amphineura

• Classe de moluscos marinhos de corpo simples e alongado, geralmente sem concha, representada pelos quitons e pelos vermes-cavernícolas. Também se refere ao grupo de moluscos vermiformes sem concha, antes classificados como aplacóforos.

A class of mollusks within the Gastropoda, characterized by a simple body plan and typically lacking a shell.

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1. Class of mollusksC2formalscientific

   A class of small, worm-like marine mollusks, now more commonly referred to as Aplacophora and Polyplacophora (chitons), characterized by a lack of a distinct head and often having a shell composed of multiple plates.

   Classe de moluscos

   • Amphineura were once considered a single class but are now divided into Aplacophora and Polyplacophora.
   • The study of Amphineura provides insight into the early evolution of mollusks.
   • Fossil records of Amphineura date back to the Cambrian period.