Facies, depositional environment, and palaeoecology of the Middle Triassic Cassina beds (Meride Limestone, Monte San Giorgio, Switzerland)

Stockar, Rudolf

doi:10.1007/s00015-010-0008-2

Cited by 43 publications

(63 citation statements)

References 46 publications

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“…This unique ''remote'' location resulted in a peculiar sedimentary succession and in at least temporarily severe dysoxic to anoxic bottom water conditions (Kuhn-Schnyder and Vonderschmitt 1954;Zorn 1971;Rieber 1973a;Bernasconi 1994;Furrer 1995Furrer , 2003Röhl et al 2001;Etter 2002;Stockar 2010). The Middle Triassic succession at Monte San Giorgio (Fig.…”

Section: The Middle Triassic Sequence Of Monte San Giorgiomentioning

confidence: 99%

Integrated Ladinian bio-chronostratigraphy and geochrononology of Monte San Giorgio (Southern Alps, Switzerland)

2012

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Section: The Middle Triassic Sequence Of Monte San Giorgiomentioning

confidence: 99%

Integrated Ladinian bio-chronostratigraphy and geochrononology of Monte San Giorgio (Southern Alps, Switzerland)

2012

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“…Not only are the Muschelkalk invertebrate communities [31,51,74] important for facies analyses and palaeoenvironmental reconstructions, but so to are the reptile or fish (cf. [144,145]) faunas.…”

Section: Quantitative Analyses Of the Bayreuther Reptile Faunamentioning

confidence: 99%

“…Their abundance in the Germanic Basin was because of the shallow marine macroalgae-rich habitats which were absent in the Monte San Giorgio lagoons (cf. [145][146][147]). These "Triassic sea cows" [43] were not shell consumers (as has commonly been claimed without any supporting evidence: Westphal, [10,148,149], but fed on these macroalgaerich habitats of the Germanic Basin.…”

Section: Global Context Of the Germanic Basin Reptiles And Track Recordsmentioning

confidence: 99%

The Middle Triassic marine reptile biodiversity in the Germanic Basin, in the centre of the Pangaean world

Diedrich

2012

Open Geosciences

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AbstractThe Middle Triassic fossil reptile localities near Bayreuth (Bavaria, southern Germany) consist of shallow marine autochthonous glauconitic marls and terebratulid-rich tempestite carbonates of the newly defined Bindlach and Hegnabrunn formations. Single bones and incomplete skeletons of marine reptiles have been recorded in bone beds within in the Illyrian and Fassanian stages. These include the remains of the sauropterygians Neusticosaurus sp., Lariosaurus cf. buzzii [1], Nothosaurus mirabilis [2], Paranothosaurus giganteus [2], Placodus gigas [3], Cyamodus rostratus [4], Cyamodus münsteri [5], Pistosaurus longaevus [6], and ichthyosaursOmphalosaurus sp., and Shastasaurus sp. or proterosaur Tanystrophaeus conspicuus [7]. New skeletal reconstructions are based on the osteological analysis of three dimensionally preserved bones and skeletal remains. The large number of marine endemic placodont macroalgae feeders (P. gigas) in the Bayreuth sites coincides with the presence of invertebrate palaeocommunities that are characteristic of macroalgae meadow paleoenvironments. Most of the reptile species and genera from the Bayreuth localities also occur in beds of similar ages from the Monte San Giorgio (Switzerland/Italy) or Perledo (Italy) lagoonal areas. Ichthyosaurs and pistosaurs were adapted for open marine conditions, and may have migrated from the Panthalassa Oceans into the shallow marine Germanic Basin to reproduce, whereas placodonts and many other sauropterygians seem to have lived permanently in those shallow marine habitats, with large squamates and thecodont or smaller archosaurs in coastal areas.

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“…Although both an unconstricted notochord and an increased number of axial elements-and therefore joints-in the skeleton are associated with greater axial flexibility 5,44,45 , the myoseptal morphology of Saurichthys is inconsistent with this inference. Geological and ecological data suggest that S. curionii was associated with a carbonate platform environment 24,32,46 , and ARTICLE NATURE COMMUNICATIONS | DOI: 10.1038/ncomms3570 some morphological cues such as body outline and reduced squamation 12,47 are inferred to be related to good acceleration performance constrained by piscivory [48][49][50][51] . Dietary inferences are supported by stomach contents 24 .…”

Section: Discussionmentioning

confidence: 99%

Exceptional fossil preservation demonstrates a new mode of axial skeleton elongation in early ray-finned fishes

2013

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Elongate body plans have evolved independently multiple times in vertebrates, and involve either an increase in the number or in the length of the vertebrae. Here, we describe a new mechanism of body elongation in saurichthyids, an extinct group of elongate early ray-finned fishes. The rare preservation of soft tissue in a specimen of Saurichthys curionii from the Middle Triassic (Ladinian) of Switzerland provides significant new information on the relationship between the musculature and the skeleton. This new fossil material shows that elongation in these fishes results from doubling the number of neural arch-like elements per myomeric segment. This unique way of generating an elongate body plan demonstrates the evolutionary lability of the vertebral column in non-teleostean fishes. The shape and arrangement of preserved myosepta suggest that S. curionii was not a highly flexible fish, in spite of the increase in the number of neural arch-like elements.

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Facies, depositional environment, and palaeoecology of the Middle Triassic Cassina beds (Meride Limestone, Monte San Giorgio, Switzerland)

Cited by 43 publications

References 46 publications

Integrated Ladinian bio-chronostratigraphy and geochrononology of Monte San Giorgio (Southern Alps, Switzerland)

Integrated Ladinian bio-chronostratigraphy and geochrononology of Monte San Giorgio (Southern Alps, Switzerland)

The Middle Triassic marine reptile biodiversity in the Germanic Basin, in the centre of the Pangaean world

Exceptional fossil preservation demonstrates a new mode of axial skeleton elongation in early ray-finned fishes

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