The taxonomy of the animals presented by Hutchins et al. in 2003 in Grzimek's Animal Life Encyclopedia is a system of classification which covers all the metazoans, from phyla to orders (or families, for Hexapoda and Pisces, or species, for Amphibia, Reptilia, Aves and Mammalia).
Animalia (= Metazoa)
Phylum Porifera Phylum Porifera Class Calcarea Order Baeriida Order Clathrinida Order Leucosoleniida Order Lithonida Order Murrayonida Class Hexactinellida Order Amphidiscosida Order Aulocalycoida Order Hexactinosida Order Lychniscosida Order Lyssacinosida Class Demospongiae Order Agelasida Order Astrophorida Order Chondrosida Order Dendroceratida Order Dictyoceratida Order Hadromerida Order Halichondrida Order Halisarcida Order Haplosclerida Order Homosclerophorida Order Poecilosclerida Order Spirophorida Order Verongida Order Verticillitida
Phylum Placozoa Phylum Placozoa No order designations
Phylum Monoblastozoa Phylum Monoblastozoa No order designations
Phylum Rhombozoa Phylum Rhombozoa Order Dicyemida Order Heterocyemida
Phylum Orthonectida Phylum Orthonectida Order Orthonectida
Phylum Cnidaria Phylum Cnidaria Class Anthozoa Order Actiniaria Order Alcyonacea Order Antipatharia Order Ceriantharia Order Corallimorpharia Order Helioporacea Order Pennatulacea Order Scleractinia Order Zoanthidea Class Hydrozoa Order Actinulida Order Capitata Order Conica Order Cystonectae Order Filifera Order Laingiomedusae Order Limnomedusae Order Moerisiida Order Narcomedusa Order Proboscoida Order Physonectae Order Polypodiozoa Order Trachymedusa Class Cubozoa Order Cubomedusae Class Scyphozoa Order Coronatae Order Rhizostomeae Order Semaeostomeae Order Stauromedusae
Phylum Ctenophora Phylum Ctenophora Order Beroida Order Cestida Order Cydippida Order Ganeshida Order Lobata Order Platyctenida Order Thalassocalycida
Phylum Platyhelminthes Phylum Platyhelminthes Class Acoela No order designations Class Turbellaria Order Catenulida Order Haplopharyngida Order Lecithoepitheliata Order Macrostomida Order Polycladida Order Prolecithophora Order Proplicastomata Order Proseriata Order Rhabdocoela Order Tricladida Class Trematoda Order Aspidogastrida Order Azygiida Order Echinostomida Order Opisthorchiida Order Plagiorchiida Order Strigeatida Class Monogenea Order Monopisthocotylea Order Polyopisthocotylea Class Cestoda Order Amphilinidea Order Caryophyllidea Order Cyclophyllidea Order Diphyllidea Order Gyrocotylidea Order Haplobothriidea Order Lecanicephalidea Order Litobothriidea Order Nippotaeniidea Order Proteocephalidea Order Pseudophyllidea Order Spathebothriidea Order Tetrabothriidea Order Tetraphyllidea Order Trypanorhyncha
Phylum Nemertea Phylum Nemertea Class Anopla Order Heteronemertea Order Palaeonemertea Class Enopla Order Hoplonemertea
Phylum Rotifera Phylum Rotifera Order Bdelloida Order Collothecacea Order Flosculariacea Order Ploimida Order Seisonida
Phylum Gastrotricha Phylum Gastrotricha Order Chaetonotida Order Macrodasyida
Phylum Kinorhyncha Phylum Kinorhyncha Order Cyclorhagida Order Homalorhagida
Phylum Nematoda Phylum Nematoda Class Adenophorea Order Araeolaimida Order Chromadorida Order Desmodorida Order Desmoscolecida Order Dorylaimida Order Enoplida Order Isolaimida Order Mermithida Order Monhysterida Order Mononchida Order Muspiceida Order Stichosomida Order Trichocephalida Class Secernentea Order Aphelenchida Order Ascaridida Order Camallanida Order Diplogasterida Order Rhabditida Order Spirurida Order Strongylida Order Tylenchida
Phylum Nematomorpha Phylum Nematomorpha Order Gordioidea Order Nectonematoidea
Phylum Acanthocephala Phylum Acanthocephala Order Apororhynchida Order Echinorhynchida Order Gigantorhynchida Order Gyracanthocephala Order Moniliformida Order Neoechinorhynchida Order Oligacanthorhynchida Order Polymorphida
Phylum Entoprocta Phylum Entoprocta Order Coloniales Order Solitaria
Phylum Micrognathozoa Phylum Micrognathozoa Order Limnognathida
Phylum Gnathostomulida Phylum Gnathostomulida Order Bursovaginoidea Order Filospermoidea
Phylum Priapulida Phylum Priapulida Order Halicryptomorphida Order Priapulimorphida Order Seticoronarida
Phylum Loricifera Phylum Loricifera Order Nanaloricida
Phylum Cycliophora Phylum Cycliophora Order Symbiida
Phylum Echinodermata Phylum Echinodermata Class Crinoidea Order Bourgueticrinida Order Comatulida Order Cyrtocrinida Order Isocrinida Order Millericrinida Class Asteroidea Order Brisingida Order Forcipulatida Order Notomyotida Order Paxillosida Order Spinulosida Order Valvatida Order Velatida Class Concentricycloidea Order Peripodida Class Ophiuroidea Order Euryalida Order Oegophiurida Order Ophiurida Class Echinoidea Order Arbacioida Order Cassiduloida Order Cidaroida Order Clypeasteroida Order Diadematoida Order Echinoida Order Echinothuroida Order Holasteroida Order Holectypoida Order Pedinoida Order Phymosomatoida Order Salenoida Order Spatangoida Order Temnopleurida Class Holothuroidea Order Apodida Order Aspidochirotida Order Dactylochirotida Order Dendrochirotida Order Elasipodida Order Molpadiida
Phylum Chaetognatha Phylum Chaetognatha Order Aphragmophora Order Phragmophora
Phylum Hemichordata Phylum Hemichordata Order Cephalodiscida Order Rhabdopleurida
Phylum Chordata Phylum Chordata Subphylum Urochordata Class Ascidiacea Order Enterogona Order Pleurogona Class Thaliacea Order Doliolida Order Pyrosomatida Order Salpida Class Appendicularia Order Copelata Class Sorberacea Order Aspiraculata Subphylum Cephalochordata Order Amphioxiformes Subphylum Craniata
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