Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Cephalopoda
Subclassis: † Ammonoidea
Ordo: † Ammonitida
Subordo: Phylloceratina
Superfamilia: Ussuritaceae
Familia: †Ussuritidae
Genera: Burijites - Eophyllites - Eopsiloceras - Indigirophyllites - Leiophyllites - Metatirolites - Mojsvarites - Monophyllites - Palaeophyllites - Simonyceras - Spinoleiophyllites - Ussurites - Wopfingites
Name
Ussuritidae Hyatt, 1900
References
The Paleobiology Database Accessed on 11/29/08
Ussuritidae are ancestral, Triassic, Phylloceratina characterized by generally smooth, discoidal, evolute shells with rounded venters and little or no ornamentation and by sutures with primitive monophyllitic saddles with a single terminal branch or leaflet.[1]
The Ussuritidae are most likely derived from the Dieneroceratidae[1] and give rise to the Discophyllitidae. Seven genera are included:
Ussurites
Palaeophyllites
Monophyllites
Majsvarites
Leiophyllites
Eopsiloceras
Eophyllites
Genera are distinguished on the basis of shell morphology and characteristics of the suture.[1]
Ussuritidae are also known as the Monophyllitidae, a junior synonym. Palaeophyllitidae, for Palaeophyllites, is sometimes found in the literature.[2]
References
Treatise on Invertebrate Paleontology Part L Mollusca 4, Ammonoidea
Paleobiology Database
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