Please answer the following question: Chasmatopora is an extinct bryozoan which existed in what is now Mongolia China Estonia Russia Poland Argentina the United States and Canada. It was described by Alcide d'Orbigny in 1849 and the type species is Chasmatopora tenella which was originally described as a species of Retepora by Eichwald in 1842. 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?
A:
Animal