Disholcaspis quercusmamma
Pointed bullet gall. Similar [to Disholcaspis quercusglobulus] but pointed at the apex, subclasping at base, often distorted by crowding and extending along the stem for several inches sometimes. Frequently on sprouts from stumps or on small trees in large numbers in the fall. On Q. macrocarpa and bicolor. Adults emerge Oct. 20-Nov. 10.
”- LH Weld: (1928) Cynipid Galls of the Chicago Area©
Reference: https://www.biodiversitylibrary.org/page/57505981#page/193/mode/1up