Erythrodiplax acantha
| Erythrodiplax acantha | ||||||||||||
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| Erythrodiplax acantha | ||||||||||||
| Borror , 1942 |
Erythrodiplax acantha is a medium-sized species of dragonfly from the subfamily Sympetrinae . It occurs in the south of Brazil in the area around São Paulo . The name acantha - Greek άκανθα, ákantha "thorn", English for spinous process - is derived from the structure of the penis of the species. So far there is only one description of the male.
features
The face and thorax of Erythrodiplax acantha are black. Likewise, the abdomen, which reaches a length between 18.0 and 19.5 millimeters, and the legs are dark brown to black. The black of the face shimmers slightly metallic blue, that of the thorax brownish. The abdominal appendages are dark brown. The hind wings are between 23 and 24.5 millimeters long, and have a small yellowish-brown spot at the base. The extent of this area extends up to a maximum of half the distance to the first Antenodalader . Otherwise the wings are transparent. The wing mark ( pterostigma ) is between 3.3 and 3.5 millimeters long.
Similar species
Especially with Erythrodiplax hyalina and Erythrodiplax media the species is to be confused due to the overlapping flight areas. A distinction is very difficult and can only be made on the basis of the structure of the penis. The smaller and lighter spot in the hind wing compared to E. media , and the structure of the hamulus in E. hyalina also provide clues .
credentials
- ↑ a b c Donald Joyce Borror : A Revision of the Libelluline Genus Erythrodiplax (Odonata) [p. 198ff], The Ohio State University, Columbus, 1942
- ↑ Henrik Steinmann: World Catalog of Odonata (Volume II Anisoptera) [p. 446], de Gruyter, 1997, ISBN 3-110-14934-6
Web link
- Erythrodiplax acantha inthe IUCN Red List of Threatened Species 2013.2. Posted by: von Ellenrieder, N., 2007. Retrieved February 19, 2014.