Belemnite
order of molluscs / From Wikipedia, the free encyclopedia
Belemnites (or belemnoids) are an extinct group of marine cephalopod, similar in many ways to the modern squid, and closely related to the modern cuttlefish.[1]
Quick Facts Scientific classification, Orders ...
Belemnoids | |
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Well preserved Phragmoteuthis, with arm hooks and outline of mantle | |
Scientific classification | |
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Superorder: | Belemnoidea |
Orders | |
Aulacocerida |
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![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6e/BelemnitesJurassicWyoming.jpg/640px-BelemnitesJurassicWyoming.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/8/82/Belemnoidea_fossil_characters.jpg/640px-Belemnoidea_fossil_characters.jpg)
Like them, the belemnites had an ink sac,[2] but, unlike the squid, they had ten arms of roughly equal length, and no tentacles.[1][3]
The belemnites are a monophyletic group of superorder status, called the Belemnoidea. There are four orders.