Cerodontha (Xenophytomyza) Frey

Lonsdale, Owen, 2021, Manual of North American Agromyzidae (Diptera, Schizophora), with revision of the fauna of the " Delmarva " states, ZooKeys 1051, pp. 1-481 : 1

Cerodontha (Xenophytomyza) Frey

Cerodontha (Xenophytomyza) Frey, 1946: 51. Type species: Haplomyza atronitens Hendel 1920, by original designation. Frick 1959: 396; Nowakowski 1967: 655; Spencer and Steyskal 1986b: 91; Boucher 2003: 2.

Xenophytomyza . Hering 1955: 170.

Xenophytomyza is primarily north temperate in distribution, with seven exclusively Palaearctic species (mostly Russian), one Holarctic and Jamaican species, and one eastern Nearctic species. The three species with known hosts have all been reared from Poaceae (Boucher 2003).

The single Delmarva species is distinct among other local Agromyzidae in having three dorsocentrals that strongly decrease in length anteriorly, and there is a mix of characters seen in other Cerodontha subgenera: the lateral scutellar seta is absent (also seen in Cerodontha s. s.), the first flagellomere has a strong anterodorsal angle (but not produced to a point as seen in Cerodontha s. s.), the lunule is narrow and slightly higher than wide (similar to some Poemyza ) and the body is darkly pigmented. Support for the subgenus is weak and its relationships to other subgenera require investigation (Boucher 2003).