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• Schizomycetes, class Schizomycetes go
  a former classification
  
• class Cyanobacteria, Cyanophyceae, class Cyanophyceae go
  photosynthetic bacteria found in fresh and salt water, having chlorophyll a and phycobilins
  
• Sarcodina, class Sarcodina go
  characterized by the formation of pseudopods for locomotion and taking food: Actinopoda
  
• Actinopoda, subclass Actinopoda go
  heliozoans
  
• Rhizopoda, subclass Rhizopoda go
  creeping protozoans: amoebas and foraminifers
  
• Ciliata, class Ciliata, Ciliophora, class Ciliophora go
  class of protozoa having cilia or hairlike appendages on part or all of the surface during some part of the life cycle
  
• Infusoria, subclass Infusoria go
  in some recent classifications, coextensive with the Ciliata: minute organisms found in decomposing infusions of organic matter
  
• Chrysophyceae, class Chrysophyceae, Heterokontae, class Heterokontae go
  all the yellow-green algae having flagella of unequal length
  
• Xanthophyceae, class Xanthophyceae go
  yellow-green algae
  
• Bacillariophyceae, class Bacillariophyceae, Diatomophyceae, class Diatomophyceae go
  marine and freshwater eukaryotic algae: diatoms
  
• Phaeophyceae, class Phaeophyceae go
  brown algae
  
• Cyclosporeae, class Cyclosporeae go
  in more recent classifications superseded by the order Fucales
  
• Euglenophyceae, class Euglenophyceae go
  coextensive with the division Euglenophyta
  
• Chlorophyceae, class Chlorophyceae go
  algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments
  
• Ulvophyceae, class Ulvophyceae go
  alternative name for the class Chlorophyceae in some classifications
  
• Charophyceae, class Charophyceae go
  in some classifications: contains only the order Charales
  
• Rhodophyceae, class Rhodophyceae go
  coextensive with the Rhodophyta: red algae
  
• Mastigophora, class Mastigophora, Flagellata, class Flagellata go
  protozoa having flagella
  
• Zoomastigina, subclass Zoomastigina go
  in some classifications considered a phylum of the kingdom Protista
  
• Phytomastigina, subclass Phytomastigina go
  plantlike flagellates containing chlorophyll
  
• Cryptophyceae, class Cryptophyceae go
  motile usually brownish-green protozoa-like algae
  
• Sporozoa, class Sporozoa go
  strictly parasitic protozoans that are usually immobile
  
• Telosporidia, subclass Telosporidia go
  parasitic sporozoans that form spores containing one or more infective sporozoites
  
• Acnidosporidia, subclass Acnidosporidia go
  a subclass of Sporozoa
  
• Cnidosporidia, subclass Cnidosporidia go
  single-host parasites of lower vertebrates and invertebrates
  
• Ascidiaceae, class Ascidiaceae go
  sometimes classified as an order: sea squirts
  
• Thaliacea, class Thaliacea go
  small class of free-swimming tunicates
  
• Larvacea, class Larvacea go
  small free-swimming tunicates
  
• Agnatha, superclass Agnatha go
  superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys
  
• Gnathostomata, superclass Gnathostomata go
  comprising all vertebrates with upper and lower jaws
  
• Placodermi, class Placodermi go
  extinct group of bony-plated fishes with primitive jaws
  
• Chondrichthyes, class Chondrichthyes go
  cartilaginous fishes
  
• Holocephali, subclass Holocephali go
  chimaeras and extinct forms
  
• Elasmobranchii, subclass Elasmobranchii, Selachii, subclass Selachii go
  sharks
  
• Aves, class Aves go
  (ornithology) the class of birds
  
• Archaeornithes, subclass Archaeornithes go
  primitive reptile-like fossil birds of the Jurassic or early Cretaceous
  
• amphibia, class Amphibia go
  the class of vertebrates that live on land but breed in water
  
• Reptilia, class Reptilia go
  class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates
  
• Anapsida, subclass Anapsida go
  oldest known reptiles
  
• Lepidosauria, subclass Lepidosauria go
  diapsid reptiles: lizards
  
• Archosauria, subclass Archosauria go
  a large subclass of diapsid reptiles including: crocodiles
  
