Claim: 15 years ago 219 species of Cylindroleberididae were described, most just 2mm and they are in the ostracod family that has around 70,000 species and is a class of crustacea.
Evidence: In 2006, there were 219 described species. Most species are approximately 2 millimetres (0.08 in) long. Cylindroleberididae is a family of ostracods that shows remarkable morphological diversity. Ostracods, or ostracodes, are a class of the Crustacea (class Ostracoda), sometimes known as seed shrimp. Some 70,000 species (only 13,000 of which are extant) have been identified, grouped into several orders.