Remarkable 32 new wasp species from the distinctive Odontacolus and Cyphacolus genera

Remarkable 32 new wasp species from the distinctive Odontacolus and Cyphacolus genera
This image showsOdontacolus berryae, one of the newly described species where the distinctive horn of the genus is rather prominent Credit: A. A.Valerio & A. D. Austin

The wasp family Platygastridae is a large group of tiny, exclusively parasitoid wasps distributed worldwide. The genera Odontacolus and Cyphacolus, belonging to this family, are among the most distinctive wasps because of the peculiar hump-like formation on the rear part of their bodies. Despite their intriguing body shape, the generic status of these two groups has remained unclear. A new extensive study published in the open access Zookeys presents a morphological phylogenetic analysis including an astonishing 32 new species.

The peculiar shape of the so called horn structure on the back of these wasps is believed to be linked to the ovipositor system of the species. Only between 1 to maximum 2.5 mm long, these tiny wasps are actually vicious parasitoids, using their ovipositor to inject eggs into spider eggs, thus ensuring the development of their offspring at the expense of other species.

Previously considered to be relatively rare based on material available in collections, recent intensive collecting using Malaise and yellow-pan traps has revealed that some species of Odontacolus are moderately common, leading to the description of 32 species from across Africa, Australia and Asia.

Remarkable 32 new wasp species from the distinctive Odontacolus and Cyphacolus genera
This image shows one of the newly described species Odontacolus aldrovandii. Credit: A. A.Valerio & A. D. Austin

"This has been an intriguing study for several reasons; it has uncovered many new species of this group of ; their biology is particularly fascinating given they parasitise the eggs of , and their horn like structure makes them very easy to identify," comments Professor Andy Austin.


Explore further

9 new wasp species of the genus Paramblynotus described from Africa and Madagascar

More information: Valerio AA, Austin AD, Masner L, Johnson NF (2013) Systematics of Old World Odontacolus Kieffer s.l. (Hymenoptera, Platygastridae s.l.): parasitoids of spider eggs. ZooKeys 314: 1. doi: 10.3897/zookeys.314.3475
Journal information: ZooKeys

Provided by Pensoft Publishers
Citation: Remarkable 32 new wasp species from the distinctive Odontacolus and Cyphacolus genera (2013, July 3) retrieved 25 August 2019 from https://phys.org/news/2013-07-remarkable-wasp-species-distinctive-odontacolus.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
0 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more