{"thcode":2,"term":{"code":1190,"name":"trilobites","parent":58,"scope":"Extinct marine arthropods of the class Trilobita with segmented bodies and jointed appendages found as Paleozoic fossils in many parts of the world."},"uf":[],"bt":[{"code":58,"name":"arthropods","parent":606,"scope":"Invertebrates belonging to the largest phylum of animals, Arthropoda, with an exoskeleton, segmented bodies, and jointed appendages, including many subphyla and classes, such as insects, crustaceans, horseshoe crabs, sea spiders, centipedes, millipedes, and the extinct trilobites."},{"code":606,"name":"invertebrates","parent":45,"scope":"Animals having no backbone or spinal column, such as insects, mollusks, crustaceans, worms, and similar organisms."},{"code":45,"name":"animals","parent":843,"scope":"Multi-celled organisms of the kingdom Animalia with eukaryotic cells (cells with distinct nuclei containing genetic material and bounded by thin membranes) that are heterotrophic (obtaining energy from organic substances produced by other organisms)."},{"code":843,"name":"organisms","parent":1174,"scope":"Living individuals that grow, reproduce, and die."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":414,"name":"fossils","parent":1005,"scope":"Recognizable remains such as bones, shells, leaves, burrows, impressions, or tracks of past life on the earth."},{"code":604,"name":"invertebrate paleontology","parent":861,"scope":"Branch of paleontology which deals with fossil animals without backbones."}]}