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KY spider 01 - Dipoena dorsata

KY spider 01 - Dipoena dorsata
Pulaski County, Kentucky, USA
May 27, 2011
Size: 2.25 mm
Will send this and others to Kevin.

Images of this individual: tag all
KY spider 01 - Dipoena dorsata KY spider 01 - Dipoena dorsata

Moved from Dipoena.

Moved from Spiders. Thanks Kevin, very cool.

If you search here on Dipoena
you will find comments on about five other specimens indicating they might be in that genus. Any thoughts about how we might gather those together when the new page is made for this specimen?

It has a dark, leathery-brown appearance with no pattern (this species) and is vaguely "tick-like" in its proportions:

- abdomen "globose, rounded behind" (fig. 62.59, SONA)
- spinnerets ventral
- clypeus high; head region projecting; AME largest (fig. 62.57, SONA)
- legs short and robust (Levi, 1953)

I believe this is Dipoena nigra, but first want to clear the epigynum and carefully measure tarsus/metatarsus IV ratio (see Levi, 1953b). Jonathan Coddington has photos of a similar specimen online somewhere.

Dipoena dorsata
Dipoena dorsata -- metatarsus/tarsus ratio was not what I thought it would be and epigynum is better fit.

Levi (1953b) says the mt/t ratio for D. nigra should be 11 to 6; for D. dorsata "about equal in length". For this specimen I get 7 to 6, which I guess qualifies as about equal.

He gives a length of 1.6-1.8 mm for dorsata; for nigra he gives 2.1-4.3 mm.

Would be nice to see a few more of these (and also D. nigra, for the sake of comparision). Pictures to follow.

Dipoena dorsata
I made a guide page, but then realized that maybe you weren't sure of the ID yet because of the size discrepancy?

What do you think about the other images that come up
when you do a search here on Dipoena?

They all could be, as far as
They all could be, as far as I can tell. But haven't seen too many of these, yet.

I'd place it in dorsata for n
I'd place it in dorsata for now -- we could only hope that someone would come along and say, 'no, no, that's not dorsata, it's...'. There's always another day and new knowledge.

tough for me
Sorry Brad, some spiders I just have to see alive to ID. I look at every part... even the way they hold their legs. I don't suppose you can take live shots first, then preserve the specimens?

Interesting that you would write that
I had the same realization yesterday when looking through all the new images. I just can't do them! It was an interesting realization that my knowledge is restricted to live specimens.

Sometimes it works the other way too. Some beetle groups, such as carabids, are much easier to identify from preserved specimens than from live shots.

This whole series of spiders were collected 'inadvertently' with pan traps, sweep netting, etc., which doesn't really allow for live shots, not that I have a good camera anyway. If I'm near my scope I've been trying to get some live shots, but I can't really do that otherwise.

We assume that spiders are easier to key
from preserved specimens too, and Kevin will likely do that handily for us. But I realized that I couldn't sight ID them!

Yes, I agree
Kevin will have much more luck than we will. Are you sending them to him?

the whole lot of them

Our first thought was "Dictyna-like"

but we realized we just don't know the ventral side of those at all. So we'll have to wait for Kevin along with you!

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