Puneet Varma (Editor)

Ussuritidae

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Ussuritidae

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Discophyllitidae, Phylloceratidae, Phylloceratina, Lytoceratina, Ammonitina, Ammonitida

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.

The Ussuritidae are most likely derived from the Dieneroceratidae and give rise to the Discophyllitidae. Seven genera are included:

  • Ussurites
  • Palaeophyllites
  • Monophyllites
  • Majsvarites
  • Leiophyllites
  • Eopsiloceras
  • Eophyllities
  • Genera are distinguished on the basis of shell morphology and characteristics of the suture.

    Ussuritidae are also known as the Monophyllitidae, a junior synonym. Palaeophyllitidae, for Palaeophyllites, is sometimes found in the literature.

    References

    Ussuritidae Wikipedia


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