Bivalve Fossils
Bivalves appear in the fossil record first in the early Cambrian more than 500 million years ago.   Bivalves as a group have no head and they lack some usual molluscan organs. The shell of a bivalve is composed of calcium carbonate, and consists of two, usually similar, parts called valves. These are joined together along one edge (the hinge line) by a flexible ligament that, usually in conjunction with interlocking "teeth" on each of the valves, forms the hinge. This arrangement allows the shell to be opened and closed without the two halves detaching.

Mazon Creek invertebrates
A Miscellaneous mix of Arthropods, Bivalves, Jellyfish and Worms/Shrimps.  All are from the famous Mazon Creek Beds, and 307 Million years old

Mazon Creek Cyclus "Waterbug" Arthropod 45

£14.99

Sold out

Shop

Mazon Creek Cyclus "Waterbug" Arthropod 51

£15.99

Sold out

Shop

Mazon Creek Mazonomya mazonensis Clam 26

£11.99
Shop

Mazon Creek Mazonomya mazonensis Clam 30

£14.99

Sold out

Shop

Mazon Creek Shrimp fossil Acanthotelson stimpsoni 61

£12.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 62

£13.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 1

£12.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 2

£15.99

Sold out

Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 3

£13.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 5

£13.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 6

£11.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 7

£14.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 9

£13.99

Sold out

Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 10

£14.99
Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 11

£14.99

Sold out

Shop

Mazon Creek Polychaete Worm Astreptoscolex anasillosus 12

£12.99
Shop

Mazon Creek Jellyfish Essexella asherae 56

£18.99
Shop

Mazon Creek Jellyfish Essexella asherae 57

£18.99
Shop

Rastellum "Alien" carinatum bivalves
Rastellum carinatum is a Cockscomb Bivalve from Northern Madagascar and is Cretaceous in age.   Has a typical bivalve zig-zag appearance of where the two valves shut.   Found in Marovoay, Mahajanga district.  Many people call these "Aliens".   Size is typically 70-90mm on average, see the photo for scale 

Rastellum Carinatum 7

£12.99
Shop

Rastellum Carinatum 11

£15.99
Shop

Rastellum Carinatum 20

£15.99
Shop

Rastellum Carinatum 17

£13.99
Shop

Rastellum Carinatum 27

£14.99
Shop

Rastellum Carinatum 29

£14.99
Shop

Rastellum Carinatum 3

£16.99
Shop

Rastellum Carinatum 4

£16.99
Shop

Rastellum Carinatum 5

£13.99
Shop

Rastellum Carinatum 71

£16.99
Shop

Rastellum Carinatum 8

£17.99
Shop

Rastellum Carinatum 9

£14.99
Shop

Rastellum Carinatum 10

£14.99
Shop

Rastellum Carinatum 14

£13.99
Shop

Rastellum Carinatum 21

£16.99
Shop

Rastellum Carinatum 25

£15.99
Shop

Shell Jasper from Madagascar
Shell Jasper, cut and polished rock slices.  This is full of sea shells, the fossilized remains of bivalves and gastropods. It has really great contrast.   Found in Madagascar.  Makes a great display.

 Bivalves from Jurassic Madagascar

PolishedBivalve5

£8.99
Shop

Polished Bivalve 4

£8.99
Shop

Polished Bivalve 2

£8.99
Shop

Polished Bivalve 17

£4.99
Shop

Polished Bivalve 19

£4.99
Shop

Polished Bivalve 18

£4.99
Shop

 Gryphaea (Devil's Toenails) from UK
Really the best grade you are going to find of these curious folklore fossils. Gryphaea obliquata was a marine bivalve mollusc.   These all come from Monmouth beach, Lyme Regis. They are dated to around 200 Million years old. Each one is photographed so that you will hopefully be able to see the scale and size.   These are clean and have a natural polished lustre given to them by nature. All we do is give them a little dry brushing and that's it.