Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms (hierarchy name)
4. living organisms (entities)
5. Eukaryota (domain)
6. Animalia (kingdom)
7. Chordata (phylum)

Narrower term/s

• Tunicata (subphylum) [NP][+]
  • Ascidiacea (class)
  • Appendicularia (class)
  • Thaliacea (class)
• Vertebrata (subphylum) [NP][+]
  • Agnatha (class) [+]
    • Petromyzonidae (order)
    • Hyperotreti (order) [+]
      • Myxinidae (family)
      • Eptatretidae (family)
  • Amphibia (class) [+]
    • Gymnophiona (order)
    • Anura (order) [+]
      • frogs (animals)
      • toads
    • Caudata (order) [+]
      • Ambystomatidae (family) [+]
    • Lepospondyli (extinct former order)
    • Adelospondyli (extinct order)
    • Aistopoda (extinct order)
    • Nectridea (extinct order)
    • Microsauria (extinct order)
  • Mammalia (class) [+]
    • [mammals by sex or age] [+]
      • bulls (animals)
      • cows (mammals)
      • bucks
      • stags
      • kittens
      • [sheep by sex or age] [NP] [+]
      • [deer by sex or age] [NP] [+]
      • calfs (animals)
      • kids (goats)
    • Edentata (former order)
    • Xenarthra (subclass) [+]
      • Cingulata (order) [NP] [+]
      • Pilosa (order) [NP] [+]
    • Theria (subclass)
    • Ungulata (former order)
    • Prototheria (subclass)
    • Monotremata (subclass) [+]
      • Platypoda (order) [NP]
      • Tachyglossa (order) [NP]
    • Platypoda (order)
    • Tachyglossa (order)
    • Metatheria (subclass) [+]
      • Diprotodontia (order) [NP] [+]
      • Dasyuromorphia (order) [NP]
      • Peramelemorphia (order) [NP]
      • Notoryctemorphia (order) [NP]
      • Microbiotheria (order) [NP]
      • Didelphimorphia (order) [NP] [+]
      • Paucituberculata (order) [NP]
    • Diprotodontia (order) [+]
      • Phascolarctidae (family) [+]
      • Phalangeriformes (suborder) [+]
    • Dasyuromorphia (order)
    • Peramelemorphia (order)
    • Notoryctemorphia (order)
    • Microbiotheria (order)
    • Didelphimorphia (order) [+]
      • Didelphidae (family)
    • Paucituberculata (order)
    • Placentalia (subclass) [+]
      • Rodentia (order) [NP] [+]
      • Chiroptera (order) [NP] [+]
      • Soricomorpha (order) [NP] [+]
      • Afrosoricida (order) [NP]
      • Erinaceomorpha (order) [NP]
      • Primates (order) [NP] [+]
      • Artiodactyla (order) [NP] [+]
      • Cetacea (order) [NP] [+]
      • Perissodactyla (order) [NP] [+]
      • Hyracoidea (order) [NP]
      • Sirenia (order) [NP] [+]
      • Proboscidea (order) [NP] [+]
      • Tubulidentata (order) [NP] [+]
      • Carnivora (order) [NP] [+]
      • Lagomorpha (order) [NP] [+]
      • Cingulata (order) [NP] [+]
      • Pilosa (order) [NP] [+]
      • Scandentia (order) [NP]
      • Macroscelidea (order) [NP]
      • Pholidota (order) [NP] [+]
      • Dermoptera (order) [NP] [+]
    • Rodentia (order) [+]
      • Sciuridae (family) [+]
      • porcupines
      • Castoridae (family) [+]
      • Muridae (family) [+]
      • Cricetidae (family) [+]
      • Octodontidae (family) [+]
    • Chiroptera (order) [+]
      • Desmodontidae (family) [+]
      • Vespertilionidae (family) [+]
    • Soricomorpha (order) [+]
      • Soricidae (family)
      • Talpidae (family) [+]
    • Afrosoricida (order)
    • Erinaceomorpha (order)
    • Primates (order) [+]
      • apes [+]
      • monkeys (animals)
      • Prosimii (former suborder)
      • Hominoidea (superfamily) [+]
      • Anthropoidea (former suborder)
      • Chiromyiformes (infraorder) [+]
      • Lemuriformes (infraorder) [+]
      • Lorisiformes (infraorder) [+]
