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Photo#575347
Hackberry Gall (hairy hook-top) - Celticecis celtiphyllia

Hackberry Gall (hairy hook-top) - Celticecis celtiphyllia
Austin, Travis County, Texas, USA
September 11, 2011

Moved
Moved from Hackberry Gall Midges.
I think this is an immature or aborted Celticecis celtiphyllia. This species sometimes has a hook tip, and maybe is the only species that does.

 
C acuminata
I'm not certain but I think this is more likely C acuminata. That species seems to have much longer and denser hairs relative to the size of the gall, as seen here. It's also more likely to be found under the leaf, whereas C celtiphyllia apparently does show up there occasionally but is more commonly found on the upper midrib, petiole, twigs, etc.

 
As I recall, these were mostl
As I recall, these were mostly on the leaves. C. acumunata is usually on the stems, though. Right?

 
C acuminata
No, C acuminata occurs on the lower side of the leaf between the veins.

What I am wondering about now, though, is that Gagne doesn't include C acuminata occurring in Texas at all. There are many plausible observations of the species in Texas on iNat, but they may turn out to be young C capsularis galls instead. Charley has apparently made that call before, eg: https://bugguide.net/node/view/575346/bgimage

Either way I still don't think this is C celtiphyllia (which does occur mostly on stems, petioles, and upper midribs).

 
I uploaded some images today
I uploaded some images today on iNat from shots taken in my yard today. To my eye, it looks like two different kinds. One is sort of ribbed. The other is not. I've not cut any open yet. This year there don't seem to be as many Celticecis individuals. I see lots of Pachypsylla galls, though. I accidentally tagged the Celticecis observations as Pachypsylla when I uploaded them, but I've corrected that.

Moved
Moved from ID Request.
I would guess the hook indicates a different species.

I notice some of the galls ha
I notice some of the galls have hook-shaped structures, like this. Is that diagnostic for a different species, or is it, for example, just an exit structure or something?

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