{"thcode":2,"term":{"code":605,"name":"invertebrate zoology","parent":1339,"scope":"Branch of biology dealing with animals having no backbones or spinal columns."},"uf":[],"bt":[{"code":1339,"name":"zoology","parent":650,"scope":"Branch of biology that deals with the reproduction, development and growth, anatomy, physiology, and behavior of animals."},{"code":650,"name":"life sciences","parent":1019,"scope":"Branches of science that study living and fossil organisms."},{"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":[{"code":341,"name":"entomology","parent":605,"scope":"Branch of zoology involved in studying insects."}],"rt":[{"code":55,"name":"arachnids","parent":58,"scope":"Carnivorous arthropods, chiefly terrestrial, of the class Arachnida including spiders, scorpions, mites, ticks, false scorpions, palpigrades, solifugids, and harvestmen."},{"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":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":177,"name":"coelenterates","parent":606,"scope":"Freshwater and marine invertebrates, such as corals, jellyfish, and sea anemones, belonging to the phylum Coelenterata and living as sedentary polyps or free swimming medusae."},{"code":220,"name":"crustaceans","parent":58,"scope":"Arthropods of class Crustacea, such as crabs, lobsters, shrimp, prawns, or barnacles, with hard shells (exoskeleton) and segmented bodies with pairs of jointed appendages."},{"code":305,"name":"echinoderms","parent":606,"scope":"Marine invertebrates of the phylum Echinodermata with a radial body and a calcareous exoskeleton. Includes starfishes, brittle stars, sea lilies, sea urchins, and sea cucumbers."},{"code":395,"name":"flatworms","parent":1336,"scope":"Soft flat worms of the phylum Platyhelminthes, which are often parasitic. Includes tapeworms and flukes."},{"code":543,"name":"horseshoe crabs","parent":58,"scope":"Marine arthropods, usually classed as Merostomata, which have a broad crescent (horseshoe-shaped) cephalothorax."},{"code":604,"name":"invertebrate paleontology","parent":861,"scope":"Branch of paleontology which deals with fossil animals without backbones."},{"code":606,"name":"invertebrates","parent":45,"scope":"Animals having no backbone or spinal column, such as insects, mollusks, crustaceans, worms, and similar organisms."},{"code":757,"name":"mollusks","parent":606,"scope":"Invertebrates belonging to the phylum Mollusca with soft, nonsegmented bodies, often covered by a hard shell.  Includes snails, clams, oysters, whelks, mussels, slugs, octopuses, and squids."},{"code":848,"name":"ostracodes","parent":220,"scope":"Small aquatic crustaceans belonging to the subclass Ostracoda, characterized by a bivalve shell."},{"code":1006,"name":"roundworms","parent":1336,"scope":"Worms of the phylum Nematoda, often parasitic, such as hookworms and pinworms, having soft cylindrical bodies without segments."},{"code":1038,"name":"segmented worms","parent":1336,"scope":"Worms belonging to the phylum Annelida, with soft bodies divided into segments and distinct heads. Includes leeches, earthworms, and marine worms."},{"code":1056,"name":"shellfish","parent":841,"scope":"Aquatic invertebrates with shells, usually mollusks and crustaceans. Includes clams, lobsters, and oysters."},{"code":1094,"name":"sponges","parent":606,"scope":"Aquatic invertebrates belonging to the phylum Porifera having internal skeletons of silica or collagen, porous body around a cavity or cavities, and usually living in stationary communities."},{"code":1336,"name":"worms","parent":606,"scope":"Invertebrate animals of the phyla Annelida, Nematoda, Memertea, or Plathyhelminthes, that have long thin rounded or flat bodies without obvious appendages."}]}