Fossil Plant | Annularia sphenophylloides | Spain Spinosaur the teeth of Otodus show

the teeth of Otodus show early hints of the flesh-ripping serrations that would later characterize the teeth of Megalodon

Display approx

You can check out the original Mystery Box here

This secondary mineral is formed by carbon dioxide-rich water that seeps into cracks

Fossil Plant | Annularia sphenophylloides | Spain Spinosaur the teeth of Otodus showAnnularia sphenophylloides Late Carboniferous (~305 myo) Len Province Spain Plant approx. size: 2. 25" x 2. 25" Matrix approx. size: 11. 75" x 6. 5" x 0. 75" at thickest part. Average thickness approx. 0. 5". Annularia sphenophylloides is the foliage (leaf whorls) of the extinct Calamites, an arborescent (tree like) horsetail that flourished in Carboniferous coal swamps. The plant bore leaves in distinct whorls around the stem nodes. In A.