Lunule

Crescentic median plate lying between the ptilinal fissure and the bases of the antennae

Lunule

Definition: 

Crescentic median plate lying between the ptilinal fissure and the bases of the antennae (McAlpine 1981)

Character evolution: 

The lunule is well developed in most Milichiidae and is quite large in Leptometopahead, frontal, SEM and some Milichia species. However, in several species of the Phyllomyzinae the lunule is partly covered by the anterior margin of the frons.
The lunule is bare in the stem-species pattern of the Chloropidae family-group and in most Schizophora. In cases where setae are present on the lunule in other schizophoran families, there are, so far as I know, several setae. The existence of exactly one pair of setae on the lunule is therefore an apomorphic character of the Milichiidae. Within the Milichiidae, these setae are lost in Borneomyia, Aldrichiomyza+Xenophyllomyza, Neophyllomyza, Pholeomyia nigricosta, Ulia, and most Paramyia species). In Milichia distinctipennis there are apomorphically two pairs of setulae on the lunule (from Brake 2000).

Syndicate content
Scratchpads developed and conceived by: Vince Smith, Simon Rycroft, Dave Roberts, Ben Scott...