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Photo#77532
Small Spider - Cyclosa conica

Small Spider - Cyclosa conica
Prospect Creek, Sanders County, Montana, USA
July 5, 2006

There must be something we can use
to separate conica from turbinata when we can't be sure about the presence of abdominal tubercles. I'll read Levi again. I stare at images such as
and
trying to determine which species they are without making much progress.
Does have tubercles?

 
conica vs. turbinata
Both of these are shown in The Insects and Arachnids of Canada, Part 23. Here are some other differences in females:
1) Turbinata has a longer more pointed carapace.
2) Conica is supposed to have more distinct rings on the front 4 legs.
3) Conica found in understory of coniferous or mixed forests while turbinata is found collected in open habitat and oak forests.
4) Conica is found in more northern locations, so most Canadian images would more likely be conica. Turbinata is a found in the southeast about Texas east to North Carolina and south to Florida. They overlap in CA, OR, WA, CO, & the northeastern states.
5) Conica has one or two ventral macrosetae on coxa IV.
6) Conica has a dark carapace somewhat paler anteriorly, while turbinata shows a more uniformly brown colored carapace.
Finally, I'm not sure if these are differences or not, but it mentions that conica may have a row of debris in a vertical line, and that turbinata has a vertical stabilimentum in which the female incorporates its egg sacs.


This one was found in coniferous understory, so I think it's right.


This one is probably conica based on the white anterior carapace.

Moved
Moved from Cyclosa turbinata. Good call, I agree.

This one really looks like
conica

Moved
Moved from Io Moth.

Moved
Moved from Cyclosa turbinata.

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