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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Adephaga » Ground Beetles (Carabidae) » Harpalinae » Harpalitae » Platynini » Tanystoma » Tule Beetle (Tanystoma maculicolle)
Photo#90289
Unknown carabid - Tanystoma maculicolle - male
Copyright © 2006 Paolo Sanguankeo

Unknown carabid - Tanystoma maculicolle - Male
Paso Robles, San Luis Obispo County, California, USA
November 1, 2006
Size: 13mm
I'm doing a research on carabid weed seed predation. I have used the carabid key of England, but could not key this species out. This is quite an abundance species around California Central Coast. It also secretes stinky substance, an odor of old unwashed socks, when agitated. The picture containing two beetles, it's the bottom one I'm after for identification. If anyone knows what this beetle is, please let us know. Thanks a million in advance. Paolo

Images of this individual: tag all
Unknown carabid - Tanystoma maculicolle - male Unknow carabid - Tanystoma maculicolle - male
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Contributed by Paolo Sanguankeo on 15 December, 2006 - 9:54pm
Last updated 22 November, 2023 - 8:16pm

Moved
Moved from Tanystoma.
… Connor E.J. Graham, 22 November, 2023 - 8:16pm login or register to post comments

Moved
Moved from Harpalinae.
… Charley Eiseman, 25 October, 2008 - 7:30pm login or register to post comments

Pterostichini + Platynini
Top is Pterostichus (Hypherpes) sp and bottom a Tanystoma sp.

Kip
… Kipling Will, 14 July, 2007 - 1:14pm login or register to post comments

Moved
Moved from Beetles.
… Boris Büche, 30 March, 2007 - 5:05am login or register to post comments

Two species
Hi Paolo,

your problems to "key this one out" may be explained in part by the fact, that the photographed individuals belong to two genera, only distantly related. Also it is always problematic to use keys developed upon one fauna for identifications of members of another. Definitions of genera in the key may not fit, etc.

Because I am from Europe, I can´t tell you the exact placement of the two Carabids.
The upper one will belong in a genus near Pterostichus (or subgroup of Pterostichus proper); the lower one reminds me of Olisthopus, but may belong somewhere else in the vicinity of genus Agonum.

Both are probably rather predators than seed feeders.

regards, Boris
… Boris Büche, 18 December, 2006 - 5:08am login or register to post comments

 
Lower subject.
The lower individual is a specimen of the "tule beetle," which has changed genera since I last committed it to memory (I collected a couple in southern Oregon in the 1980s). You should get a copy of Arthur V. Evans' new field guide to California beetles. It is not exhaustive, but is a great, up-to-date reference in any event. It just came off the presses a few weeks ago.
… Eric R. Eaton, 18 December, 2006 - 11:43am login or register to post comments

 
Thanks!
I Google image for Tule beetle, and found that it's in the genus Agonum. Cool. The other big one in the picture is Pterostichus. I also looked up the book you recommended. Will get one for sure. Thanks,

Paolo
… Paolo Sanguankeo, 18 December, 2006 - 3:12pm login or register to post comments

 
Key for California Carabid?
Do you know of any key deveoped for California Carabidae?
Thanks,
Paolo
… Paolo Sanguankeo, 18 December, 2006 - 10:32am login or register to post comments

 
American Beetles
If you use American Beetles (Carabidae are in Vol 1) you can get any NA beetle to genus.
… Brad Barnd, 21 December, 2006 - 7:56pm login or register to post comments

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