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Jumping Spider - Eris militaris - male

Jumping Spider - Eris militaris - Male
Allison Park, Allegheny County, Pennsylvania, USA
October 2, 2015

Images of this individual: tag all
Jumping Spider - Eris militaris - male Jumping Spider - Eris militaris - male Jumping Spider - Eris militaris - male Jumping Spider - Eris militaris - male Jumping Spider - Eris militaris - male Jumping Spider - Eris militaris - male

Moved from Eris flava.

John, this looks more like a classic E. militaris to me. There is no white line below the eyes and the palp fits that species better than E. flava as well.

After reading Madison's paper
about distinguishing Militaris from flava, I have to agree with you , though the apohpysis still bothers me. I patially based my diagnosis on this spider which is most likely misidentified-

It should probably be moved to militaris.

I think I'm going to let that one sit where it is just because of the strong hook on the embolus. They mention that the pattern for this specimen is much more typical of E. militaris and this likely does represent an odd individual, maybe even a undescribed hybrid (which complicates everything). Keep looking for E. flava; I know I will.

You may be right
I based the ID on the following observations-

The embolus is shorter and wider than the embolus on my E. militaris here-

(Assuming that determination was correct)

I thought that the embolus on this one looked more like the E. flava diagram here- 1 than the E militaris diagram at that site. (what diagrams were you looking at?)

It doesn't seem to have the little curved tibial apophysis that E. militaris has though it may be concealed behind the setae.

The white line seems not to always be too prominent provided the specimen photos I looked at were properly diagnosed, which they may not have been.

The only Eris I've found so far in my studies is E. militaris and I've been trying to find the other species here in Minnesota. The palp pictures I've taken for this species do show some variability and some have resulted in me digging into the literature again. The paper I looked at was Maddison, 1986. His comparison mentions that the wrinkles at the embolar base on the palp of E. flava have some curl to them. I believe the tibial apophysis is present on your spider, though concealed by the hairs.

See my second response above
I was writing it when you replied so I missed this comment.

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