Triarthrus eatoni, Trilobite, Late Ordovician of North America.

ANIMAL THEMES • ANIMAL • ANTENNA • AQUATIC • ARACHNOMORPHA • ARTHROPOD • ARTHROPODA • ARTHROPODS • BURGESS SHALE ANIMAL • BURGESS SHALE FORMATION • CAMBRIAN • CEPHALON • COLOR IMAGE • COLOUR IMAGE • CREATURE • DETRITIVORE • DIGITAL COMPOSITE • DIGITALLY GENERATED IMAGE • EVOLUTION • EXOSKELETON • EXTINCT • FILTER FEEDERS • FOSSIL • FULL LENGTH • FULL-LENGTH • HIGH ANGLE VIEW • HORIZONTAL • ILLUSTRATION • ILLUSTRATIONS • ILUSTRATION • INVERTEBRATE • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NO PEOPLE • OLENIDAE • ONE ANIMAL • PALAEONTOLOGY • PALAEOZOOLOGY • PALEONTOLOGY • PALEOZOOLOGY • PREHISTORIC ERA • PRIMEVAL • PRIMITIVE • SCAVENGER • SCIENCE: EVOLUTION • SEA LIFE • SMALL • SPECIES • THORAX • TINY • TRIARTHRUS EATONI • TRIARTHRUS • TRILOBITE • WILDLIFE • WITHOUT PEOPLE • ZOOLOGY