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Superfamily Eriophyoidea

witch's broom on hackberry - Aceria celtis wart-like leaf gall on Box Elder (Acer negundo) - Aceria negundi Mite gall on Boxelder, under side of leafX - Aceria negundi gall Gall mite, specimen 1, air mounted, ventral - Trisetacus Some sort of mite? On Tilia cordata - Eriophyes leiosoma Aceria campestricola Eriophyid,
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Subclass Acari (Mites and Ticks)
Superorder Acariformes
Order Trombidiformes
Suborder Prostigmata (Prostigs)
Infraorder Eleutherengona
No Taxon (Raphignathina)
Superfamily Eriophyoidea
Explanation of Names
Eriophyoidea Nalepa, 1898
3 families (1):
Family Phytoptidae Murray, 1877 (20 genera, 164 species)
Family Eriophyidae Nalepa, 1898 (274 genera, 3,790 species)
Family Diptilomiopidae Keifer, 1944 (63 genera, 450 species)

From A Manual of Acarology, 3rd Ed. By G.W. Krantz and D.E. Walter (2):
"Following Keifer (1975); Amrine and Stasny (1994): Lindquist and Amrine (1996); and Amrine, Stasny, and Flechtmann (2003), three families of Eriophyoidea are recognized here: (1) PHYTOPTIDAE (including the subfamilv Nalepellinae with tribes Nalepellini, Trisetacini, and Pentasetacini, all of which have been treated as separate families by some authors (e.g., Shevchenko, Bagnyuk. and Sukhareva 1991; Bagnyuk, Sukhareva, and Shevchenko 1997); (2) the ERIOPHYIDAE (including the subfamily Ashieldophyinae, which was originally proposed as a separate family by Mohanasundaram (1984)); and (3) the DIPTILOMIOPIDAE." (emphasis added).
Internet References
ITIS (Integrated Taxonomic Information System)
Works Cited
1.Order Trombidiformes Reuter, 1909. In: Zhang Z.-Q. (ed.) Animal biodiversity: An outline of higher-level classification...
Zhang ZQ, Fan QH, Pesic V, Smit H, Bochkov AV, Khaustov AA, Baker A, Wohltmann A, Wen T, Amrine JW, Beron P, Lin J, Gabrys G... 2011. Zootaxa 3148: 129–138.
2.A manual of acarology, 3rd Ed.
G.W. Krantz and D.E. Walter. 2009. Texas Tech University Press.