Morphology and ultrastructure of the Dufour gland of Myzinum sp. (Tiphiidae)

By

Billen, Johan
Justino, Cíntia
Carnimeo, Fernando
Noll, Fernando Barbosa

Type

Article

Date of Publication

2017

Original Publication

Journal of Hymenoptera research

Volume

55

Pages

109-119

Subjects

curved sting , Dufour gland , Morphology , Myzinum , Tiphiidae , ultrastructure

Contributed by

Pensoft Publishers

Language

English

Published by

Washington, D.C International Society of Hymenopterists

Identifiers

DOI: https://doi.org/10.3897/jhr.55.11618

 

Abstract

The Dufour gland of two Myzinum females was studied with light and electron microscopy, and is formed by a large sac lined with a monolayered secretory epithelium. The epithelium displays a crenellate appearance, which is the result of the peculiar shape of the secretory cells, that have a cupola-like central portion and a more flattened appearance in the contact region with other cells. The ultrastructural organization is indicative for the elaboration of a non-proteinaceous secretion. The gland opens ventrally to the sting base, but does not open through the sting, as does the venom gland duct. The sting itself is dorsally curved, which may be a functional adaptation to facilitate stinging large beetle larvae from above, as these are the common hosts for tiphiid wasps.