Systropha curvicornis
| Systropha curvicornis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Systropha curvicornis | ||||||||||||
| ( Scopoli , 1770) |
Systropha curvicornis is a bee from the family of Halictidae and genus of systropha ( Systropha ).
features
This species differs from the other species native to Central Europe, Systropha planidens , in its somewhat smaller size of just under 1 cm. On the abdomen, the female has gray-white hairs in front, black-brown behind and an extended second antenna whip-whip. The male has a long, pointed spine on the second and third abdominal segments on both sides and a broadly bulged seventh back segment.
distribution
The distribution area of Systropha curvicornis covers the warmer part of Europe from Spain in the west to the southern foothills of the Urals in the east. In the north it goes to the south of Lithuania . In Germany, the main area of distribution is in Berlin and Brandenburg . Other current occurrences are known from Saxony-Anhalt , only older, partly uncertain evidence is available from other areas. Secure evidence from Baden-Württemberg dates back to 1966.
habitat
In Central Europe, Systropha curvicornis is restricted to heat islands, the habitats are dry, well-sunlit areas with large areas free of vegetation. It is one of the pioneering species in open locations, but its possibilities for spreading are limited by a high need for warmth and binding to a certain pollen source ( bindweed ).
Natural habitats are presumably open land biotopes such as inland dunes and eruption edges, but also areas free of vegetation due to overgrazing . However, the current evidence in Berlin and Brandenburg was also often made on secondary habitats that were artificially kept free of vegetation: military training areas, airfields, freight yards, the border strip between East and West Germany and a motocross area. A heavy use of this area hardly seems to affect the species, but the main threats to the populations are changes in use and the redesign of the areas, which lead to increased vegetation and bushes.
Danger
The species has recently been found in numerous places, especially in Brandenburg. Nevertheless, its existence is threatened by its attachment to a certain type of habitat and also to a certain plant as a pollen supplier. In the Brandenburg Red List , it is listed at level 3, “endangered”.
literature
- Flügel, Hans-Joachim (1998): On the biology and distribution of Systropha curvicornis in Berlin and Brandenburg , in: bembiX 10 (1998): 21–28; Bielefeld.