comment added over 13 years ago by Istvan Miko
The callus might be equivalent with the area of the metapleuron delimted by the metapleural sulcus and the metapleural carina.
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.