Oh my goodness! Unless you are a Tree of Life developer, you really shouldn't be here. This page is part of our beta test site, where we develop new features for the ToL, often messing up a thing or two in the process. Please visit the official version of this page, which is available here.
Under Construction

Dinapsis

Scott Richard Shaw
Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window
taxon links [down<--]Megalyridae Interpreting the tree
close box

This tree diagram shows the relationships between several groups of organisms.

The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.

example of a tree diagram

You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.

For more information on ToL tree formatting, please see Interpreting the Tree or Classification. To learn more about phylogenetic trees, please visit our Phylogenetic Biology pages.

close box
Containing group: Megalyroidea

Introduction

Dinapsis is known only from the southern Afrotropical region. For many years the genus was known only by the type-species, Dinapsis turneri, described by Waterston (1922) from a single specimen collected in South Africa (Cape Province). Hedqvist (1967) described an additional five new species of Dinapsis (Shaw 1990b). Recent collections from Madagascar by a research team from the California Academy of Sciences has yielded specimens of at least 17 additional undescribed species. The biology of Dinapsis is not known, but these wasps have been successfully collected by Malaise traps and yellow pans placed in areas of primary forest. The genus is currently being revised by the author.

Characteristics

Dinapsis species are small wasps ranging from 2.5 to 4.5 mm in length.  Males are distinctly smaller than females.  Some species are black or brown, while others are orange or reddish brown with bright yellow or white markings.  Synapomorphies for Dinapsis species include the distinctive coloration of the antenna, the unusual form of the fore wing venation, and the distictive pattern of propodeal sculpture.  The antennal flagellum is banded with a white annulus (ring).  The radial sector of the fore wing curves abruptly towards the anterior wing margin, forming a short and distictive marginal cell.  The propodeum is strongly sculptured with several parallel longitudinal carinae (ridges), and variable numbers of transverse (cross) carinae.

Discussion of Phylogenetic Relationships

The genus Dinapsis is the sister-group to the Oriental genus Ettchellsia (Shaw, 1990b).  The arrangement of species given here is based on an analysis of 26 external morphological characters (Shaw, unpublished data).  It should be kept in mind that this is only a preliminary framework for understanding dinapsine diversity based on the species named so far (there are at least 17 undescribed species from Madagascar, not yet included in this tree).  Two aspects are worth mentioning.  First, the South African species, D. turneri, appears to be the most basal lineage in the genus.  Second, the Madagascar species appear to comprise a monophyletic group that is hyperdiverse in that area.

References

Hedqvist, K.V. 1967. Notes on Megalyridae [Hym. Ichneumonoidea] and description of new species from Madagascar. Annal. Soc. ent. Fr. (N.S.) 3:239-246.

Shaw, S. R. 1990b. Phylogeny and biogeography of the parasitoid wasp family Megalyridae (Hymenoptera). Journal of Biogeography 17:569-581.

Waterston, J. 1922. A new family of Hymenoptera from South Africa. Annals and Magazine of Natural History (9)10:418-420.

Information on the Internet

Title Illustrations
Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window
Scientific Name Dinapsis species
Location (Madagascar) in Natural History Museum, Paris
Specimen Condition Dead Specimen
Identified By S. R. Shaw
Life Cycle Stage adult
Copyright © 2005 Simon van Noort
About This Page

Scott Richard Shaw
University of Wyoming, Laramie, Wyoming, USA

Correspondence regarding this page should be directed to Scott Richard Shaw at

All Rights Reserved.

Citing this page:

Shaw, Scott Richard. 2005. Dinapsis. Version 18 February 2005 (under construction). http://tolweb.org/Dinapsis/28845/2005.02.18 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life Branch Page.

Each ToL branch page provides a synopsis of the characteristics of a group of organisms representing a branch of the Tree of Life. The major distinction between a branch and a leaf of the Tree of Life is that each branch can be further subdivided into descendent branches, that is, subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box

Dinapsis

Page Content

articles & notes

collections

people

Explore Other Groups

random page

  go to the Tree of Life home page
top