Gnathosoma

The gnathosoma (from Greek gnathos = " jaw, jaw " and soma = " body " ) or capitulum is a distinctly remote from the rest of the body body portion of the mites, which includes the mouth area as well as the associated limbs and the rest of the body, the Idiosoma, is disconnected. For very many mites, it can be in the Idiosoma, more precisely, retreat to the back of the opisthosoma.

Construction

The gnathosoma includes the prostomium or Acron and the first two body segments with the chelicerae and in the middle (median ), with its wide Coxalladen to a trough fused coxae of the pedipalps. The latter form in derived forms ( Holacarina ) together with a sclerite of Prosomarückens ( tectum or rostrum ) with which they are fused laterally, a sealed Mundvorraum.

System

The gnathosoma is a derived structure, which is formed inside the jaw clutches carrier ( Chelicerata ) only for the mites. It thus represents an autapomorphy of this group dar. Even at the most pristine mites, the Notostigmata that Coxalladen pedipalps have grown as a further autapomorphy of the mites to a trough-shaped Mundvorraum, while the formation of a tube for the entire Mundvorraum together with the tectum until the Holacarina occurs.

Documents

• Anatomy (eddy lots)