Rhombus bug
| Rhombus bug | ||||||||||||
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Rhombe bug ( Syromastus rhombeus ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Syromastus rhombeus | ||||||||||||
| ( Linnaeus , 1767) |
The rhombus bug ( Syromastus rhombeus ) is a bug from the family of the border bugs (Coreidae). It is the only member of the genus Syromastus and occurs in the Palearctic .
features
These bugs reach body lengths between 9.5 and 11.5 millimeters. The body is clay-yellow to yellow-brown in color and has numerous fine, dark-brown point pits. A characteristic feature of the species is the laterally clearly rhombic widened abdomen. The connexive is at its widest point more than twice as wide as the clavus . This gave the species its name. The front sides of the pronotum are whitish in color. The first antenna segment is triangular, yellow-brown and densely granular. The second antenna segment is also triangular and reddish. The third antenna segment is round and reddish. The fourth antenna segment is spindle-shaped and black. The antennae have no extension inside. The tylus is extended forward. The cheeks are not visible from above. The sides of the head behind the eyes are each provided with a pointed hump.
Occurrence
The species is widespread and common in Europe from southern Scandinavia to the Mediterranean area. They are rarer in the flatlands of the north than in the low mountain ranges of Central Europe. They are found everywhere on warm locations clove plants (Caryophyllaceae), such as on Spark ( Spergula ), Horn herbs ( Cerastium ), carnation ( Dianthus ), Leimkräutern ( Silene ), herniaria ( Herniaria ) and sand herbs ( Arenaria ).
Way of life
The animals suck the sap of their host plants. The larvae are mostly found on the ground, the adults sit on the plants and fly around when the conditions are favorable. The rhombus bug overwinters as an imago in dry litter, under trees or in grass clusters, occasionally also far away from its host plants. Mating takes place after wintering from late April to early June. The females then lay their eggs either on the stems of their host plants or in the litter below the plants. The larvae that hatch develop between June and September, the adults of the new generation can be found in a long period between the end of July and October.
literature
- Ekkehard Wachmann , Albert Melber, Jürgen Deckert: Bugs Volume 3: Aradidae, Lygaeidae, Piesmatidae, Berytidae, Pyrrhocoridae, Alydidae, Coreidae, Rhopalidae, Stenocephalidae. Goecke & Evers, Keltern 2007, pp. 218-220, ISBN 978-3-937783-29-1 .
- Frieder Sauer : bugs and cicadas. Fauna-Verlag, Karlsfeld 1996, ISBN 3-923-01012-5 .
- Franz Schmolke: Identification key of the Coreidae family (leather or border bugs) from Bavaria. In: F. Schmolke, M. Bräu & K. Schönitzer: Interesting bug finds from Bavaria with special consideration of the Coreoidea (Insecta: Heteroptera, Geocorisae): Contribution z. Bavarian Entomofaunistik 8, 2006, pp. 131–181 ( PDF; 763 kB; excerpt online ).
Web links
- Syromastus rhombeus at Fauna Europaea