Massalongia papyriferae ( Gagne , 1967) Elsayed & Skuhravá & Ohta & Yoshida & Tokuda, 2020

Elsayed, Ayman Khamis, Skuhrava, Marcela, Ohta, Kazuki, Yoshida, Satoshi & Tokuda, Makoto, 2020, Revision of the birch-associated genus Massalongia (Diptera, Cecidomyiidae), with description of a new species from Japan and a taxonomic key to worldwide species, ZooKeys 958, pp. 1-27 : 1

Massalongia papyriferae ( Gagne, 1967) comb. nov.

Oligotrophus papyriferae Gagné, 1967: 132.

Apagodiplosis papyriferae Gagné, 1973: 862.

Description.

(Based on Gagné 1967, 1973). Head. Frons with 2-5 setae. Male flagellomere XII tapered distally.

Thorax. Anepimeron with 7-17 setae.

Female abdomen. Tergites I-VI bare posteromedially; tergite VII with entire posterior row of setae. Ovipositor: protrusible portion with pencil-shaped dorsal sclerite on posterior 2 thirds.

Male abdomen. Terminalia: gonostyli with blunt denticles; cerci rounded; hypoproct bilobed; aedeagus shorter than cerci and hypoproct.

Pupa. Antennal horns short; 2 setose lower facial papillae present; cephalic setae short. Abdominal terga covered with uniformly tiny spinules.

Larva. Spatula short, bilobed, with anterior lobes slightly curved toward each other. Terminal segment with 4 corniform papillae and 4 setose terminal papillae.

Distribution.

North America: Canada (Quebec) and USA (Washington, Oregon and Michigan) ( Gagné and Jaschhof 2017).

Gall and life history.

Massalongia papyriferae forms bud galls on the paper birch, B. papyrifera . The mature larva drops to the leaf litter to overwinter in a bottle-shaped cocoon. Adults emerge in spring ( Gagné 1967).

Remarks.

See under M. nakamuratetsui .