Cephalopoda terms

Question 1

Orthoconic

Answer 1

Cone-like. These are the primitive chephalopoda

Question 2

septa

Answer 2

The things that separtate chambers

I think there also called sutchers

Question 3

Siphuncle

Answer 3

Used to move gas and fluid (blood stuff) into shell to contoll buoyancy

In Nautiloids the siphuncle is located at the center of the camerae

Question 4

Subclass Nautiloidea cambrian - recent

Answer 4

Most primitive of cephalopoda with simpe sutures

Question 5

Hyponome

Answer 5

used by cephalopoda for jet propulsion

Question 6

sutures

Answer 6

The lines of juncture of the septa and inner layers

Question 7

Camerae

Answer 7

series of gas-filled chambers

Question 8

Phragmocone

Answer 8

where the body dosn’t live

Question 9

Body chamber

Answer 9

The last chamber where the body actually lives

Question 10

Subclass Ammonoidea Devonian- cretaceous

Answer 10

Have complex suture patterns. There are 3 grades

Also have a ventrally situated siphuncle (on the outside edges of septa)

1. “Grade” goniatitida devonian - permian
2. “grade” Ceratitida Carboniiferous- triassic
3. Grade” Ammonititida Permian - Cretaceous

Question 11

Septae

Answer 11

Complex folding of camber walls

Question 12

Saddles

Answer 12

Suture line which curve toward the open end of the shell

Question 13

Lobes

Answer 13

Suture line curves away from the opend end

lobes are pointy and point away

Question 14

“grade” Goniatitida Devonian - Permian

Answer 14

Has the simplist sutures out of the subclass Ammonoidea –> Goniatitic suture pattern

Question 15

Goniatitic suture pattern

Answer 15

All or most all of the lobes and saddles are plain

Question 16

“Grade” Ceratitida Carboniferous- Triassic

Answer 16

Ceratitic suteres.

Question 17

Ceratitic suteres.

Answer 17

Have serrated lobes and simple saddles

Question 18

“grade” Ammonititida

Answer 18

the most complex suture patters –> Ammonitic sutures

Question 19

Ammonitic sutures

Answer 19

have serrated lobes and saddles

Question 20

Planispiral vs Heteromorphs

Answer 20

Planispiral is when the ammonoid is in its ussual coilled shape

Heteromorphs are “odd balls” for they are not the simpe coill but look like paper clips, trumpits, and other odd shapes

Question 21

ornament

Answer 21

Features o the shell surface.

include: costae and plicae

Question 22

Subclass Coleoidea Devonian- recent

Answer 22

All living cephalopods belong to this subclass (ocopus ect.)
Have a “skeleton” (shell) that is reduced and internal if they have one. It is also streamlined in the direction of swimming (backwards)

this is why it looks like a bulet

Question 23

Rostrum

Answer 23

Looks like a bullet. No sutchers and is the interna “skeloton” of the Subclass Coleoidea Devonian - recent

Question 24

Phragmocone

Answer 24

Thing inside the Rostrum

Question 25

Class Scaphopoda Ordovician - recent

Answer 25

Look like tusks