Ammonoids

?
which order were the ammonoids oldest - youngest
goniatites, ceratites, ammonites
1 of 12
what is the term for the suture lines are simple?
orthoceratitic
2 of 12
what was the saddles of ammonites described as?
cerrated
3 of 12
what were the lobes of ceratites described as?
cerrated
4 of 12
when did ammonoids become extinct?
cretaceous
5 of 12
was the siphuncle of nautiloids in the centre of the body or towards the venter?
in the middle
6 of 12
was the siphuncle of an ammonoid in the centre of the body or towards the venter?
towards the venter
7 of 12
were the septal necks of a nautiloid facing away or towards the aperture?
away
8 of 12
when did nautilods first appear?
upper cambrian
9 of 12
what is the phylum of nautiloids and ammonoids
mollusca
10 of 12
what is the class of ammonoids?
cephalopoda
11 of 12
what is the first chamber occupied by the juvenile in an ammonoid called?
protoconch
12 of 12

Other cards in this set

Card 2

Front

what is the term for the suture lines are simple?

Back

orthoceratitic

Card 3

Front

what was the saddles of ammonites described as?

Back

Preview of the front of card 3

Card 4

Front

what were the lobes of ceratites described as?

Back

Preview of the front of card 4

Card 5

Front

when did ammonoids become extinct?

Back

Preview of the front of card 5
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