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Home » Guide » Arthropods (Arthropoda) » Chelicerates (Chelicerata) » Arachnids (Arachnida) » Spiders (Araneae) » True Spiders (Araneomorphae) » Entelegynae » Hacklemesh Weavers (Amaurobiidae) » Pimus » Pimus fractus
Photo#232287
Pimus - Pimus fractus
Copyright © 2008 Ken Schneider

Pimus - Pimus fractus
Huddart Park, San Mateo County, California, USA
October 9, 2008
Size: ~ 5 mm
I found this cool spider underneath a log, but was unable to collect it. Maybe a hacklemesh weaver? Seems to match some of our images of Callobius...

Images of this individual: tag all
Pimus - Pimus fractus Callobius? - Pimus fractus
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Contributed by Ken Schneider on 9 October, 2008 - 5:51pm
Last updated 25 March, 2011 - 11:24pm

Moved
Moved from Pimus.
… R.J. Adams, 25 March, 2011 - 11:24pm login or register to post comments

Moved
Moved from Spiders.

pretty sure that this is a Pimus, related (perhaps distantly?) to Callobius
… marshal hedin, 23 March, 2009 - 10:50pm login or register to post comments

 
Wonderful!
I didn't collect this spider - never thought I'd get an ID. Your help is much appreciated!
… Ken Schneider, 23 March, 2009 - 11:03pm login or register to post comments

 
species ID
Based on Keith Robbin's 2010 SDSU thesis,this would almost certainly have to be P. fractus based on geography (I am aware of the circular logic of geography-based identifications, but in situations with clear allopatry it is very useful).

A copy of the thesis can be found at:

http://sdsu-dspace.calstate.edu/xmlui/handle/10211.10/516
… R.J. Adams, 25 March, 2011 - 11:23pm login or register to post comments

 
Great!
Thanks for the ID and reference. More cryptic species - rats!

I was struck by this sentence from the abstract:

"Neither male nor female genitalia were particularly useful in species delimitation, however the shape of the male palpal RTA (retrolateral tibial apophysis) does correspond phylogenetically to deeper
groupings of species".

P.S. - I placed a link to the thesis on the genus page.
… Ken Schneider, 26 March, 2011 - 9:05am login or register to post comments

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