Phylloxera foveata (Shimer)

Galls on leaves of Carya amara (= cordiformis) are small (1.5-8.4 mm diam.), with a dimpled central depression above, opening beneath leaf by a rounded downy orifice. Alatae were plentiful in late June. In Illinois, USA (Shimer 1869). The same leaves carried galls of P. minima and P. caryaesemen.

Phylloxera foveata

Carya sp.
Conical or globose leaf galls with distinct orifice and containing aphids
Gall medium, opening on the under surface, walls papery, quite flat, above, with a dimpled depression, the opening beneath round and with a downy orifice, diameter 1.5 mm, height 3 to 4 mm.

Phylloxera foveata Shimer.

Dactylosphaera foveatum
Phylloxera forcata

This appears to be nearest related to Ph. foveola n. sp. and Ph. intermedia n. sp., though as no opportunity has offered to further study foveatum at Washington, Shimer' s original description is reproduced:

"On the same leaves [of Carya amara] containing the small galls, Nos. 7 [Ph. minimum Shimer] and 8 [Ph. c. -semen Walsh] , I observed a number of larger ones with a dimpled depression above (which may be caused by the collapse of the thin paper- like centre), an opening beneath by a rounded, downy orifice, and having a diameter of .06-. 33 inch [1.5 mm] and a vertical depth of .12-. 16 inch [3-4 mm] ; all contained the female and her eggs, and some larvae."

Phylloxera foveata

There were no Phylloxera specimens or dried gall specimens in the U.S. National Collection for Phylloxera foveata (Shimer), so [it has] been designated as nomina dubia.