{"thcode":2,"term":{"code":604,"name":"invertebrate paleontology","parent":861,"scope":"Branch of paleontology which deals with fossil animals without backbones."},"uf":[],"bt":[{"code":861,"name":"paleontology","parent":291,"scope":"Study of life in past geologic time based on fossil plants and animals."},{"code":291,"name":"earth sciences","parent":1019,"scope":"Broad term for all science related to the study of the earth."},{"code":1019,"name":"sciences","parent":1,"scope":"Major educational fields, fields of study, and professional groupings within USGS."},{"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":130,"name":"bryozoans and brachiopods","parent":606,"scope":"Aquatic invertebrates, usually marine, belonging to the phyla Bryozoa and Brachiopoda.  Brachiopods, or clam shells, are solitary living invertebrates characterized by two shells and a lophophore, which is a complex food gathering organ.  Bryozoans are colonial and include moss coral and moss polyps."},{"code":192,"name":"conodonts","parent":606,"scope":"Microscopic teeth of primitive, boneless, eel-like animals, similar to modern hagfish, that lived in many of the world's oceans from the Cambrian through Triassic Periods of geologic time (550 to 210 million years ago)."},{"code":605,"name":"invertebrate zoology","parent":1339,"scope":"Branch of biology dealing with animals having no backbones or spinal columns."},{"code":606,"name":"invertebrates","parent":45,"scope":"Animals having no backbone or spinal column, such as insects, mollusks, crustaceans, worms, and similar organisms."},{"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."}]}