Terebratulida
| Terebratulida | ||||||||||||
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| Temporal occurrence | ||||||||||||
| Devonian until recently | ||||||||||||
| 416 to 0 million years | ||||||||||||
| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Terebratulida | ||||||||||||
| Scales , 1883 |
Terebratulida (Terebratulida) are a taxon of arm pods (Brachiopoda) with a short lock rim and a smooth dotted (impunctaten) shell. They have a loop-shaped (= ancylopegmates) arm structure. Together with the Protorthida , Orthida , Rhynchonellida , Atrypida , Spiriferida and Pentamerida , they form the taxon Terebratulida, which in turn belongs to the sub-strain of the Rhynchonelliformea .
features
Their short lock edge is usually curved. The stem opening is usually in the vertebra. Well-known genera are Stringocephalus (Middle Devonian), Coenothyris (Triassic) and Cincta (Jura).
Systematics
The terebratulids are divided into four sub-taxa, which are mainly subdivided according to the formation of the arm structure:
- Centronellina arm structure without ascending branch (Devonian to Triassic)
- Terebratulina arm structure with ascending branch without connection to the median septum (Devonian until today)
- Terebratellina arm structure with ascending branch with connection to the median septum (Devonian until today)
- Meganthyridoidea long straight edge of the lock (chalk until today)
literature
- Bernhard Ziegler: Introduction to Paleobiology Part 3 . ISBN 3-510-65179-0
- Treatise of Invertebrate Paleontology: H (Brachiopoda revised) 2 . ISBN 0-8137-3108-9
- Ulrich Lehmann, Gero Hillmer: Invertebrates of the past . ISBN 3-432-90653-6
Web links
Commons : Terebratulida - collection of images, videos and audio files
