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A COMPARATIVE MORPHOLOGY OF THE VENOM APPARATUS OF FEMALE BRACONIDS (HYMENOPTERA: BRACONIDAE)1

Published online by Cambridge University Press:  31 May 2012

Kathryn M. Edson  and
S. Bradleigh Vinson
Kathryn M. Edson
Affiliation:
Department of Entomology, Texas A&M University, College Station, Texas 77843
S. Bradleigh Vinson
Affiliation:
Department of Entomology, Texas A&M University, College Station, Texas 77843
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Abstract

The venom apparatus was examined in 160 species of female Braconidae. The venom apparatus is illustrated for females of 26 representative genera and those of the remaining females are described.

Our findings indicate that there are two types of venom apparatus present in Braconidae. Type 1 is found in females of subfamilies having more ancestral character states: Doryctinae, Spathiinae, Braconinae, Opiinae, Rogadinae, Alysiinae, and Ichneutinae. Typically, type 1 venom apparatus consists of a cone-shaped reservoir which is surrounded by many longitudinal and circular muscles and lined with a relatively thick cuticular intima, gland filaments, and a venom duct. Type 2 is found in females of subfamilies having more derived character states: Cheloninae, Microgasterinae, Agathidinae, Macrocentrinae, Helconinae, Neoneurinae, Centistinae, Paxylommatinae, and Euphorinae. Typically, type 2 consists of a thin-walled reservoir surrounded by relatively few muscles, two gland filaments, and a venom duct.

The Aphidiinae is the only subfamily in which the females examined have both types of venom apparatus represented. Of those genera examined, only females of Praon have type 2, while females of the remaining genera have type 1 venom apparatus.

Braconid females with type 1 venom apparatus are either ectoparasitoids or endoparasitoids which pupate within the host remains, while those females with type 2 are endoparasitoids which pupate outside the host remains.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 9 , September 1979 , pp. 1013 - 1024
Copyright
Copyright © Entomological Society of Canada 1979

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