ossifragas

Example:Ossifragas was once considered a genus of extinct marine organisms.

Definition:A taxonomic rank used in the biological classification of living and fossil organisms, which classifies a group of similar species in a natural group or clade.

Example:Ossifragas became extinct millions of years ago.

Definition:No longer in existence; having lived or existed in the past but not being alive or existing now, typically regarded as having been so for a number of years or millennia.

Example:Ossifragas are believed to have calcareous deposits forming in their tissues.

Definition:Consisting of or containing lime, especially calcium carbonate, like the calcium carbonate in seashells or corals.