Disholcaspis edura

[Photos of this gall appear on page 10 of the pdf]

Disholcaspis edura

Quercus arizonica, oblongifolia, reticulata [rugosa], subturbinella [turbinella]
Stem galls
Detachable
Fig 55.

Disholcaspis edura, new species

Hosts: Quercus oblongifolia, arizonica, toumeyi, reticulata [rugosa]

Gall: A bullet gall in clusters of 3-6 on twigs, sessile, rounded at end, yellowish, up to 12 mm in diameter. Larval cell basal, its wall unusually thick and hard, persisting after the soft distal tissue has weathered away.

Habitat: The types are from galls collected at Nogales, Ariz., Nov. 14, 1939, on Quercus oblongifolia Torr. Adults emerged Jan. 11 to Feb. 11, 1940. Paratypes are from galls collected at Magdalena, N. Mex., Nov. 9, 1921, then containing adults which emerged December 31. One paratype is from Patagonia, Ariz., and one from Oracle, Ariz. These galls have been noted also on Quercus toumeyi Sarg. and Q. reticulata Humb. & Bonpl.

Adults emerged December 31.

Disholcaspis edura
Clustered-gall wasp
[Page 171]

Hosts: Quercus arizonica, oblongifolia

These monothalamous-polythalamous galls are generally rounded and occur in tight compact clusters that can exceed 40 mm in length.

Range: northern Coconino forest south to the Sky Islands of southern AZ