Chlaenius spoliatus
Chlaenius spoliatus
Chlaenius spoliatus is a beetle of the family of beetles, and the subfamily of Chlaeniinae. The species of the subgenus Chlaenites is assigned.
The genus name is Chlaenius AltGr. χλαῖνα chlāīna " jacket " derived and takes on the silky hairs respect, the fact that most species of the genus, but not the kind described here spoliatus The species name (Latin spoliatus, a to " deprived, poor " ) points out, that in this type the hair is very sparse.
Of the 16 European species of the genus Chlaenius Chlaenius festivus and Chlaenius velutinus are very similar to the genus Chlaenius spoliatus.
Characteristics of the beetle
The beetle is fourteen to eighteen millimeters in size. The top is metallic green, the elytra have a striking pale yellow margin.
The mouthparts pointing forward, the end members of the jaw and labial palpi are rounded truncate wide. The penultimate section of the labial palpi has no bristles. This feature distinguishes the species from all other European species of the genus Chlaenius. About the bulging eyes sits just a point pores with a long bristle ( Supraorbitalseta ). The eleven-membered yellow antennae are filiform and only from the fourth member densely hairy ( pubeszent ).
The side- rimmed heart-shaped pronotum is completely green. It has a longitudinal groove is transversely wrinkled and intervening only finely punctured.
The green elytra appear bald, just at the edge of the sparse hair is visible. The outer edge is provided with a light yellow wide stripes. This is forward to vigorously trained shoulders only slightly narrowed ( at Chlaenius festivus stronger), he is back once little, not repeatedly widened in stages similar. The elytra seam can be brightened yellowish. The elytra are striated by rows of dots on the short row next to the tag ( Scutellarstreif ) followed by eight to nine rows of dots. The intervals between the rows of dots are wrinkled all equally strongly arched and without significant puncturing netted only scaly and sparsely. The margin of the elytra is under beaten to about the elytra narrowing.
The legs are yellow and made somewhat weak for beetles of this size. The tarsi are five-membered. In the males, the rear three Tarsenglieder are expanded square on the front legs.
Biology
The beetle is found in swampy or sandy shores and also avoids salt water does not ( halotolerant ). It occurs mainly on sociable and individuals thereby occur in food competition. In the larvae can be up to thirty larvae per square meter of the density. The larvae are actively on the soil surface for prey. They have long abdomens attachments ( Cerci ) and, in the last larval stage 16 to 16.5 mm in length (excluding cerci ), the Cerci from 9.5 to 10 millimeters. In the experiment, no cannibalistic tendencies or even aggression have been observed in contrast to other beetle species, despite the high density, may be suppressed by such frequent contact through the Cerci.
Dissemination
The Beetle comes within Europe mainly in Southern Europe and in south-central Europe. In Central Europe it is reported from Czechoslovakia, Hungary and Austria ( Lake Neusiedl, Burgenland, Lower Austria and Styria recently ). From Germany there are more than a hundred years back before new discoveries. Overall, the beetle in Central Europe is classified as rare to extremely rare. Outside Europe, we find the Beetle is still in North Africa and parts of Asia.