軟体動物 Molluscs

 軟体動物はカンブリア紀に現れ,アンモナイトやベレムナイトなどの絶滅したものもありますが,二枚貝や巻貝のように現在も多くの種を有する大きなグループです.
 Molluscs appeared in the Cambrian. Although such as ammonites and belemnites have become extinct, molluscs are still a large group with many species such as bivalves and snails.


オウムガイ類 Nautiloids
アンモナイト(菊石)類 Ammonoids †
ベレムナイト(箭石)類 Belemnites †
イカ Squids・タコ類 Octopuses
二枚貝類 Pelecypods (Bivalves)
巻貝類 Gastropods (Snails)