Swell maids
| Swell maids | ||||||||||||
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Hatching spring damsel (here Cordulegaster bidentata ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Cordulegastridae | ||||||||||||
| Calvert , 1893 |
The spring damsel (Cordulegastridae, Syn .: Cordulegasteridae Tillyard 1917 ) are a family of the dragonflies (Anisoptera) and the only representatives of the superfamily of the Cordulegastroidae. They also belong to the dragonflies (Odonata).
In Central Europe there are three species of this family, known as the great spring damsel ( Cordulegaster heros ), the striped spring damsel ( Cordulegaster bidentata ) and the two- striped spring damsel ( Cordulegaster boltonii ). The latter also has a form classified as a subspecies with the name C. boltonii immaculifrons .
The native spring maiden reach a wingspan of up to 10.5 centimeters and are markedly black and yellow, whereby the two-striped spring maiden wears one large and one small band on each segment on its black abdomen, the striped spring maiden only one large one. The ovipositor of the female is stiletto-shaped and protrudes over the rear end. The eyes are green or bluish.
The spring damsel need relatively clean and fast flowing water for the development of their larvae. For this reason, the populations of both species are in decline in large parts of their range. The adults fly from June to September and are mainly found in mountain streams and lowland streams with good water quality.
To lay their eggs, the females fly vertically over the water and use their ovipositor to pierce the eggs into the bottom of the water. The hatching larvae burrow further into the substrate, so that only the head and the front end with the front legs peek out.
The development time of these animals takes about three to five years, during which time the larvae reach a total length of 45 millimeters.
Genera
According to the Catalog of Life , the Cordulegastridae family includes the following six genera:
- Anotogaster Selys, 1854
- Chlorogomphus Selys, 1854
- Cordulegaster Leach, 1815, e.g. B. Striped spring damsel ( C. bidentata ), two- striped spring damsel ( C. boltonii )
- Neallogaster Cowley, 1934
- Sinorogomphus Carle, 1995
- Watanabeopetalia Karube, 2002
literature
- Buchwald (1988): The striped spring damsel Cordulegaster bidentatus (Odonata) in southwest Germany . Carolinea 46, 49-64
- Donath (1989): Distribution and ecology of the two-striped spring damsel Cordulegaster boltonii (Donovan 1807) in the GDR . Faun. Depending on state Mus. Tierk. Dresden 16, 97-106
- Sternberg, K. & R. Buchwald (Eds.) (2000): Die Libellen Baden-Württemberg. Volume 2: Dragonflies (Anisoptera). Ulmer, Stuttgart, ISBN 3-8001-3514-0
Web links
- Fam.Cordulegasteridae spring damsel ( memento from July 25, 2008 in the Internet Archive )
- Spring damsel (Cordulegasteridae): insects ( Memento from February 21, 2005 in the Internet Archive )
Individual evidence
- ↑ Cordulegastridae in The Species 2000 & ITIS Catalog of Life: 2010 Annual Checklist (accessed April 25, 2010)