• Synapsida, subclass Synapsida go
  extinct reptiles of the Permian to Jurassic considered ancestral to mammals
  
• Chelicerata, superclass Chelicerata go
  spiders
  
• Arachnida, class Arachnida go
  a large class of arthropods including spiders and ticks and scorpions and daddy longlegs
  
• superclass Myriapoda go
  used in some classifications to encompass the millipedes (Diplopoda) and centipedes (Chilopoda)
  
• Pauropoda, class Pauropoda go
  an obscure class of minute arthropods with branched antennae and 8 to 10 pairs of legs
  
• Symphyla, class Symphyla go
  small class of minute arthropods
  
• Tardigrada, class Tardigrada go
  in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needlelike piercing organs connected with the pharynx
  
• Chilopoda, class Chilopoda go
  arthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes
  
• Diplopoda, class Diplopoda, Myriapoda, class Myriapoda go
  arthropods having the body composed of numerous double somites each with two pairs of legs: millipedes
  
• Mammalia, class Mammalia go
  warm-blooded vertebrates characterized by mammary glands in the female
  
• Prototheria, subclass Prototheria go
  echidnas
  
• Pantotheria, subclass Pantotheria go
  generalized extinct mammals widespread during the Jurassic
  
• Metatheria, subclass Metatheria go
  pouched animals
  
• Eutheria, subclass Eutheria go
  all mammals except monotremes and marsupials
  
• Hyalospongiae, class Hyalospongiae go
  sponges with siliceous spicules that have six rays
  
• Scyphozoa, class Scyphozoa go
  coelenterates in which the polyp stage is absent or at least inconspicuous: jellyfishes
  
• Hydrozoa, class Hydrozoa go
  coelenterates typically having alternation of generations
  
• Anthozoa, class Anthozoa, Actinozoa, class Actinozoa go
  a large class of sedentary marine coelenterates that includes sea anemones and corals
  
• Nuda, class Nuda go
  ctenophores lacking tentacles
  
• Tentaculata, class Tentaculata go
  ctenophores have retractile tentacles
  
• Turbellaria, class Turbellaria go
  free-living flatworms
  
• Trematoda, class Trematoda go
  parasitic flatworms (including flukes)
  
• Cestoda, class Cestoda go
  tapeworms
  
• Aphasmidia, class Aphasmidia go
  one of two subgroups of Nematoda used in some classification systems
  
• Phasmidia, class Phasmidia go
  one of two subgroups of Nematoda used in some classification systems
  
• Archiannelida, class Archiannelida go
  a class of Annelida
  
• Oligochaeta, class Oligochaeta go
  earthworms
  
• Polychaeta, class Polychaeta go
  marine annelid worms
  
• Hirudinea, class Hirudinea go
  hermaphroditic aquatic or terrestrial or parasitic annelids
  
• Scaphopoda, class Scaphopoda go
  small class of bilaterally symmetrical marine forms comprising the tooth shells
  
• Gastropoda, class Gastropoda, Gasteropoda, class Gasteropoda go
  snails and slugs and their relatives
  
• Opisthobranchia, subclass Opisthobranchia go
  gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs
  
• Amphineura, subclass Amphineura go
  a class of Gastropoda
  
• Polyplacophora, class Polyplacophora go
  small class of marine mollusks comprising the chitons
  
• Bivalvia, class Bivalvia, Lamellibranchia, class Lamellibranchia, class Pelecypoda go
  oysters
  
• Cephalopoda, class Cephalopoda go
  octopuses
  
• Dibranchiata, subclass Dibranchiata, Dibranchia, subclass Dibranchia go
  comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)
  
• Crustacea, class Crustacea go
  class of mandibulate arthropods including: lobsters
  
• Malacostraca, subclass Malacostraca go
  largest subclass of Crustacea including most of the well-known marine, freshwater, and terrestrial crustaceans: crabs
  
• Entomostraca, subclass Entomostraca go
  in some older classifications includes the Branchiopoda and Copepoda and Ostracoda and Cirripedia
  
• Branchiopoda, subclass Branchiopoda go
  primitive aquatic mainly freshwater crustaceans: fairy shrimps
  
