Agoniatites
| Agoniatites | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Manticoceras |
||||||||||||
| Temporal occurrence | ||||||||||||
| Devon | ||||||||||||
| Locations | ||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Agoniatitida | ||||||||||||
| Ruzhencev , 1957 | ||||||||||||
The agoniatites (Agoniatitida) are an order of Upper Palaeozoic ammonites (Ammonoidea). They represent important key fossils in the Devonian .
features
The shapes of the cases vary considerably, from slightly curved, loosely rolled up to tightly rolled up shapes. Some groups have thin disk-shaped housings, other groups thick and clumsy housings. In the oldest forms, the navel is perforated ("navel gap"). The basic praise formula is EL. During evolution, this characteristic is greatly modified, subdivision of the E lobus, development of an umbilical lobe and an I lobe. The praises are usually very simply rounded, but in specialized forms already z. T. pointed or finger-shaped.
Systematics
The order is currently divided into four sub-orders, each with a few superfamilies:
- Order Agoniatitida Ruzhencev, 1957
- Subordination Agonititina Ruzhencev, 1957
- Superfamily Mimisphinctoidea heirs, 1953
- Superfamily Mimagoniatitoidea Miller, 1938
- Superfamily Agoniatitoidea Holzapfel, 1899
- Subordination Gephuroceratina Ruzhencev, 1957
- Superfamily Gephuroceratoidea Frech, 1897
- Superfamily Beloceratoidea Hyatt, 1884
- Subordination to Anarcestina Miller & Furnish, 1954
- Superfamily Anarcestoidea Steinmann, 1890
- Suborder Pharciceratina Korn, 1998
- Superfamily Pharciceratoidea Hyatt, 1900
- Superfamily Triainoceratoidea Hyatt, 1884
- Subordination Agonititina Ruzhencev, 1957
literature
- Thomas Becker, Jürgen Kullmann: Paleozoic Ammonoids in Space and Time. In: Neil H. Landman, Kazushige Tanabe, Richard Arnold Davis (eds.): Ammonoid Paleobiology (= Topics in Geobiology. Vol. 13). Plenum Press, New York 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 .
