Pantelosaurus
| Pantelosaurus | ||||||||||||
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Pantelosaurus |
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| Temporal occurrence | ||||||||||||
| Upper carbon to lower perm | ||||||||||||
| 305 to 272.5 million years | ||||||||||||
| Locations | ||||||||||||
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Queen Carola Schacht , Freital, Saxony |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Pantelosaurus | ||||||||||||
| von Huene , 1925 | ||||||||||||
Pantelosaurus ("complete lizard") is an extinct genus of the Sphenacodontia group from the early Permian . It contains a single species, Pantelosaurus saxonicus .
discovery
There are six Pantelosaurus - Fossil , including skulls and partial skeletons. All specimens are on a plate that was discovered by Steiger Erler on November 19, 1901 in the mining site No. 156 in the hanging wall of the main seam in the Königin-Carola-Schacht in Freital , in the uppermost part of the Döhlen formation. The Döhlen formation belongs to the Unterrotliegend group ( Asselium ) of the Döhlen basin . The fossils are over 299 to 296.4 million years old. The lower or lying panel detached itself from the roof of the four-meter-high mine and broke on impact. The 1.00 × 1.30 meter large hanging slab was recovered from the roof under the guidance of the surveyor August Robert Hausse.
Whereabouts of the plates
The hanging slab was prepared by Christian Strunz. The find was scientifically processed and first described in 1925 by the paleontologist Friedrich von Huene . In the meantime, the plate was in the Museum of Mineralogy and Geology Dresden . Today it is located in the State Office for Environment, Agriculture and Geology in Freiberg. The lying plate was kept in its original state in the drill core archive in Freiberg until 1999. Then it was given to the Museum für Naturkunde Chemnitz for preparation. In the Natural History Museum in Schleusingen , it was prepared by Georg Sommer and scientifically processed by the paleontologist Frederik Spindler. The plate has been on display in the permanent exhibition of the Chemnitz Museum of Natural History since 2001.
description
Pantelosaurus saxonicus was about 1.40 m long. It has a stocky, pointed skull with lateral eye sockets and conical teeth. The vertebrae have relatively long, strong spinous processes up to the tail region. The tail is longer than the trunk. The short limbs have a strong bone structure and five toes each.
Classification
After von Huene's first description as a pelycosaur in 1925, Alfred Romer and Llewellyn Ivor Price revised the system and synonymized Pantelosaurus with Haptodus in 1940 , creating the new combination Haptodus saxonicus . After Phil Currie had described a new species of Haptodus in 1977 , he synonymized all European Haptodontinae and Cutleria wilmarthi in 1979 with the type species of the genus, H. baylei . In 1993 and 1994 Michel Laurin presented the Haptodontinae as a polyphyletic member of the Sphenacodontidae and revalidated Pantelosaurus together with other genera and species. His revision has since been accepted. Pantelosaurus is included in only three phylogenetic analyzes : Laurin (1994), Fröbisch et al. (2011) and Benson.
Cladogram
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| ... sphenacodontia |
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etymology
The type species of Pantelosaurus is Pantelosaurus saxonicus . The generic name is derived from ancient Greek παντελής pantelḗs "complete, complete" and refers to the almost complete state of the original fossil specimens. The type epithet is derived from the Latinized name of the Free State of Saxony.
Individual evidence
- ↑ a b c d Friedrich von Huene: A new Pelycosaurier from the lower Permformaiton Sachens . In: Geological and Paleontological Treatises . No. 18 , 1925, pp. 215-264 .
- ↑ a b c d R.J. Benson: Interrelationships of basal synapsids: cranial and postcranial morphological partitions suggest different topologies . In: Journal of Systematic Paleontology . 2012, doi : 10.1080 / 14772019.2011.631042 ( [1] ).
- ↑ R. Bull Market: A mass grave of dinosaurs in the sub-Rothliegende of Döhlener brazier in Plauen'schen basically near Dresden . In: C. Menzel (Hrsg.): Yearbook for mining and metallurgy in the Kingdom of Saxony . Craz & Gerlach, Freiberg 1902, p. 25-50 .
- ↑ a b Figure 4: Pantelosaurus saxonicus. (PDF) In: Explanatory sheet for the university picture series Leitfossilien IV. German Central Institute for Teaching Aids Berlin, 1953, p. 3 , accessed on August 29, 2016 .
- ↑ limited preview in the Google book search
- ↑ Michel Laurin: Re-evaluation of Cutleria wilmarthi , an Early Permian synapsid from Colorado . In: Journal of Vertebrate Paleontology . 1st edition. tape 14 , 1994, pp. 134-138 , doi : 10.1080 / 02724634.1994.10011544 ( [2] ).
- ↑ Jörg Fröbisch, Rainer R. Schoch, Johannes Müller, Thomas Schindler and Dieter Schweiß: A new basal sphenacodontid synapsid from the Late Carboniferous of the Saar-Nahe Basin, Germany . In: Acta Palaeontologica Polonica . 1st edition. tape 56 , 2011, p. 113–120 , doi : 10.4202 / app.2010.0039 ( [3] [PDF]).
Web links
- Prehistoric research with Saxon dinosaurs. In: sz-online.de. May 6, 2014, accessed August 29, 2016 .
- Eckardt Mildner: Research into the Saxon dinosaur plate with six skeletons from the Permian period. In: tu-freiberg.de. TU Bergakademie Freiberg, May 6, 2014, accessed on August 29, 2016 .
- Wolfgang Reichel, Manfred Schauer: The Döhlener basin near Dresden - geology and mining -. (Pdf) In: Bergbau in Sachsen, Volume 12. Saxon State Office for Environment, Agriculture and Geology, February 2007, pp. 19-29 , accessed on August 29, 2016 .
- Frederik Spindler: The basal Sphenacodontia - systematic revision and evolutionary implications. (PDF) Faculty of Geosciences, Geotechnics and Mining of the Technical University Bergakademie Freiberg, April 30, 2015, accessed on August 29, 2016 (English, dissertation).