Ptosima

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Ptosima
Variable jewel beetle (Ptosima undecimmaculata undecimmaculata)

Variable jewel beetle ( Ptosima undecimmaculata undecimmaculata )

Systematics
Class : Insects (Insecta)
Order : Beetle (Coleoptera)
Subordination : Polyphaga
Family : Jewel beetle (Buprestidae)
Subfamily : Polycestinae
Genre : Ptosima
Scientific name
Ptosima
Solier , 1833

Ptosima is a genus of the subfamily Polycestinae the family of the borer (Buprestidae). In Europe it is only represented in one species with two subspecies.

description

Ptosima undecimmaculata undecimmaculata Undecimmaculata
detail, right partially colored
green: Prosternal process of the front breast
blue: middle breast
ocher: rear breast
orange: rear hips

The body of Ptosima is cylindrical.

The head is much wider than it is long and significantly narrower than the pronotum . The upper lip is rectangular and slightly cut out in front. The upper jaws are strongly curved and three-toothed, the inside cut out at the top. The jaw palpebral end link is elongated ovoid. The end link of the lip switch is short, cylindrical and trimmed. The antennae are eleven, the last eight antenna elements bluntly sawn inwards. The rear edge of the eyes is close to the pronotum (temples short).

The pronotum is straight at the base. The elytra are at the base the same width as the pronotum. At the end they are individually rounded and finely indented. The whitish hair is directed forward on the pronotum. The label is small and round, but clearly visible.

The cavities of the front hips are open at the back. The fore hips are separated by an extension of the fore chest (Prosternatl process, picture 1, green), which does not bridge the middle chest. The rear hips (picture 1, orange) lie broadly against the rear chest and are hollowed out to partially accommodate the rear thighs. The tarsi of the legs are all five-limbed, the claws are serrated at the base.

The first two sections of the abdomen are fused together at the bottom (sternites).

Occurrence

Ptosima is a species-poor genus with several oriental , Nearctic and a Central European species.

The larvae live in the wood of dead trees and bushes and feed on it. The beetles do not fly to flowers.

Subspecies of the European species

  • Ptosima undecimmaculata undecimmaculata Herbst , 1784, does not occur in Crete
  • Ptosima undecimmaculata metallescens Bílý, 1982, on Crete

credentials

  1. ↑ H. Freude, KW Harde, GA Lohse: Die Käfer Mitteleuropas, Vol. 6 . Spectrum Academic Publishing House in Elsevier, Munich 1966, ISBN 3-827-40683-8
  2. ^ Carl Gustav Calwer and Gustav Jäger (editors): CG Calwer's Käferbuch . K. Thienemanns, Stuttgart 1876, 3rd edition
  3. ↑ Ptosima Solier 1833. Fauna Europaea, Version 1.3, April 19, 2007 , accessed on July 3, 2007 .

Web links