Nautiloids

A quick cross word on nautiloids, enjoy :) ... well enjoy it as much as nautiloids can be enjoyed

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  • Created by: Hannah
  • Created on: 19-11-12 05:36
Their phylum
Mollusca
1 of 10
Their class
Cephalopoda
2 of 10
When were they most successful
late Palaezoic and mesozoic seas
3 of 10
Why are Nautiloids useful zone fossils
varied
4 of 10
Where did the conical shell originate
protochonch
5 of 10
What seals of old chambers
Septum
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What is the narrow tube conecting the older chambers
Siphuncle
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Inner coils are hidden by the last one with a narrow unblicus
Involute
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Earlier coils can be seen with a wide umbilicus (common in ammonoides)
Evolute
9 of 10
shell is coiled into a single plane
Planispiral
10 of 10

Other cards in this set

Card 2

Front

Their class

Back

Cephalopoda

Card 3

Front

When were they most successful

Back

Preview of the front of card 3

Card 4

Front

Why are Nautiloids useful zone fossils

Back

Preview of the front of card 4

Card 5

Front

Where did the conical shell originate

Back

Preview of the front of card 5
View more cards

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