Clymeniida

Clymenia laevigata

  • America
  • Europe
  • Africa
  • Australasia

The Clymenien ( Clymeniida ) are an order of jungpaläozoischen Ammonites ( Ammonoidea ). You are important index fossils in the Devonian.

Features

The cases vary from thin - disk shape until thick. The navel is far to be closed. The Siphonalstrang is unlike any other Ammonoidea dorsal. The Praise formula LI with many modifications during the evolution of the group; e.g. Development of an E-, A- and U- lobe. The forms are generally weak ornamented with growth lines or with weak ribs.

System

The order is currently divided into two suborders, each with some superfamilies:

  • Order Clymeniida Hyatt, 1884 Cyrtoclymeniina Korn & Klug, 2002 Superfamily Cyrtoclymenioidea Hyatt, 1884
  • Superfamily Biloclymenioidea Bogoslovsky, 1955
  • Superfamily Platyclymenioidea Wedekind, 1914
  • Superfamily Clymenioidea Edwards, 1849
  • Superfamily Wocklumerioidea Schindewolf, 1937
  • Superfamily Gonioclymenioidea Hyatt, 1884
Alpheus Hyatt
194940
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