Ernst August Girschner [SEP] occupation
Ernst August Girschner
Ernst August Girschner, usually just Ernst Girschner (29 October 1860 – 28 April 1914) was a German entomologist who specialised in Diptera.
Girschner was born (and died) in Torgau, Province of Saxony. He taught at the Gymnasium in Torgau. Girschner described many new species of Diptera but made much more important contributions notably formalising the use of chaetotaxy in Calyptratae "it was the merit of Mr. E. Girschner to give to Chaetotaxy a much greater development and application than it had had before, and
Chaetotaxy
Chaetotaxy is the arrangement of bristles (macrochaetae) on an insect or mite, or taxonomy based on their position and size. For example, it is important in Diptera, in which group it was formalised by Ernst August Girschner. The term chaetotaxy was later proposed by Carl Robert Osten-Sacken.
The chaetotaxy of a fly might include :- acrostichal, dorsocentral, humeral, mesopleural, sternopleural, notopleural, postalar, supraalar and scutellar bristles on the thorax; dorsal, posterodorsal, anterodorsal, ventral, posteroventral