Identification of most Geomyza species is fraught with
difficulty from photographs alone and microscopic examination of the
genitalia is the only means of accurate identification. Geomyza
tripunctata seems to be fairly widespread in many parts of
Nottinghamshire, but the thorax colouration is typically darker than on
the two shown in the photographs here - hence the need for accurate
determination. All of the county's records are currently from the
west of the Trent Valley, probably due to recorder bias rather than
species distribution. Photographed in Market Warsop Cemetery, July 2020. |