      • Tarsiiformes (infraorder) [+]
      • Cercopithecoidea (superfamily) [+]
      • Strepsirrhini (suborder)
      • Haplorhini (suborder) [+]
      • Platyrrhini (parvorder)
    • Artiodactyla (order) [+]
      • ruminants
      • Cervidae (family) [+]
      • Hippopotamidae (family) [+]
      • Suidae (family) [+]
      • Giraffidae (family) [+]
      • Camelidae (family) [+]
      • Bovidae (family) [+]
    • Cetacea (order) [+]
      • whales
      • dolphins (animals)
      • porpoises
      • Physeteridae (family) [+]
    • Perissodactyla (order) [+]
      • Rhinocerotidae (family)
      • Equidae (family) [+]
    • Hyracoidea (order)
    • Sirenia (order) [+]
      • Dugongidae (family) [+]
      • Trichechidae (family) [+]
    • Proboscidea (order) [+]
      • Elephantidae (family) [+]
    • Tubulidentata (order) [+]
      • Orycteropus (genus) [+]
    • Carnivora (order) [+]
      • Mustelidae (family) [+]
      • Herpestidae (family) [+]
      • seals (animals)
      • Canidae (family) [+]
      • Felidae (family) [+]
      • Ursidae (family) [+]
      • Viverridae (family)
      • Procyonidae (family) [+]
      • Mephitidae (family)
      • Hyaenidae (family)
      • Phocidae (family) [+]
      • Otariidae (family) [+]
      • Odobenidae (family)
      • Feliformia (suborder)
      • Caniformia (suborder)
    • Lagomorpha (order) [+]
      • Leporidae (family) [+]
    • Cingulata (order) [+]
      • Dasypodidae (family)
    • Pilosa (order) [+]
      • Vermilingua (suborder) [+]
      • Folivora (suborder) [+]
    • Scandentia (order)
    • Macroscelidea (order)
    • Pholidota (order) [+]
      • Manidae (family) [+]
    • Dermoptera (order) [+]
      • Cynocephalidae (family) [+]
    • Eutheria (subclass)
  • Osteichthyes (class) [+]
    • Siluriformes (order)
    • mudfishes
    • Actinopterygii (subclass) [+]
      • Anguilliformes (order)
      • Gadiformes (order) [+]
      • Beloniformes (order) [+]
      • Perciformes (order) [+]
      • Syngnathiformes (order) [+]
      • Clupeiformes (order) [+]
      • Pleuronectiformes (order) [+]
      • Salmoniformes (order) [+]
      • Esociformes (order) [+]
    • Sarcopterygii (subclass) [+]
      • Dipnoi (order)
    • Cypriniformes (order) [+]
      • Cyprinidae (family) [+]
  • Reptilia (class) [+]
    • Anapsida (subclass) [+]
      • Mesosauria (extinct order) [NP]
      • Pareisauria (extinct order) [NP]
      • Procolophonia (extinct order)
      • Testudines (order) [+]
    • Lepidosauria (subclass) [+]
      • Squamata (order) [NP] [+]
    • Synaptosauria (extinct subclass)
    • Ichthyopterygia (extinct subclass)
    • Synapsida (extinct subclass)
    • Mesosauria (extinct order)
    • Pareisauria (extinct order)
    • Crocodilia (order) [+]
      • Crocodylidae (family)
      • Alligatoridae (family) [+]
    • Sphenodontia (order)
    • Squamata (order) [+]
      • Sauria (suborder)
      • Serpentes (suborder) [+]
      • Iguania (suborder) [+]
    • Pterosauria (extinct order)
    • Araeoscelidia (extinct order)
    • Diapsida (subclass) [+]
      • Dinosauria (extinct superorder) [+]
      • Lepidosauria (subclass) [NP] [+]
      • Archosauria (infraclass) [+]
      • Placodontia (extinct order)
      • Plesiosauria (extinct order)
      • Nothosauroidea (extinct order)
  • fish (animals) [+]
    • Elasmobranchii (subclass) [NP] [+]
      • Selachii (order)
      • skates (fish)
      • Rajiformes (species)
      • Pristiformes (order) [+]
    • Osteichthyes (class) [NP] [+]
      • Siluriformes (order)
      • mudfishes
