Striped hawk fly
| Striped hawk fly | ||||||||||||
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Striped hawk fly ( Dioctria linearis ♀) with Anthocoris nemorum as prey |
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| Scientific name | ||||||||||||
| Dioctria linearis | ||||||||||||
| ( Fabricius , 1787) |
The striped hawk fly , scientific name Dioctria linearis , is a species of predator flies that is widespread in Europe . It is mainly found in forests.
features
The species reaches a body length of 9 to 13 millimeters, it has a narrow body structure with relatively long antennae that are longer than the eyes high. The head has two large compound eyes , when viewed from the side it initially appears to consist almost entirely of the eyes, the face is flat, the facial hump, which is characteristic of the genus Cryptopogon and visible in profile, is missing. The "gag beard" (Mystax) typical of the Asilidae is only weakly developed and limited to the edge of the mouth, it is yellowish in color. The trunk is mostly black and sometimes has two small red dots. An important feature to distinguish it from other Dioctria species is the pollination of the pleura on the sides of the trunk (thorax). In the case of Dioctria linearis , this is limited to two zones and does not form a closed ring. As with the related species, the upper side of the thorax is gray due to dense pollination, in which four unpolluted and therefore dark, shiny longitudinal lines are embedded, from which the species name linearis is derived. The legs, including the hips, are predominantly yellow-orange to yellow in color, the thighs of the hind legs are also predominantly yellow (in the related Dioctria longicornis they have a wide, dark ring). The narrow abdomen is predominantly black in color and has narrow, light rings. The female ovipositor has no thorns in the genus.
Way of life
The striped hawk fly is a widespread species with a population centered in forests and on the edges of forests. The flight time is in summer, with the peak in June and July.
distribution
The species is distributed over large parts of Europe and occurs in western, central and eastern Europe as far as European Russia, as well as in southern Great Britain . The northern Scandinavia and the Mediterranean region are without evidence, while the northern Balkans, south to Bulgaria, belongs to the distribution area. Evidence from Iran is given, while no evidence is available from Turkey.
The species is widespread in Germany, finds have been found from all parts of the country, but in Bavaria it is listed on the Red List in Category 2, severely endangered. It is also considered rare in Austria, while in the Netherlands it is one of the most widespread species of the family.
Taxonomy
The genus Dioctria comprises 133 species and is distributed almost worldwide. 13 species have been identified from Germany. She belongs to the Dioctriini tribe. Depending on the author, this is placed in its own subfamily Dioctriinae or in a broader subfamily Stenopogoninae.
Individual evidence
- ↑ a b Identification key for Dioctria species, from Fritz Geller-Grimm: Photo atlas and identification key for predatory flies in Germany
- ↑ a b Klaus von der Dunk (1996): Identification key for robber flies (Dipt., Asilidae). Galathea, reports of the Nuremberg Entomologists 12/4: 131-146.
- ^ CM Drake: Provisional atlas of the Larger Brachycera (Diptera of Britain and Ireland. Biological Records Center, NERC Institute of Terrestrial Ecology, Monks Wood Experimental Station, Huntingdon, UK. 1990. ISBN 1-870393-14-7 )
- ↑ Rustem Hayat, Hassan Ghahari, Robert Lavigne, Hadi Ostrovan (2008): Iranian Asilidae (Insecta: Diptera). Turkish Journal of Zoology 32: 175-195.
- ↑ Fatma Bayakdar, Abdullah Hasbenli (2009): Contribution to the Geographic Distribution of Dioctria Meigen, 1803 Genus (Diptera, Asilidae). Turkish Journal of Zoology 33: 23-26.
- ↑ Dioctria linearis (FABRICIUS, 1787) - Striped hawk fly in the atlas of predatory flies in Germany, edited by Danny Wolff
- ↑ Klaus von der Dunk: Red List of Endangered Predator Flies (Diptera, Asilidae) Bavaria. PDF download from the Bavarian State Office for the Environment
- ^ Marieke Schouten, Aat Barendregt, Pita Verweij, Mark van Veen (2003): Roofvliegverspreiding in Nederland; trapsgewijs toenemende soortenrijkdom. Entomological Reports 63 (6): 157-164.
- ^ PA Lehr (2001): Robber Flies of the Subfamily Dioctriinae stat.n. (Diptera, Asilidae) from Asia: 1. Taxonomy, Ecology and Phylogeny. Entomological Review 81: 59-70.
