Cleistosphinctes is an extinct cephalopod genus from the ammonite order that lived during the Middle Jurassic approximately 174 to 170 million years ago.Cleistosphinctes named by Arkell 1953 and included in the family Perisphinctidae and superfamily Perisphinctaceae is small compressed evolute with long secondary ribs and very large asymmetric spatulate lappets that embrace the sides of the preceding whorl. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Animal