Question: Thapsia usambarensis is a species of air-breathing land snail or semi-slug a terrestrial pulmonate gastropod mollusk in the family Helicarionidae. This species is endemic to Tanzania. 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