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Witch-hazel Cone Gall Aphid?? - Hormaphis hamamelidis

Witch-hazel Cone Gall Aphid?? - Hormaphis hamamelidis
Old Orchard Beach, Maine, USA
I wonder if these are the Witch-hazel Cone Gall Aphid (Hormaphis hamamelidis)? If so, there is no page on BG that I could find. The galls might be made by the Red Cone Gall Wasp, but they don't look the same. The wasp's galls seem to curve under the body of the gall; these don't.

Images of this individual: tag all
Witch-hazel Cone Gall Aphid?? - Hormaphis hamamelidis Witch-hazel Cone Gall Aphid?? - Hormaphis hamamelidis

Moved from Aphids.

Yes, absolutely.
Gall insects are very host-specific, and the red cone gall wasp is on western oaks, not witch hazel. I've made a new guide page for your images.

witch hazel galls looking for more info
Do you know of any resouces that go into the generational cycles of these (aphids?) and similar species? They are facinating! The field guides I have don't agree and I'm not even sure what name to use, eriosomatidae?

Thanks for any direction you can send me off into.

One resource...
Is this one (1). It has good life cycle information on these and many other insects.

Aphid taxonomy has changed a lot over the years; these may have been considered part of Eriosomatidae back when that was a full family, but now it is subfamily Eriosomatinae in family Aphididae, and the witch hazel gall aphids belong to a separate subfamily, Hormaphidinae. The taxonomy on BugGuide follows the taxonomy on Aphid Species File. Tree of Life treats this group as a full family, Hormaphididae. The difference is explained as follows on their Aphidoidea page: "In the literature, some aphidologists refer to the families in the above phylogeny as subfamilies, and the names therefore possess the suffix -inae, rather than -idae. There is no extremely good reason to prefer one categorization over the other and fortunately this dichotomy in the literature has led to little confusion. However, the use of family designations, as above, has the single advantage of allowing slightly more detail in taxonomic hierarchies. Since most of aphid phylogenetics remains unknown, much of the aphid tree must be represented by taxonomic hierarchies and the extra room made available from a promotion of some authors' subfamilies to families is useful for our purposes. Note that this promotion has the effect of promoting some tribes to sub-family status, but these cases are always straightforward and can be recognized by the simple differences in suffixes."

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