Crab Spider - Tmarus minutus

Moved

Moved from Tmarus. While the palp pictures here are not conclusive, this specimen keys out pretty cleanly to T. minutus in Gertsch, 1939 (1). It has no pairs of ventral spines on the tibiae which limits it to T. minutus or T. unicus. The clypeus is sloping (not horizontal) and metatarsi I do not have more than two ventral spines which makes this T. minutus.

A nice addition to the guide. Thanks John!

… Chad Heins, 15 July, 2014 - 2:19pm

Thanks Chad

That was quick!

… John Rosenfeld, 15 July, 2014 - 2:27pm

If I have the resources

readily available on my computer, I can be a bit faster. My books are in the lab and not at my desk.

… Chad Heins, 15 July, 2014 - 2:30pm

Moved

Moved from Spiders.

… John Rosenfeld, 3 July, 2014 - 10:35am

If the palp is a good match

and you found a female I think you're good to move it. Nice one!

… Laura P., 3 July, 2014 - 9:57am

If you find the time

could you look at this, it's in the paper linked to on the info page for Tmarus. I think this has to be correct, it matches the diagram. It was also too small to be T. angulatus and the habitus seems more consistent with T. minutus. This is a new species so it would need a page. Thanks.

… John Rosenfeld, 15 July, 2014 - 1:11pm

Tmarus minutus

is a better match.

… John Rosenfeld, 15 July, 2014 - 9:16am

I agree.

… Laura P., 16 July, 2014 - 8:14pm

The only reason I'm hesitant is

this one and the female look quite different from other spiders I've posted that were IDed as Tmarus angulatus. Those were also more consistent with the illustration in Bradley's Common Spiders of North America. I didn't check to see if the other one was adult so I guess it could have been an immature male but it looked exactly like this one and I think it was around the same size. I'll move it to genus for now.

… John Rosenfeld, 3 July, 2014 - 10:33am