Cynips tumifica

Callirhytis tumifica

Andricus tumificus

Andricus tumifica

Cynipidae

Melikaiella

Quercus coccinea

Alabama

Arkansas

Connecticut

Delaware

Georgia

Illinois

Indiana

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Mississippi

Missouri

New Hampshire

New Jersey

New York

North Carolina

Ohio

Pennsylvania

Rhode Island

South Carolina

Tennessee

Vermont

Virginia

West Virginia

Wisconsin

Quercus ellipsoidalis

Iowa

Minnesota

Ontario

Quercus rubra

Kansas

Nebraska

Oklahoma

Texas

New Brunswick

Nova Scotia

Prince Edward Island

Quebec

Quercus velutina

Florida

Cynipid galls of the eastern United States

Melikaiella tumifica (sexgen)

Callirhytis tumifica

Quercus coccinea, rubra, velutina
Leaf galls, integral
Fig 255. Midrib swelling at base of leaf blade or on petiole, many-celled, green, in May-June.

[Photo caption]
255. On Q rubra. Also on Q coccinea, velutina. Adults were emerging June 15 (IL).; July (VA).

Melikaiella tumifica (Osten Sacken) comb. n.

Cynips tumifica
Andricus tumificus
Callirhytis tumifica

Only the sexual generation is known to induce swelling-like galls on the midrib of the leaves on red oaks (Q. rubra and Q. velutina), distributed in several states of USA. Most of the galls are near the basis of the leaf, but sometime also on the petiole. Larval chambers are arranged in rows. Galls occur in spring, adults emerge in May and June.

Distribution. USA (New York, Virginia, North Carolina, Illinois, and Iowa).

A new genus of oak gallwasp, Melikaiella Pujade-Villar Hymenoptera: Cynipidae: Cynipini), from the Nearctic region

Melikaiella tumifica (Osten Sacken, 1865), asexual generation

Material examined: 15 asexual females labelled as “Germany, Baden-Württemberg, Schwetzinger Hardt, 10km SW of Heidelberg, ex acorns on Q. rubra, coll. R. Beiderbeck, 2014.10.01, emerge 2017.03.22”. 

Gall. Sexual generation gall (Fig. 119) is a large, multilocular thickening of the leaf midrib/petiole. 

Biology. See Beiderbeck (2012), Beiderbeck & Nicholls (2014), and Pujade-Villar et al. (2014) for the biology of this species. The sexual generation develops on Q. rubra and Q. velutina; the asexual only known so far from Q. rubra. Sexual generation leaf galls develop in early spring; adults emerge in May-June. Asexual acorn galls were found in October - November, maturing in November. Adults overwinter in galls and emerge in the following spring. 

Distribution. USA: New York, Virginia, North Carolina, Illinois, Iowa (Burks 1979). Also an introduced species in Germany (Heidelberg) on introduced Q. rubra (Beiderbeck 2012, Beiderbeck & Nicholls 2014).

Pairing of sexual and asexual generations of Nearctic oak gallwasps, with new synonyms and new species names (Hymenoptera: Cynipidae, Cynipini)

Quercus ellipsoidalis added tentatively as a host based on [this unconfirmed observation](https://www.inaturalist.org/observations/46990066). 

Gallformers ID Notes