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Timema - female

Timema - Female
McCullough Range, Pine Spring Rd, Clark County, Nevada, USA
May 14, 2017
Timema nevadense? Collected by Katja Kramp.

Images of this individual: tag all
Timema - female Timema - female Timema - female Timema - female

Neat finds, Martin!
Do you know what plant this was collected from?

Location for both this and your other recent post from Charleston Mnts would suggest T. nevadense, as you thought. Not quite enough detail of the fine-scale shape of the terminalia to say much more, except that both posts appear to be females...which are harder to ID, even under the happy circumstances of having clear, high-resolution images of terminalia. (Also...dorsal, ventral, and lateral views are helpful for trying to ID females.)

Also, it's unusual to find females without males riding on their backs (i.e. mate-guarding). Did you see any other individuals? A rule of thumb given by Timema experts (e.g. Cristina Sandoval at UCSB) is that if one sees five or more females and no males in a local population...there's a good liklihood you're looking at a parthenogenic species. (BTW, T. nevadense is a sexual species.)

This appears to be a very good year for Timema.

I have the s-pecimens, so I c
I have the s-pecimens, so I could make some close up pics of the terminalia. Katja was sweeping Pinus monophylla (which would support T nevadense), but also oak and other shrubs... and no we did not find other specimens...

Photos of terminalia
That would be great, Martin, if you could get good terminalia photos (i.e. dorsal: including terminal tergite; ventral: including subgenital plate; and lateral; showing relative size & shape of cerci). Males have much more easily interpreted diagnostic structure as far as species ID goes, but often you gotta take what you can get :-)

I should have wrote to you sooner (unfortunately, I can be a slow poke!). Hope they haven't shriveled or discolored too much over the last week or so.

Seems like an interesting desert habitat you visited. Wish I could have been there! :-)

I will try my best, but might
I will try my best, but might take a while... rather busy in the moment...

Totally understand...I know you've got lots going on!
And, for female Timema, terminalia don't provide as much diagnostic value as they do for males. So it's not so pressing of an issue (although, if this turned out to be a parthenogenetic species, it would become more central...but that doesn't seem particularly likely at this point).

Whatever you can do photo-wise, whenever you can...will be appreciated, as always.

PS: Hope the many denizens of your wonderful menagerie are doing well.  ¡¡Viva Anomalocaris!! :-)

So I added some more pics...
So I added some more pics... hope they help... Where did you find the Anomalocaris pic!

Wow, Martin!!
Those are wonderfully clear photos for comparing with the standard views for female terminalia as figured in the main references!!

The two closest known Timema species to your McCullough Mnts locale are T. nevadense, which is fairly nearby to the west; and T. coffmani which is further away and across the Colorado River in AZ.

I made an additional post of three collages for comparing the figured terminalia for both those species to the female appearing in your photos:


Unfortunately, it seems there's no coherent match up with a single one of these two species. And looking at the diagrams for other species, I found no better alternatives.

I don't know whether this is due to intra-species variation in the shapes of the various structures involved, or if perhaps your post is an undescribed species. Timema can be tricky, especially if one only has female specimens to work with. And there are likely a number of undescribed taxa out there. At any rate, you've documented the terminalia quite well, which if nothing else is a good exemplar and may help in the future.

(PS: The Anomalocharis pic was drawn by some local aboriginal kids I met while botanizing on a remote Pacific island ;-) ;-)

Aaron, nice comparison... th
nice comparison... the ventral view is really more like coffmani, very strange, I thought it is a clear nevadense, just from the location! Very interesting. We have the specimens now in our freezer, so if somebody is doing some more genetic work, they are available...
Thanks so much for your effort and work you put in there, and thanks for the drawing!

Moved from ID Request.

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