cremastocheilus - ? - Cremastocheilus quadricollis

Cremastocheilus - ? - Cremastocheilus quadricollis
Texhoma, Texas County, Oklahoma, USA
May 19, 2010
Size: 12 m

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Cremastocheilus - ? - Cremastocheilus quadricollis Cremastocheilus - ? - Cremastocheilus quadricollis Cremastocheilus - ? - Cremastocheilus quadricollis Cremastocheilus - ? - Cremastocheilus quadricollis

sweet; thanks, Kurt & Bill!
Moved from Cremastocheilus.

Cremastocheilus quadricollis Casey
This is an interesting specimen and a good record as I have only seen a few of this color form, described as C. setosifrons by Casey. The northern specimens of quadricollis (mostly from OK & KS) are reddish rather than piceous as in most TX specimens. The straight, narrow meso- and metatibia, the latter with an obsolescent to obsolete submedian tooth, the rounded to subpentagonal clypeal margin, and the subquadrate pronotum are diagnostic, however. The three species in this group (saucius, quadricollis, and hirsutus) are apparently parapatric, but I have not seen intergrades. So, they are "species" for now. Cremastocheilus excavatus Cazier is the southern part of the C. hirsutus cline and will be synonymized eventually.

 
Thanks Dr. Warner and Vassili,
I appreciate the ID and discussion.

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