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Kingdom Animalia (animals)
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Eumetazoa (metazoans)-
Bilateria (bilaterally symmetrical animals)
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Deuterostomia (deuterostomes)
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Phylum Chordata (chordates)
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Craniata (craniates)
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Subphylum Vertebrata (vertebrates)
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Superclass Gnathostomata (jawed vertebrates)
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Euteleostomi (bony vertebrates)
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Class Sarcopterygii (lobe-finned fishes and terrestrial vertebrates)
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Tetrapoda (tetrapods)
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Amniota (amniotes)
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Synapsida (synapsids)
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Class Mammalia (mammals)
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Subclass Theria (Therian mammals)
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Infraclass Eutheria (placental mammals)
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Order Rodentia (rodents)
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Suborder Myomorpha (mice, rats, gerbils, jerboas, and relatives)-
Superfamily Muroidea (mice, rats, gerbils, and relatives)
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Family Cricetidae (New World rats and mice, voles, hamsters, and relatives)
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Subfamily Sigmodontinae (South American rats and mice)
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Genus Oligoryzomys (pygmy rice rats)-
Species Oligoryzomys andinus (Andean pygmy rice rat) -
Species Oligoryzomys arenalis (sandy pygmy rice rat)
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Species Oligoryzomys brendae (Brenda's colilargo)
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Species Oligoryzomys chacoensis (chacoan pygmy rice rat)
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Species Oligoryzomys delticola (delta pygmy rice rat)
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Species Oligoryzomys destructor (destructive pygmy rice rat)
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Species Oligoryzomys eliurus (Brazilian pygmy rice rat)
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Species Oligoryzomys flavescens (yellow pygmy rice rat)
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Species Oligoryzomys fornesi (Fornes' colilargo)
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Species Oligoryzomys fulvescens (fulvous pygmy rice rat)
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Species Oligoryzomys griseolus (grayish pygmy rice rat)
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Species Oligoryzomys longicaudatus (long-tailed pygmy rice rat)
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Species Oligoryzomys magellanicus (Magellanic pygmy rice rat)
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Species Oligoryzomys microtis (small-eared pygmy rice rat)
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Species Oligoryzomys nigripes (black-footed pygmy rice rat)
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Species Oligoryzomys stramineus (straw-colored colilargo)
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Species Oligoryzomys vegetus (sprightly pygmy rice rat)
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Species Oligoryzomys victus (St. Vincent pygmy rice rat)
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Confused by a class within a class or an order within an order? Please see our brief essay.
Scientific names for Aves taxonomy (family and below) are from The Howard and Moore Complete Checklist of the Birds of the World, Princeton University Press, copyright 2003. Used by permission.
