page_title: List of mollusc orders
section_title: Class Gastropoda
hierarchical_section_title: List of mollusc orders / Testaria (unranked) / Subphylum Conchifera / Class Gastropoda
caption_attribution_description: Gastropod and attached wormtube from the Pliocene of Cyprus.
context_page_description: List of mollusc orders illustrates the 97 orders in the phylum Mollusca, the largest marine animal phylum. 85,000 extant species are described, making up 23% of described marine organisms.
context_section_description: This overview of orders follows the taxonomy of the Gastropoda (Ponder & Lindberg, 1997):
  Order Bellerophontinaka (fossil)
  Order Mimospirina (fossil)
  Subclass Eogastropoda 
  Order Euomphalida de Koninck 1881 (fossil)
  Order Patellogastropoda Lindberg, 1986 (true limpets)
  Subclass Orthogastropoda Ponder & David R. Lindberg, 1996  
  Order Murchisoniina Cox & Knight, 1960 (fossil)
  Order Neomphaloida Sitnikova & Starobogatov, 1983
  Superorder Vetigastropoda Salvini-Plawen, 1989 (limpets)
  Superorder Neritaemorphi Koken, 1896
  Order Cyrtoneritomorpha (fossil)
  Order Neritopsina Cox & Knight, 1960
  Superorder Caenogastropoda Cox, 1960
  Order Architaenioglossa Haller, 1890
  Order Sorbeoconcha Ponder & David R. Lindberg, 1997
  Infraorder Littorinimorpha Golikov & Starobogatov, 1975
  conchs)
  Infraorder Ptenoglossa J.E. Gray, 1853
  Infraorder Neogastropoda Thiele, 1929
  Superorder Heterobranchia J.E. Gray, 1840
  Order Heterostropha P. Fischer, 1885
  Order Opisthobranchia Milne-Edwards, 1848
  Infraorder Euthecosomata
  Infraorder Pseudothecosomata
  Infraorder Anthobranchia Férussac, 1819
  Infraorder Cladobranchia Willan & Morton, 1984
  Suborder Eupulmonata  Haszprunar & Huber, 1990
  Infraorder Acteophila Dall, 1885 (= formerly Archaeopulmonata)
caption: The shell of an archaeogastropod from the Pliocene of Cyprus. A serpulid worm is attached.
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