Caryomyia turbinata Gagne, new species

Hosts: Carya glabra, ovata, texana, pallida, tomentosa

Gall (Figs. 123-125): Occasional, found on Eucarya hickories; usually in groups, on lower leaf surface between veins; height 2.8-4.2 mm, obconic to spheroidal, widest at midlength or beyond, apical third eventually collapsing and becoming flat; surface brown to red, covered with both short and long brown hair not quite obscuring surface, the hair darker and denser apically; base with narrow, circular, shallow, central depression, sometimes barely noticeable, the leaf not exfoliated surrounding connection, usually with small convex, discolored area on reverse leaf surface; larval chamber basal, depressed-ovoid, lined with yellowish membrane, tissue beyond larval chamber red, soft, with large and spongy cells. This gall is unique among Caryomyia galls for its obconic shape, but in other characters appears most similar to the conical galls because of the extraneous, soft tissue outside the pellicle-lined larval chamber.

Affinities. — The gall is unique in Caryomyia be- cause of its obconic shape, but the soft tissue of the distal half that eventually collapses brings to mind galls of, e.g., C. persicoides and C. turbanella. The male antennae and genitalia of the present species are quite different from the other two and more similar to the C. sanguinolenta group. The ovipositor is unlike that of either group, being similar to that of C. inclinata (Fig. 262).

Range: AL, AR, CT, FL, GA, IL, IN, KY, LA, MD, MA, MS, MO, NY, NC, OK, PA, TN, TX, VA, DC

- Raymond J. Gagne: (2008) The Gall Midges (Diptera: Cecidomyiidae) of Hickories (Juglandaceae: Carya)^©

Reference: https://www.biodiversitylibrary.org/page/38636615#page/90/mode/1up