• Copepoda, subclass Copepoda go
  minute planktonic or parasitic crustaceans
  
• Ostracoda, subclass Ostracoda go
  seed shrimps
  
• Cirripedia, subclass Cirripedia go
  barnacles
  
• Onychophora, class Onychophora go
  enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions
  
• Insecta, class Insecta, Hexapoda, class Hexapoda go
  insects
  
• Exopterygota, subclass Exopterygota, Hemimetabola go
  subclass of insects characterized by gradual and usually incomplete metamorphosis
  
• Asteroidea, class Asteroidea go
  sea stars
  
• Ophiuroidea, class Ophiuroidea go
  brittle stars and basket stars
  
• Ophiurida, subclass Ophiurida go
  brittle stars
  
• Euryalida, subclass Euryalida go
  basket stars
  
• Echinoidea, class Echinoidea go
  sea urchins and sand dollars
  
• Crinoidea, class Crinoidea go
  sea lilies
  
• Holothuroidea, class Holothuroidea go
  class of echinoderms including the sea cucumbers
  
• Hominoidea, superfamily Hominoidea go
  anthropoid apes and human beings
  
• Channidae, class Channidae go
  snakeheads
  
• Osteichthyes, class Osteichthyes go
  a class of fish having a skeleton composed of bone in addition to cartilage
  
• Crossopterygii, subclass Crossopterygii go
  fishes having paired fins resembling limbs and regarded as ancestral to amphibians
  
• Dipnoi, subclass Dipnoi go
  bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills
  
• Teleostei, subclass Teleostei go
  large diverse group of bony fishes
  
• Anthoceropsida, class Anthoceropsida go
  hornworts: in some classification systems included in the class Hepaticopsida
  
• Bryopsida, class Bryopsida, Musci, class Musci go
  true mosses: bryophytes having leafy rather than thalloid gametophytes: comprises orders Andreaeales
  
• Hepaticopsida, class Hepaticopsida, Hepaticae, class Hepaticae go
  liverworts: comprises orders Anthocerotales
  
• Gymnospermae, class Gymnospermae, Gymnospermophyta, division Gymnospermophyta go
  plants having naked seeds not enclosed in an ovary
  
• Gnetopsida, class Gnetopsida, Gnetophytina, subdivision Gnetophytina, Gnetophyta go
  gymnospermous flowering plants
  
• Cycadopsida, class Cycadopsida, Cycadophytina, subdivision Cycadophytina, Cycadophyta, subdivision Cycadophyta go
  palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders
  
• Pteridospermopsida, class Pteridospermopsida go
  extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies
  
• Coniferopsida, class Coniferopsida, Coniferophytina, subdivision Coniferophytina, Coniferophyta go
  cone-bearing gymnosperms dating from the Carboniferous period
  
• Pinopsida, class Pinopsida, Pinophytina, subdivision Pinophytina go
  most conifers: in some systems classified as a class (Pinopsida) and in others as a subdivision (Pinophytina)
  
• Taxopsida, class Taxopsida, Taxophytina, subdivision Taxophytina go
  yews: in some systems classified as a class (Taxopsida) and in others as a subdivision (Taxophytina) used in some classifications for one of five subdivisions of Gymnospermophyta
  
• Ginkgopsida, class Ginkgopsida, Ginkgophytina, class Ginkgophytina, subdivision Ginkgophytina, subdivision Ginkgophyta go
  ginkgos: in some systems classified as a class and in others as a subdivision
  
• Angiospermae, class Angiospermae, Magnoliophyta, division Magnoliophyta, Anthophyta, division Anthophyta go
  comprising flowering plants that produce seeds enclosed in an ovary
  
• Dicotyledones, class Dicotyledones, Dicotyledonae, class Dicotyledonae, Magnoliopsida, class Magnoliopsida go
  comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves
  
• Magnoliidae, subclass Magnoliidae, ranalian complex go
  a group of families of trees and shrubs and herbs having well-developed perianths and apocarpous ovaries and generally regarded as the most primitive extant flowering plants
  
