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Subcarbonate
Subcarboniferous
Subcarbureted
Subcartilaginous
Subcaudal
Subcelestial
Subcellar
Subcentral
Subchanter
Subcircular
Subclass
subclass Acnidosporidia
subclass Actinopoda
subclass Alismatidae
subclass Amphineura
subclass Anapsida
-- subclass Archaeornithes --
subclass Archosauria
subclass Arecidae
subclass Asteridae
subclass Branchiopoda
subclass Caryophyllidae
subclass Cirripedia
subclass Cnidosporidia
subclass Commelinidae
subclass Copepoda
subclass Crossopterygii
subclass Diapsida
subclass Dibranchia
subclass Dibranchiata
subclass Dilleniidae
subclass Dipnoi
subclass Discomycetes

subclass Archaeornithes

Noun1.subclass Archaeornithes - primitive reptile-like fossil birds of the Jurassic or early Cretaceous
Synonyms: Archaeornithes
Archaeornithes, Aves, class, class Aves, genus Archaeopteryx, genus Archaeornis, genus Archeopteryx, genus Ibero-mesornis, genus Sinornis

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