Ten-point club wasp
| Ten-point club wasp | ||||||||||||
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| Sapygina decemguttata | ||||||||||||
| ( Jurine , 1807) |
The ten-point club wasp ( Sapygina decemguttata ) is a hymenoptera from the family of the club wasps (Sapygidae).
features
The ten-point club wasp reaches a body length of 6.5 to 9 millimeters. They are dark in color, on the side of the tergites there are ten small white spots that have led to the German name for the club wasp. The antennae lobes, which are the thickening at the tip of the antennae , which is particularly pronounced in the males of the club wasps , are only weakly developed in this species.
The eggs are 1.25 millimeters long and 0.25 millimeters wide, shiny and tapering at one end. The larva of the ten-point club wasp has an orange-red, square head and a white, very shiny body. With the dagger-shaped mandibles , it can attack and kill competitors of its own species or the larvae of the common holey bees , in whose brood cells it develops as a parasitoid .
Occurrence
The species is widespread in southern and central Europe, but quite rare in the north. It settles on dry forest edges, clearcuts, ruderal areas and in the settlement area also dead wood. The animals fly from mid-June to late August. Only one generation is trained per year, which means that the animals are univolted .
Way of life
The ten-point club wasp parasitizes the common hole bee ( Heriades truncorum ). This lays its brood cells one behind the other in small holes in the wood or in stalks. Of the ten-point club wasp, the outer nesting cells of the holey bee that do not face south and have a passage diameter of around 3.5 millimeters are preferred. The female ten-point club wasp inspects the nest by crawling head first into the hole. If it has already been filled with food for its brood by a female of the common holey bee, the club wasp comes out again and lays an egg with its long laying stinger in the middle of the pollen stocks of the host's nest while the host female is on the way to obtain further food or is just finished with it.
After the larva of the ten-point club wasp has hatched, it first searches the entire host cell for conspecifics, which may be attacked and killed. Then the host egg or host larva, which can clearly exceed the size of the club wasp larva, is attacked and eaten in five to seven days. The hibernation takes place as a larva in a white cocoon , which is equipped with red-brown fecal balls. The puppet rest lasts 14 to 25 days. After the metamorphosis and hatching from the pupal shell, the imago remains inside the nest for up to 11 more days and leaves it just before or at the same time as the holey bees from the rear brood cells.
To acquire food, the adults of the ten-point club wasp visit the inflorescences of the daisy family , where they ingest nectar with their short, broad tongue .
Individual evidence
- ↑ a b c d Paul Westrich: On the biology of the club wasp Sapygina decemguttata (Jurine) (Hymenoptera, Sapygidae). Carolinea, 41, pp. 134-136, 1983 PDF
literature
- Rolf Witt: Wasps. Observe, determine. Naturbuch-Verlag, Augsburg 1998, ISBN 3-89440-243-1
Web links
- Sapygina decemguttata in Fauna Europaea
- Wild bee parasitoids: Club wasps (Sapygidae) at Wildbienen.de, with numerous photos, accessed on March 2, 2015
- Mace wasps (Sapygidae) at Fascination Wild Bees, with numerous photos, accessed on March 2, 2015