Dhysorina
Ross T. Bell
Introduction
This is a small subtribe of Rhysodini that contains three genera and about nine species. Dhysorina occur in the Southern Hemisphere. They are known from Africa (Dhysores), South America (Neodhysores), and New Zealand (Tangarona) but are absent from Australia and Madagascar.
A key to the genera is available here.
Characteristics
The head of Dhysorina has the frontal grooves absent to barely indicated. The internal cavity of the head opens by a pore in the occipital region. The minor setae of the outer antennal segments form subapical rings. The pronotum has paired basal impressions, each preceded by a discal striole. The elytron has seven striae. The middle and hind tibiae each have two small spurs.
Dorsal aspect of head and pronotum of Dhysores quadriimpressus.
Modified from Bell and Bell 1979. Copyright © 1979 Ross T. Bell and Joyce R. Bell.
Relationship of Dhysorina to Other Rhysodines
The rings of minor setae suggest a relationship with Omoglymmiina, Rhysodina, Medisorina, and Sloanoglymmiina. Further interpretation depends on whether the restricted, pore-like opening to the internal head cavity is a plesiomorphy or apomorphy. At present there is no decisive evidence on this point.
References
Bell, R. T. and J. R. Bell. 1978. Rhysodini of the World part I. A new classification of the tribe, and a synopsis of Omoglymmius subgenus Nitiglymmius, new subgenus (Coleoptera: Carabidae or Rhysodidae). Quaestiones Entomologicae 14: 43-88.
Bell, R. T. and J. R. Bell. 1979. Rhysodini of the World part II. Revisions of the smaller genera (Coleoptera: Carabidae or Rhysodidae). Quaestiones Entomologicae 15: 377-446.
Title Illustrations
| Scientific Name | Dhysores quadriimpressus |
|---|---|
| Location | Tanganyika: Amani |
| Specimen Condition | Dead Specimen |
| Identified By | R. T. Bell |
| Collection | CAS |
| Image Use |
 This media file is licensed under the Creative Commons Attribution License - Version 3.0.
|
| Copyright |
© 2000 David R. Maddison
|
| Scientific Name | Tangarona pensus |
|---|---|
| Location | New Zealand: NE of Parakao, Whangarai, Northland |
| Specimen Condition | Dead Specimen |
| Identified By | R. T. Bell |
| Collection | CAS |
| Image Use |
This media file is licensed under the Creative Commons Attribution License - Version 3.0.
|
| Copyright |
© 2000 David R. Maddison
|
About This Page
Ross T. Bell
University of Vermont, Burlington, Vermont, USA
Page copyright © 1999 Ross T. Bell
All Rights Reserved.
- First online 14 December 1999
Citing this page:
Bell, Ross T. 1999. Dhysorina. Version 14 December 1999 (under construction). http://tolweb.org/Dhysorina/1794/1999.12.14 in The Tree of Life Web Project, http://tolweb.org/
