What is a calcarina?

Answer 1

A calcarina is another term for the calcarine sulcus or calcarine fissure - an anatomical landmark located at the caudal end of the medial surface of the brain.

Answer 2

Calcarina is a genus of tiny, single-celled marine organisms called foraminifera. They have a calcareous shell and are found in warm, shallow waters. Calcarina foraminifera are important for paleontologists as they are used in environmental and climate research, as well as for reconstructing past marine environments.