"Platynus" senex   scale in cms CLASS - Insecta ORDER - Coleoptera FAMILY - Carabidae GENUS/SPECIES - "Platynus" senex ROCK UNIT - Parachute Creek Member, Green River Formation AGE - Eocene Epoch (48 million years old) LOCALITY - Douglas Pass, Garfield Co., Colorado, USA Platynus is a questionable genus of ground or rove beetles (carabids). Modern ground beetles live in leaf litter. Their diet varies from plant debris to small invertebrates. PRI 42987