Libellula vibrans
| Libellula vibrans | ||||||||||||
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Libellula vibrans |
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| Scientific name | ||||||||||||
| Libellula vibrans | ||||||||||||
| ( Fabricius , 1793) |
Great blue skimmer is a dragonfly - Art of the genus Libellula of the subfamily Libellulinae . The species is particularly widespread in the eastern United States . L. vibrans is the largest representative of the genus Libellula in the USA.
features
Construction of the Imago
The animal reaches a length of 50 to 63 millimeters, of which 37 to 43 millimeters are on the abdomen . The animal's face is white, and its thorax is brown except for a thin white dorsal line. At the side the thorax color changes into a light gray tone. On the third lateral structure of the thorax there is a dark line. The hind wing reaches a length between 46 and 52 millimeters and, like the fore wing, is predominantly transparent. There is a thin, dark line at the base and a dark spot at the node . The wing tips are black. The legs have a two-part color scheme. The femur is half gray and then turns black. The following tibia and tarsus are also black. The abdomen is yellow with a dorsal black stripe. However, the males turn a pale blue from the thorax downwards with age. The females, on the other hand, color their abdomen brown with age. Furthermore, the 8th segment is laterally greatly enlarged in the females.
Construction of the larva
The larvae have eyes located in the center of the face and a long abdomen that tapers towards the end. The edge of the unpaired front part of the labium , the so-called prementum, is smooth.
credentials
- ↑ a b http://odonatacentral.bfl.utexas.edu/fieldguide/species.asp?TaxaID=239 ( 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. (October 21, 2006)
- ↑ Jerrell James Daigle: Florida Dragonflies (Anisoptera): A Species Key to the Aquatic Larval Stages . In: Technical Series . 12, No. 1, November 1992, p. 23.
