Leiobunum religiosum
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| Simon , 1879 |
Leiobunum religiosum is a harvester fromthe Sclerosomatidae family . It is native to the southwestern Alps.
description
Males reach a body length of 4.0 to 5.5 millimeters. They have a dark stripe on the top of the body that is wide, black and uninterrupted. The top part of each leg (hip, coxa ) is marked with a black band at the end facing away from the body. The second (longest) leg measures about 81 millimeters. The penis is divided into two areas: the lower, smooth part (trunk) tapers conically and is articulated with the upper, shorter part (glans). The lower part is provided with lateral extensions (wings) at the end, these have a fine lamellar structure on the edge. The fine lamellae in male Leiobunum religiosum , however, vary according to the individual and age, and the state of conservation of collected specimens also influences these small structures. Muscles are only in the lower half of the trunk. The upper part is only slightly angled at the joint compared to the lower part; its widest point is wider than the tip of the lower part of the penis. In males, the pedipalps are characterized by closely spaced, pointed granules on the femur , some individual thorns are also present, the other parts of the pedipalp are only covered with bristles.
In females, a body length of 6.0 to 7.0 millimeters was measured, and a length of the second leg of 75 millimeters. The stripe on the top is not so clearly pronounced, with lighter transverse changes and points. The stripes on the coxa are also less visible in females. The receptaculum seminis is located in the fourth and fifth segments of the laying tube . The female pedipalps have hardly any tips or thorns.
Both sexes have in common the delicate chelicerae , which apart from bristles have no reinforcement; the Pedipalps, on the other hand, are quite robust. The legs are long and strong, round in cross-section, with irregular small bumps. The color of the legs is yellow-brown, the leg links are darker at the end facing away from the body and end with a white ring. The ocular hillock (tuber oculorum) is provided with a fold in the middle and has a few bristles, the lenses of the eyes are protruding.
Occurrence
The distribution area of Leiobunum religiosum is in the southwestern part of the Alps, in France and Italy. The species was found up to an altitude of 1100 meters. Probably it concerns a rock-dwelling harvester. Adults were found in August and September; this species probably forms only one generation per year. An isolated occurrence is known in the Mayener mining field in Rhineland-Palatinate , where the stenöke species was only found in the damp and cool microclimate of the quarry.
Similar species
Leiobunum religiosum is similar to the eastern alpine widespread Leiobunum subalpinum , which is not only darkly banded on the back, but almost completely black.
literature
- Jochen Martens: Harvesters, Opiliones . In: The animal world of Germany . tape 64 . VEB Gustav Fischer, Jena 1978.
- Axel L. Schönhofer, Jessica Hillen: Leiobunum religiosum: new for Germany (Arachnida: Opiliones) . In: Arachnological Messages . tape 33 , 2008, p. 25-30 ( PDF ).
Individual evidence
- ↑ Biodiversity in the Mercantour and Alpi Marittime natural parks (accessed October 21, 2009)