Burmapeza, Grimaldi, 2018

Grimaldi, David A., 2018, Basal Cyclorrhapha In Amber From The Cretaceous And Tertiary (Insecta: Diptera), And Their Relationships: Brachycera In Cretaceous Amber Part Ix David A. Grimaldi, Bulletin of the American Museum of Natural History 2018 (423), pp. 1-97 : 1-97

Burmapeza , new genus

DIAGNOSIS: (female only). Acrostichals numerous, scattered, not in rows; prescutellum present, scutellum setulose; wing membrane entirely covered with microtrichia; M 1 -M 2 fork short, asymmetrical; apices M 2, CuA 1, A 1 +CuA 2 incomplete; crossvein dm-cu 2.5× its length from wing margin. Tibiae and tarsi without bifid scales. Basal flagellomere subcircular, arista dorsal.

TYPE SPECIES: B. radicis , new species.

ETYMOLOGY: Referring to the country of origin, and - peza (“foot”), a common suffix for genera of Platypezinae .

COMMENTS: Like Electrosania in New Jersey amber, this is a basal, stem-group genus of Platypezidae (fig. 27), based on the numerous, scattered acrostichals; retention of a prescutellum; absence of dark, bifid scales on the legs; and metatarsi unmodified. It is placed in Platypezidae based on the C vein ending at the tip of M 1 (vs. being circumambient) and the short M 1 -M 2 fork. The short, subcircular basal flagellomere is unusual, though not unique in Platypezidae . Melanderomyia and Microsania also have a short basiflagellomere (though usually reniform); the dorsal arista in Burmapeza , however, is unique within the family, a feature commonly seen in Syrphidae , Platypezidae , Phoridae , and Schizophora. Burmapeza can be clearly excluded from any of those cyclorrhaphan groups, and the antennal structure is considered here to be convergent.