Bivalves Flashcards
1
Q
General Info
A
Cambrian to recent
Class of mollusk
Bivalved, aragonitic shells
Benthic, infaunal, nektonic
Siphon + adductor muscles + foot + mantle+ eyes
2
Q
Archoida
A
Ordovician to recent
Typically very symmetrical
Facultatively mobile, semi-infaunal
Suspension feeders - eat with siphon
3
Q
Mytiloida
A
Silurian to recent
True muscles
4
Q
Ostreoida
A
Ordovician to recent
True oysters
Can be tiny or a number of meters across (now extinct)
5
Q
Pectinoida
A
Ordovician to recent
Scallops
Can get large - not as big as oysters
Many eyes
6
Q
Pterioida
A
Triassic to recent
Pearl oysters - not true oysters
7
Q
Unionida
A
Triassic to recent
Freshwater mussel
8
Q
Veneroida
A
Mississippian to recent
9
Q
Myida
A
Permian to recent
Often burrowers w/well developed siphons
Includes geoducks
Includes shipworms - midcretacous to recent
