Elga leptostyla
| Elga leptostyla | ||||||||||||
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| Scientific name | ||||||||||||
| Elga leptostyla | ||||||||||||
| Ris , 1909 |
Elga leptostyla is one of the two species of dragonfly in the genus Elga from the subfamily Brachydiplacinae . The species was first described in 1911 by Friedrich Ris using a male from South America . Since he already mentioned the species in his first volume in 1909, the official year is 1909.
Construction of the Imago
The approximately 20 millimeters long, thin abdomen of the males is black and has yellow markings. This consists of a ring on the second segment that is not completely closed at the top. There are large spots on the pages of the third segment. The sixth to eighth segments have yellow spots and the seventh a double spot. The second as well as the seventh to ninth segment are thickened, so that a spindle shape results. The chest ( thorax ) is black with a greenish yellow pattern in the males. There is a stain directly at the shoulder seam. The legs are black except for the yellow inside of the femur . In the males, the lower lip is whitish yellow with a diffuse, broad blackish piece in the middle. The upper lip is yellow-brown and the face is olive-green. The adjoining forehead is reddish brown and the parietal bladder is metallic blue. The hind wings are about 20 millimeters long. Both pairs of wings are diffuse yellow. The wing mark ( pterostigma ) measures under 2 millimeters.
credentials
- ^ Garrison, von Ellenrieder , Louton: Dragonfly Genera of the New World. The Johns Hopkins University Press, Baltimore 2006, ISBN 0801884462 , p. 239 ( PDF file) .
- ↑ a b Friedrich Ris: Libellulins . (pdf) In: Selys-Longchamps, Edmond de, baron, 1813–1900. Collections zoologiques; catalog systematique et descriptif . 2, 1911, pp. 398-399. Retrieved May 31, 2009.