How many Upper Triassic bone-bearing levels are there in Upper Silesia (southern Poland)? A critical overview of stratigraphy and facies

Szulc, Joachim; Racki, Grzegorz; Jewuła, Karol; Środoń, Jan

doi:10.14241/asgp.2015.037

Cited by 20 publications

(16 citation statements)

References 100 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to complex stratigraphic studies of the Upper Silesian Keuper, the bone-bearing beds were deposited in the early Norian times (Racki & Szulc, 2014; Szulc, Racki & Jewupła, 2015a; Szulc et al, 2015b). However, biochronological data uphold the Late Carnian age (e.g., Dzik & Sulej, 2007; Lucas, Spielmann & Hunt, 2007; Lucas, 2015).…”

Section: Methodsmentioning

confidence: 99%

Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

Gruntmejer

Konietzko-Meier

Bodzioch

2016

PeerJ

View full text Add to dashboard Cite

In this study, 21 skull bones of Metoposaurus krasiejowensis from the Late Triassic of Poland were investigated histologically. Dermal bones show a diploë structure, with an ornamented external surface. The ridges consist of mostly well vascularized parallel-fibered bone; the valleys are built of an avascular layer of lamellar bone. The thick middle region consists of cancellous bone, with varying porosity. The thin and less vascularized internal cortex consists of parallel-fibered bone. The numerous Sharpey’s fibers and ISF are present in all bones. The cyclicity of growth is manifested as an alternation of thick, avascular annuli and high vascularized zones as well as a sequence of resting lines. The detailed histological framework of dermal bones varies even within a single bone; this seems to be related to the local biomechanical loading of the particular part of the skull. The dynamic processes observed during the ornamentation creation indicate that the positions of the ridges and grooves change during growth and could be a specific adaptation to changing biomechanical conditions and stress distribution during bone development. In the supratemporal, the cementing lines show that the remodeling process could be involved in the creations of sculpture. The common occurrence of ISF suggests that metaplastic ossification plays an important role during cranial development. Endochondral bones preserved the numerous remains of calcified cartilage. This indicates that ossification follows a pattern known for stereospondyl intercentra, with relatively slow ossification of the trabecular part and late development of the periosteal cortex. The large accumulation of Sharpey’s fibers in the occipital condyles indicates the presence of strong muscles and ligaments connecting the skull to the vertebral column.

show abstract

Section: Methodsmentioning

confidence: 99%

Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

Gruntmejer

Konietzko-Meier

Bodzioch

2016

PeerJ

View full text Add to dashboard Cite

show abstract

“…Proximity of Poręba, Silesian Voivodship, southern Poland, lower part of Patoka Member of the Grabowa Formation (formerly Zbąszynek Beds), middle Norian (Szulc et al . ; Szczygielski & Sulej () and references therein).…”

Section: Descriptionmentioning

confidence: 98%

The early composition and evolution of the turtle shell (Reptilia, Testudinata)

Szczygielski

Sulej

2018

Palaeontology

View full text Add to dashboard Cite

The shell of the oldest true turtle (Testudinata) branch (Proterochersidae) from the Late Triassic (Norian) of Poland and Germany was built in its anterior and posterior part from an osteodermal mosaic which developed several million years after the plastron, neurals and costal bones. We provide the most detailed description of the shell composition in proterochersids to date, together with a review of the shell composition in other Triassic pantestudinates. A scenario of early evolution of the turtle shell is proposed based on new data, and the possible adaptive meaning of the observed evolutionary changes is discussed. These observations are consistent with the trend of shell simplification previously reported in turtles. Several aspects of proterochersid shell anatomy are intermediate between Odontochelys semitestacea and more derived turtles, supporting their stem phylogenetic position. Three additional ossifications were sutured to xiphiplastra and pelvis in Proterochersis spp. and at least in some individuals the nuchal bone was paired. The peripherals, suprapygals, and pygal bone are most likely to be of osteodermal origin and homologous to the proterochersid shell mosaic.

show abstract

“…, see Milner & Schoch ; Szulc , Szulc et al . ). In Germany, M. krasiejowensis is found in the Kielsandstein (upper Weser Formation, Milner & Schoch ) which is the first unit of the Norian.…”

Section: Discussionmentioning

confidence: 97%

“…This is also the case under the ‘short Norian’ hypothesis, in which the Krasiejów bonebed is situated at the base of the Norian stage (Szulc et al . ).…”

Section: Discussionmentioning

confidence: 97%

Redescription of Arganasaurus (Metoposaurus) azerouali (Dutuit) comb. nov. from the Upper Triassic of the Argana Basin (Morocco), and the first phylogenetic analysis of the Metoposauridae (Amphibia, Temnospondyli)

Buffa

Steyer

2019

Papers in Palaeontology

View full text Add to dashboard Cite

A systematic revision of the temnospondyl 'Metoposaurus' azerouali Dutuit from the Late Triassic of the Argana Basin (Western High Atlas, Morocco) is presented. The type material is redescribed in detail, and a preliminary phylogenetic analysisthe first one dealing with all metoposaurid speciesis also conducted in order to test its position within the Metoposauridae. Our analysis places 'Metoposaurus' azerouali as sister-taxon to Arganasaurus lyazidi in a robust clade supported by two unambiguous synapomorphies (bulge-like tabular horn and exoccipital process visible in dorsal view) and two ambiguous synapomorphies (cultriform process of uniform width and subtriangular posterior Meckelian fenestra). We therefore propose the new combination Arganasaurus azerouali comb. nov. for the species 'M.' azerouali. Our analysis also confirms that the central Laurasian genus Metoposaurus is monophyletic but not the genus Koskinonodon, which deserves its own systematic revision. By consequent, the Late Triassic rich vertebrate fauna from the Argana Basin comprises the metoposauroid Almasaurus habazzi, the basal metoposaurid Dutuitosaurus ouazzoui, and the genus Arganasaurus which is represented by the type species A. lyazidi and A. azerouali comb. nov. Combined with the stratigraphical and geographical occurrences of the taxa, our phylogenetic analysis suggests that metoposaurids may have appeared during the Longobardian (late Ladinian) in central Pangea. Their diversification may be linked to the Carnian Pluvial Episode. At least, their extinction may have occurred during the Rhaetian because of the aridification of the climate and/or competition with amniotes.

show abstract

How many Upper Triassic bone-bearing levels are there in Upper Silesia (southern Poland)? A critical overview of stratigraphy and facies

Abstract: How many Upper Triassic bone-bearing levels are there in Upper Silesia (southern Poland)? A critical overview of stratigraphy and facies.

Cited by 20 publications

References 100 publications

Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

The early composition and evolution of the turtle shell (Reptilia, Testudinata)

Redescription of Arganasaurus (Metoposaurus) azerouali (Dutuit) comb. nov. from the Upper Triassic of the Argana Basin (Morocco), and the first phylogenetic analysis of the Metoposauridae (Amphibia, Temnospondyli)

Contact Info

Product

Resources

About