Erythrodiplax basifusca
| Erythrodiplax basifusca | ||||||||||||
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| Scientific name | ||||||||||||
| Erythrodiplax basifusca | ||||||||||||
| ( Calvert , 1895) |
Erythrodiplax basifusca is a species of dragonfly in the genus Erythrodiplax from the subfamily Sympetrinae . It occurs in the east of the USA and from there via Mexico and Chile to Argentina .
features
Construction of the Imago
The animal reaches a length of 26 to 30 mm, of which 18 to 24 mm is on the abdomen . The hind wings are between 21 mm and 26 mm long. This makes it a rather small type of dragonfly. As is usual in the genus of the erythrodiplax, the brownish or olive-colored body quickly turns into an ash-blue with the aging process. The top of the head becomes metallic blue or black in this species. The thorax largely has no conspiracies, but is immersed before the color change front in a darker brown and olive-side. The legs of the females are completely black. The wings usually have an amber-colored stain up to the first antenode vein, but can also be transparent. The basal segments of the stocky abdomen are swollen. The middle segments are flattened. As is usual in the genus, a sexual dimorphism is evident in the color, so the abdomen is brownish in the females while it is blue-black in the males. The cerci are black.
Construction of the larva
The larva has a hairless body except for the prothorax . The head is longer than the thorax with four notches on the lower jaw. The molar tooth formula is (2-4), but always without a molar dam. The third segment of the antennas is the longest. The paired side plates (ventrolateral plates) of the eleventh abdominal segment , the so-called paraproct , are smooth when viewed from the side.
Similar species
There are similarities, for example, to two representatives of their own genus, namely the Erythrodiplax fusca and the Erythrodiplax minuscula . The E. fusca distinguished in particular by their bright red hue. It can be distinguished from the second by the larger basal shadow.
Scientific considerations
The first description was in 1895 by Calvert . Until the year 2000 the species was synonymous with Erythrodiplax connata , but was then used by Needham et al. recognized as a species of its own. In 2003 these investigations were confirmed by Paulson.
Individual evidence
- ↑ a b c d http://odonatacentral.bfl.utexas.edu/fieldguide/species.asp?taxaid=254 ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (April 13, 2006)
- ↑ Muzón and Garré: Description of the last instar of Erythrodiplax paraguayensis (Aniosoptera: Libellulidae) . In: Rev. Soc. Entomol. Argent. . 64, 2005, pp. 85-91.
