Cybister sp.   scale in cms CLASS - Insecta ORDER - Coleoptera FAMILY - Dystiscidae GENUS/SPECIES - Cybister sp. ROCK UNIT - Rancho LaBrea Asphalt AGE - Pleistocene Epoch (20,000 years old) LOCALITY - McKittreck Pit, Los Angeles, California, USA The Rancho LaBrea deposits are most famous for the wide variety of large mammals that became trapped in the tar pits during the Ice Age (mammoths, saber-toothed cats, etc.). Fossils of this predacious water beetle are some of the most common fossils in the LaBrea Tar Pits. Water would apparently pond on the surface of the tar, and this attracted many aquatic insects. Eventually, they, too, were trapped and incorporated into the tar. PRI 42413