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Photo#1173219
Cosmopterix? on Dichanthelium winter rosette - Cosmopterix clandestinella

Cosmopterix? on Dichanthelium winter rosette - Cosmopterix clandestinella
Mehan, Payne County, Oklahoma, USA
December 11, 2015
Size: larva ~7mm
Larva emerged from a drying leaf on 10 December, and it was transparent. Today it was this coloration. ID of Cosmopterix clandestinella was suggested by Charley Eiseman, and confirmed by Terry Harrison due to "the habit and coloration of the larva". Thanks to both.

Images of this individual: tag all
Cosmopterix? on Dichanthelium winter rosette - Cosmopterix clandestinella Cosmopterix? on Dichanthelium winter rosette - Cosmopterix clandestinella Cosmopterix? on Dichanthelium winter rosette - Cosmopterix clandestinella

Habit of the larva
By that, I presume Terry was referring to the fact that Cosmopterix clandestinella exits its mine to pupate, whereas C. gemmiferella pupates in the mine.

 
yes
I think that is true - but now it gets more complex. Nearby, I found a clump of what is probably a true D. clandestinum. It had a cauline leaf mine, in which there appears to be something pupating IN the mine.

I decided to seek out a patch of D. oligosanthes this morning, and some of these seem like they have basal leaf mines as well - though they don't appear to be occupied. (I have yet to get them to a scope). A disclaimer: the 'oligosanthes' are not currently in an identifiable state, but they were in an area in which the species was formerly dominant.

Some of these plants seem at first to completely lack basal leaves - but upon further inspection, they seem to have had leaves that are now decaying, after having full-leaf mines.... so miners might be having a pretty strong effect on these populations.

Are you interested in specimens?

 
Specimens
Sure, I haven't found any Cosmopterix on Dichanthelium up here, though I have an almost mature larva in a Carex leaf I collected a month ago. As I may have mentioned before, I haven't seen anything in the literature about what C. gemmiferella does with its frass, so the one pupating in the mine is especially interesting. That species is only known from Dichanthelium dichotomum.

Moved
Moved from Cosmopterix.

Moved

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