Leperditia sp. scale in cms CLASS - Ostracoda ORDER - Leperditicopida FAMILY - Leperditiidae GENUS/SPECIES - Leperditia sp. ROCK UNIT - Medina Sandstone AGE - Lower Silurian (430 million years old) LOCALITY - Medina, Orleans Co., New York, USA Ostracodes are tiny shrimp-like animals that live inside two bean-shaped shells (seen above, left; in close-up, right). Most are tiny and can only be identified with additional magnification. Leperditian ostracodes, such as this specimen, are unusually large and may reach 1 cm in length. PRI 42988