Calathus melanocephalus - Calathus

Calathus sp.

Moved from Woodland Ground Beetles to new genus page based on identification in comments below.

… Robin McLeod, 15 July, 2007 - 6:20pm

Calathus melanocephalus not in California

Calathus melanocephalus is a Palaearctic species whose only reported occurrence in North America is New York as "introduced but probably not established" per Bousquet & Larochelle, 1993. Westernmost range is Iceland.

… Peter Messer, 15 July, 2007 - 1:40pm

Moved

Moved from Beetles.

… Boris Büche, 30 March, 2007 - 5:07am

probably not

Hi Paolo!

Nice you confirmed Calathus! I am reserved concerning your species ID., however. C.melanocephalus is smaller (attaining 8.5 mm body length), and clearly bicoulored (almost black, only pronotum reddish) - not fully coloured specimens should have disappeared so late in the year.

regards, Boris

… Boris Büche, 19 December, 2006 - 6:18am

I support this opinion

Hi Paolo,

please check the character pointed out by Pierre-Marc. If it proves right, my congratulations - you produced a new genus for bugguide!

regards, Boris

… Boris Büche, 15 December, 2006 - 5:55am

The Tarsal Claw

I tried very hard to take the picture while the beetle was moving. Would you confirm that it's a pactinate tarsal claw? Thanks!!
Paolo

… Paolo Sanguankeo, 18 December, 2006 - 3:31pm

Yes

Yes, it is pectinate. So, genus Calathus confirmed.

… Pierre-Marc Brousseau, 18 December, 2006 - 5:00pm

Will try

I'll look for the characteristic Pierre-Marc had pointed out and will let you and him know. I'm away from the lab at the moment. Thanks for the congrads in advance. I have posted another species for ID. Your input will be greatly appreciated.

Paolo

… Paolo Sanguankeo, 15 December, 2006 - 10:02pm

Calathus ?

It look like a Calathus sp. to me. But I'm not sure; is the tarsal claw pectinate ? If so, Calathus is good, else, I'm wrong.

… Pierre-Marc Brousseau, 12 December, 2006 - 8:54am

Will try

I'll look for the characteristic when I'm back in lab at school. I have posted another species for ID. Your input will be greatly appreciated. Thanks!!

… Paolo Sanguankeo, 15 December, 2006 - 10:04pm