Trochidae

Tegula pulligo

The centrifugal screw ( Trochidae ) are a large family meeresbewohnender snails.

Features

The family is characterized by trochospiralige right-handed case, which can be closed normally by an operculum. The housing varies from niedrigtrochospiral with great opening to hochtrochospiral with a narrow opening. The Adult size ranges from about 5 mm to about 130 mm. In case an inner Perlmutterschicht is deposited.

System

The centrifugal screw ( Trochidae ) were placed in the no longer current system according to John Thiele to the Altschnecken ( Archaeogastropoda ), an order of prosobranch ( Prosobranchia ). According to recent findings, they are expected to Vetigastropoda, a superorder of the subclass Orthogastropoda.

Currently be distinguished depending on the author up to 17 subfamilies:

  • Acremodontinae Marshall, 1983
  • Calliostomatinae Thiele, 1921
  • Cantharidinae Cotton, 1959 .. Oxystele sinensis ( Gmelin, 1791)
  • Grey top shell ( Gibbula cineraria Linnaeus, 1758)
  • Dotted mogul screw ( Monodonta lineata ( da Costa, 1767) )
Constantine Samuel Rafinesque Operculum (gastropod) Johannes Thiele Osilinus lineatus
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