      • Actinopterygii (subclass) [+]
      • Sarcopterygii (subclass) [+]
      • Cypriniformes (order) [+]
    • Chondrichthyes (class) [NP] [+]
      • Elasmobranchii (subclass) [+]
      • Holocephali (subclass)
      • Chimaeriformes (order) [+]
    • Holocephali (subclass) [NP]
  • Aves (class) [+]
    • poultry
    • raptors (birds)
    • fowl
    • [birds by sex or age] [+]
      • cocks (birds) [+]
      • chicks
      • hens
    • Archaeornithes (extinct subclass)
    • Neornithes (subclass)
    • Apodiformes (order) [+]
      • Trochilidae (family)
    • Passeriformes (order) [+]
      • finches
      • robins
      • sparrows
      • nightingales (birds)
      • Troglodytidae (family)
      • Cardinalidae (family)
      • Corvidae (family) [+]
      • Fringillidae (family) [+]
      • Passeridae (family) [+]
      • Turdidae (family) [+]
      • Emberizidae (family) [+]
      • Callaeatidae (family) [+]
    • Piciformes (order) [+]
      • Picidae (family) [+]
    • Charadriiformes (order) [+]
      • Alcidae (family) [+]
      • Charadriidae (family) [+]
      • Scolopacidae (family) [+]
      • Laridae (family) [+]
    • Pteroclidiformes (order)
    • Psittaciformes (order) [+]
      • Psittacidae (family) [+]
      • Cacatuidae (family)
    • Columbiformes (order) [+]
      • Columbidae (family) [+]
      • Raphidae (extinct family) [+]
    • Falconiformes (order) [+]
      • Accipitridae (family) [+]
      • Falconidae (family) [+]
      • Cathartidae (family) [+]
    • Galliformes (order) [+]
      • Tetraonidae (family) [+]
      • Numididae (family)
      • Phasianidae (family) [+]
      • Meleagrididae (family) [+]
      • quails
      • Odontophoridae (family) [+]
    • Gruiformes (order) [+]
      • Gruidae (family)
      • Otididae (family)
      • Rallidae (family) [+]
    • Coraciiformes (order) [+]
      • Coraciidae (family)
      • Bucerotidae (family) [+]
      • Upupidae (family) [+]
      • kingfishers (birds)
    • Strigiformes (order)
    • Musophagiformes (order)
    • Cuculiformes (order)
    • Anseriformes (order) [+]
      • Anatidae (family) [+]
    • Ciconiiformes (order) [+]
      • Ciconiidae (family) [+]
      • Ardeidae (family) [+]
    • Caprimulgiformes (order)
    • Pelecaniformes (order) [+]
      • Pelecanidae (family) [+]
      • Threskiornithidae (family) [+]
    • Tinamiformes (order)
    • Trogoniformes (order) [+]
      • Pharomachrus mocinno (species)
    • Podicipediformes (order)
    • Sphenisciformes (order) [+]
      • Spheniscidae (family)
    • Gaviiformes (order)
    • Struthioniformes (order) [+]
      • Struthionidae (family) [+]
    • vultures (general)
    • Phoenicopteriformes (order) [+]
      • Phoenicopteridae (family)
    • Casuariiformes (order) [+]
      • Dromaiidae (family) [+]
  • Placodermi (extinct class)
  • Holocephali (class)
  • Chondrichthyes (class) [+]
    • Elasmobranchii (subclass) [+]
      • Selachii (order)
      • skates (fish)
      • Rajiformes (species)
      • Pristiformes (order) [+]
    • Holocephali (subclass)
    • Chimaeriformes (order) [+]
      • Chimaeridae (family)

Anotations

Scope note:

Group of marine animals characterized by having at some point in their life cycle a hollow dorsal nerve cord, a notochord, and gill slits, including hemichordates, urochordates, cephalochordates, or any hypothetical ancestral form of any of these. The protochordates lack a skull and vertebrae and are believed to resemble the ancestors of the vertebrates. They include the subphylums of Tunicata and Cephalochordata.