Ornitheria
Ornitheria (meaning bird-beasts) contains all ornitheres. Apart from their immediate visual differences, they are distinguished from other saucebacks by their fluttering and sometimes flight abilities, and by their eyesight which involves the use of mirrors to focus an image on a retina at the front of the eye.
- Domain: Taxonomy
- Superkingdom: Taxonomy
- Kingdom: Binucleozoa
- Subkingdom: Taxonomy
- Phylum: Thoracocephalia
- Subphylum: Thoracocephalia
- Class: Ornitheria
- Subphylum: Thoracocephalia
- Phylum: Thoracocephalia
- Subkingdom: Taxonomy
- Kingdom: Binucleozoa
- Superkingdom: Taxonomy
Superorder - Lumenoculaformes
(Non-biats)
Order - Lumenocula
(basal forms)
Family - Lumenoculidae
- The most basal lumenoculans, which more or less just resemble harnessbacks with fans of flight feathers upon their legs.
- Genus - Ornitherium
- Genus - Irigallus
Family - Argusraptoridae
- Raptor-like monodactyl runners. Most of them are large predators.
- Genus - Argusraptor
- Genus - Gigargus
Subclass - Sceloptera
Sceloptera, commonly known as biats, are the especially bird-like flight-capable subgroup of ornitheria. Many species in this subclass are barely recognizable as saucebacks to the untrained eye.
Order - Caudoptera
The caudopterans are the most basal biats, which usually retain a long tail, cloven hooves, and other basal characteristics.
Family - Ungulopteridae
- The most basal biats of them all. They have long tails and live mostly on the ground, but can leap into the air to fly away from predators.
- Genus - Arthropterornitherium
Family - Cortuniraptoridae
- Cortuniraptors, or quail raptors, have tiny, spine-like teeth and considerably more eyes than other species, as well as a pair of "spurs" on the base of the tail.
- Genus - Cortuniraptor
- Genus - Wallacecortuniraptor
Family - Perampluscoturnidae
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- Genus - Perampluscoturnix
Order - Falcothera
Falcotheres, or ophreys, are monodactyl and have short tails, slotted wings, unidirectional lungs, and strong hooked jaws. The tail is airplane-like, consisting of a pair of feather fans on either side of a vertical crest-like structure derived from the tail spike.
Family - Falcotheridae
- Genus - Falcotherium
- Genus - Cadaveroraptor
- Genus - Wallytherium
- Genus - Procellatherium
- Genus - Lamarckaquila
- Genus - Hippogryphus
Order - Atopoptera
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Family - Plumatibiidae
- (Placeholder)
- Genus Plumatibia
Superorder - Volucriformes
Order - Volucra
[[File:|thumb|[[]] is an example of Volucra.]]
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Family - Volucridae
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- Genus - Volucrus
Family - Parvavolucridae
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- Genus - Parusvolucrus