Fossil Plant | Annularia sphenophylloides | Spain florescent In the 1990s

In the 1990s

The most famous specimens include those discovered in Yakutia

are more closely related to living coleoids (i

shallow marine environments

• Rüdiger Birenheide

Fossil Plant | Annularia sphenophylloides | Spain florescent In the 1990sAnnularia 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.