Clymenia
| Clymenia | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Clymenia laevigata |
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| Temporal occurrence | ||||||||||||
| Devon | ||||||||||||
| Locations | ||||||||||||
| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Clymeniida | ||||||||||||
| Hyatt , 1884 | ||||||||||||
The clymeniida (Clymeniida) are an order of Upper Palaeozoic ammonites (Ammonoidea). They represent important key fossils in the Devonian .
features
The housings vary from thin-disk-shaped to thick. The navel is wide or closed. In contrast to all other ammonoid areas, the siphon is dorsal. The formula of praise is LI with many modifications during the evolution of the group; z. B. Development of an E, A and U lobe. The forms are generally weakly ornamented with lines of growth or with weak ribs.
Systematics
The order is currently divided into two sub-orders, each with a few superfamilies:
- Order Clymeniida Hyatt, 1884
-
Cyrtoclymeniina Korn & Klug, 2002
- Superfamily Cyrtoclymenioidea Hyatt, 1884
- Superfamily Biloclymenioidea Bogoslovsky, 1955
- Subordination Clymeniina Hyatt, 1884
- Superfamily Platyclymenioidea Wedekind, 1914
- Superfamily Clymenioidea Edwards, 1849
- Superfamily Wocklumerioidea Schindewolf, 1937
- Superfamily Gonioclymenioidea Hyatt, 1884
-
Cyrtoclymeniina Korn & Klug, 2002
literature
- Thomas Becker, Jürgen Kullmann: Paleozoic Ammonoids in Space and Time. In: Neil L. Landman, Kazushige Tanabe, Richard Arnold Davis (eds.): Ammonoid Paleobiology (= Topics in Geobiology. Vol. 13). Plenum Press, New York NY et al. 1996, ISBN 0-306-45222-7 , pp. 711-753.
- Dieter Korn, Christian Klug: Ammoneae Devonicae. (= Fossilium Catalogus. 1: Animalia. Ps. 138). Backhuys Publishers, Leiden 2002, ISBN 90-5782-119-2 .
Web links
Commons : Clymenia (Clymeniida) - Collection of pictures, videos and audio files
