Pityogenes calcaratus
| Pityogenes calcaratus | ||||||||||||
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Pityogenes calcaratus , female (right) and male (left), right side, magnified 40 times, adults, ex. Pinus halapensis , Rovinj , Istria , Croatia . |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Pityogenes calcaratus | ||||||||||||
| ( Eichhoff , 1879) |
Pityogenes calcaratus is a weevil from the subfamily of the bark beetle (Scolytinae). Since it creates its breeding systems in the bark of the host trees, it is counted among the bark breeders.
features
General
The beetles are 1.8 to 2.5 millimeters long and have a light brown cylindrical body. The throat plate is provided with a front rim fine humps, evenly curved, with dotted base and hidden when viewed from above the head. The base of the pronotum is unrimmed. It has a smooth, flat longitudinal callus at the back. Seen from below, the tip edge of the elytra is simple, immediately surrounding the abdomen . The sutural teeth are clearly visible. The wing covers are wider than long up to the sutural teeth. The abdomen remains straight from the second sternite towards the end. The third tarsal link is cylindrical in shape.
Sexual dimorphism
- Male animal : The second tooth on the fall is a large hook tooth. There are two small teeth between the hook tooth and the large conical tooth.
- Female animal : The forehead is covered with a triangular patch of short hair, with faint furrows next to it. Only small bumps can be found on the fall.
distribution
The species is common in Mediterranean countries .
Way of life
Pityogenes calcaratus occurs on Aleppo pine ( Pinus halapensis ) and occasionally on maritime pine ( Pinus pinaster ), black pine ( Pinus nigra ) and snake skin pine ( Pinus leucodermis ). It colonizes the bark of the trees. The feeding pattern shows a ramming chamber from which five to seven irregular mother tunnels branch off in a star shape. The animals are polygamous .
Systematics
Synonyms
The following synonyms are known from the literature for Pityogenes calcaratus :
- Pityogenes herballae Strohmeyer 1929
- Tomicus lipperti Henschel, 1885
- Pityogenes opacifrons Reitter, 1913
- Bostrichus calcaratus Eichhoff 1879
swell
Individual evidence
- ^ Pityogenes calcaratus (Eichhoff 1879). Fauna Europaea, Version 1.3, April 19, 2007 , accessed on September 19, 2008 .
literature
- Sabine Green : Manual for the determination of the European bark beetle Verlag M. & H. Schaper, Hanover 1979, ISBN 3-7944-0103-4
