Apical segment of leg (ex McAlpine 1981).
In the Phyllomyzinae, there is apomorphically a comb-like row of setae posteroventrally on the first tarsomere of the hind leg. In the stem-species of Aldrichiomyza+Xenophyllomyza this comb is lost, and in Borneomyia tigra there are several rows of about three setae each anteroventrally along the first tarsomere
. These rows are arranged in a slightly diagonal direction.
The setae in the row of Phyllomyza securicornis and Neophyllomyza acyglossa look like normal setae, but in Paramyia sp. 1, Stomosis sp. 1, and Borneomyia tigra the tips of the setae are flattened. For an evaluation of the difference between setae with sharp tips and setae with flattened tips, a comparative study with the SEM is needed. I studied this character in only one species of each genus with the SEM, and so cannot generalise from the results.
(ex Brake 2000).
Virtually all Diptera have five tarsomeres (tarsal segments) on all legs. They are called the first (basitarsus, metatarsus, proximal tarsal segment), second, third, fourth, and fifth tarsomeres (ex McAlpine 1981).
pl.: tarsi