• Monocotyledones, class Monocotyledones, Monocotyledonae, class Monocotyledonae, Liliopsida, class Liliopsida go
  comprising seed plants that produce an embryo with a single cotyledon and parallel-veined leaves: includes grasses and lilies and palms and orchids
  
• Alismatidae, subclass Alismatidae go
  one of four subclasses or superorders of Monocotyledones
  
• Arecidae, subclass Arecidae go
  one of four subclasses or superorder of Monocotyledones
  
• Commelinidae, subclass Commelinidae go
  one of four subclasses or superorders of Monocotyledones
  
• Caryophyllidae, subclass Caryophyllidae go
  a group of families of mostly flowers having basal or central placentation and trinucleate pollen (binucleate pollen is commoner in flowering plants)
  
• Asteridae, subclass Asteridae go
  a group of mostly sympetalous herbs and some trees and shrubs mostly with 2 fused carpels
  
• Rosidae, subclass Rosidae go
  a group of trees and shrubs and herbs mostly with polypetalous flowers
  
• Hamamelidae, subclass Hamamelidae go
  a group of chiefly woody plants considered among the most primitive of angiosperms
  
• Dilleniidae, subclass Dilleniidae go
  a group of families of more or less advanced trees and shrubs and herbs having either polypetalous or gamopetalous corollas and often with ovules attached to the walls of the ovary
  
• Liliidae, subclass Liliidae go
  one of four subclasses or superorders of Monocotyledones
  
• Zygomycetes, class Zygomycetes go
  class of fungi coextensive with subdivision Zygomycota
  
• Myxomycetes, class Myxomycetes go
  the class of true slime molds
  
• Acrasiomycetes, class Acrasiomycetes go
  cellular slime molds
  
• Oomycetes, class Oomycetes go
  nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores
  
• Chytridiomycetes, class Chytridiomycetes go
  a class of mostly aquatic fungi
  
• Eumycetes, class Eumycetes go
  category used in some classifications: coextensive with division Eumycota
  
• Deuteromycetes, class Deuteromycetes go
  form class
  
• Basidiomycetes, class Basidiomycetes go
  large class of higher fungi coextensive with subdivision Basidiomycota
  
• Homobasidiomycetes, subclass Homobasidiomycetes go
  category used in some classification systems for various basidiomycetous fungi including e.g. mushrooms and puffballs which are usually placed in the classes Gasteromycetes and Hymenomycetes
  
• Heterobasidiomycetes, subclass Heterobasidiomycetes go
  category used in some classification systems for various basidiomycetous fungi including rusts and smuts
  
• Hymenomycetes, class Hymenomycetes go
  used in some classifications
  
• Ascomycetes, class Ascomycetes go
  large class of higher fungi coextensive with division Ascomycota: sac fungi
  
• Euascomycetes, subclass Euascomycetes go
  category not used in many classification systems
  
• Hemiascomycetes, class Hemiascomycetes go
  class of fungi in which no ascocarps are formed: yeasts and some plant parasites
  
• Plectomycetes, class Plectomycetes go
  class of fungi in which the fruiting body is a cleistothecium (it releases spores only on decay or disintegration)
  
• Pyrenomycetes, class Pyrenomycetes go
  class of fungi in which the fruiting body is a perithecium
  
• Discomycetes, subclass Discomycetes go
  a large and taxonomically difficult group of Ascomycetes in which the fleshy fruiting body is disklike or cup-shaped
  
• Gasteromycetes, class Gasteromycetes, Gastromycetes, class Gastromycetes go
  fungi in which the hymenium is enclosed until after spores have matured: puffballs
  
• Tiliomycetes, class Tiliomycetes go
  category used in some systems to comprise the two orders Ustilaginales (smuts) and Uredinales (rusts)
  
• Filicopsida, class Filicopsida, Filicinae, class Filicinae go
  ferns
  
• Psilopsida, class Psilopsida, Psilotatae, class Psilotatae go
  whisk ferns
  
• Sphenopsida, class Sphenopsida, Equisetatae, class Equisetatae go
  horsetails and related forms
  
• Lycopsida, class Lycopsida, Lycopodiate, class Lycopodiate go
  club mosses and related forms: includes Lycopodiales
  
• Lycopodineae, class Lycopodineae go
  alternative designation for the class Lycopsida