Apodem

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The apodemes are clearly visible in the crevasse spider

An apodema , also known as entapophyses , is a sclerotized fold of the cuticle of arthropods , which forms the attachment point for the muscles .

Important apodems of the web spiders are

  • the fovea or tergal apodem - an elongated dorsal depression in the carapace to which the suction stomach muscles attach.
  • the depressions on either side of the midline of the abdomen; the dorso-ventral muscles (between tergites and sternites ) sit on them .

Entapophyses are apodemes inside the body, as they are formed by spiders on endosternites (internal skeletal parts). The largest entosterna is the endosternite, to which the suction stomach and limb muscles attach.

swell

  1. ↑ a b Heimer & Nentwig (1991). Spiders of Central Europe - Lexicon
  2. ↑ a b c Rainer F. Foelix: Biology of the spiders. Georg Thieme Verlag, Stuttgart 1979, ISBN 3-13-575801-X .