alternative definition added over 15 years ago by Istvan Miko
Dilator muscle of the first metasomal spiracle; originates from the ventral part of the metapectal-propodeal complex just dorsal to the posterior end of the metapleural ridge.
Reference: Mikó, I., L. Vilhelmsen, N. F. Johnson, L. Masner , and Z. Pénzes. 2007. Morphology of Scelionidae (Hymenoptera: Platygastroidea): head and mesosoma. Zootaxa 1571:1-78.
Cross reference:
None provided.