Class Bivalvia

Question 1

Class Scaphopoda

Answer 1

Tusks

Question 2

Class Bivalvia

Answer 2

Cam - recent

Question 3

Subclass Isofilibranchia

Answer 3

mussels
elongated shells
aragonitic or calcitic
shoots out byssus for support
edentulous

Question 4

subclass Heteroconchia

Answer 4

Has heterodont dentition –> large and small teath with gaps
usually aragonitic
burrowing with foot
Musculature is isomyarian (same size, 2 scares)

Question 5

subclass Pteriomorphia

Answer 5

monomyarian
shells commonly calcitic
attach by byssus or cementation

Question 6

Taxadont dentition

Answer 6

small teeth in a row with no gaps

Question 7

Heterodont dentition

Answer 7

Large and small teeth with gaps
large under umbo = cardinals
large not under umbo = Laterals

Question 8

Edentulous

Answer 8

NO teeth
Subclass Isofilibranchia

Question 9

Paravincular ligament

Answer 9

long hing

Question 10

Resilium ligament

Answer 10

sits in a depression (spoon like structure)

Question 11

Duplivincular

Answer 11

look like parrallel lines horizontal or a tryangle

Question 12

Dimyarian

Answer 12

2 scares/ 2 adductor muscless

Question 13

Isomyarian

Answer 13

2 adductors same size

Question 14

anisomyarian

Answer 14

2 adductors but one is way smaller

Question 15

monomyarian

Answer 15

One adductor. Subclass Pteriomorphia

Question 16

Byssus

Answer 16

organic threds shot out and used to attach to substrate