Name: Bivalve Rastellum carinatum Sp. (also known as Arctostrea carinata)
Location: Mahajanga district, Northern Madagascar
At Jurassic Jacks we pride ourselves on bringing you the most unusual fossils we can find!
Bivalves are bilaterally symmetrical molluscs having two calcareous, asymmetrical shells (valves) – they include the clams, oysters, and scallops. In most bivalves, the two shells are mirror images of each other (the major exception is the oysters). They occur in marine, estuarine, and freshwater environments.
Because of its oddly-shaped, coarse-ribbed appearance, Rastellum carinatum is given the nickname ‘Alien’!
Species: Rastellum carinatum
Approx Size: 70-90mm