Comment on “An early Late Triassic long-necked reptile with a bony pectoral shield and gracile appendages” by Jerzy Dzik and Tomasz Sulej

Szulc, Joachim; Racki, Grzegorz; Bodzioch, Adam

doi:10.4202/app.00352.2017

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…This interpretation contradicts the previously favoured hypotheses about a large lake, inhabited by aquatic animals and autochthonous, time-averaged bone accumulation (e.g., Dzik andSulej, 2007, 2016). The data presented, as well as published comments regarding those idea (Szulc et al, 2017), palynological analyses (Fijałkowska-Mader, 2015), and a detailed palaeoenvironmental study of the Upper Silesian Keuper (Jewuła et al, 2019) support this interpretation.…”

Section: Geological Settingsupporting

confidence: 59%

Preliminary report on the microvertebrate faunal remains from the Late Triassic locality at Krasiejów, SW Poland

Kowalski¹,

Bodzioch²,

Janecki³

et al. 2019

ASGP

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Fossil vertebrate remains of the Keuper unit from the vicinity of the village of Krasiejów located in SW Poland, have been analyzed for almost two decades. In that time, two main review papers have been published (Dzik et al., 2000;Dzik and Sulej, 2007). Since then, many detailed papers and tens of conference contributions have been published. However, the main goal of these detailed articles was focused on large vertebrates, such as

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Section: Geological Settingsupporting

confidence: 59%

Preliminary report on the microvertebrate faunal remains from the Late Triassic locality at Krasiejów, SW Poland

Kowalski¹,

Bodzioch²,

Janecki³

et al. 2019

ASGP

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“…Dzik et al (2000) favours a Carnian age based on biostratigraphy and the correlation with dated beds known from southern Germany (Lehrberg Beds; Dzik et al, 2000) and a lacustrine origin of the deposits (Dzik et al, 2000;Dzik & Sulej, 2007, 2016. However, subsequent extensive sedimentological, lithostratigraphic and taphonomic studies supported a Norian age for the deposits (Szulc, 2005;Bodzioch & Kowal-Linka, 2012;Szulc et al, , 2017 and a fluviatile origin caused by an ephemeral stream system under semi-dry climatic conditions (Szulc, 2005). Bodzioch & Kowal-Linka (2012) reconstructed a more catastrophic origin of the bone bed caused by a short-lived but high-energy flood event resulting in hydraulically segregated bone breccia, accumulating the disarticulated skeletons in the vicinity of what is today the clay pit.…”

Section: Taxonomy and Depositional Environmentmentioning

confidence: 96%

Growth and limb bone histology of aetosaurs and phytosaurs from the Late Triassic Krasiejów locality (sw Poland) reveals strong environmental influence on growth pattern

2022

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The growth pattern of the Polish phytosaur Parasuchus cf. arenaceus and the aetosaur Stagonolepis olenkae (both Krasiejów; Norian) was studied. Results were compared to published data of other members of these two groups and to a new sample of the German (Heslach; Norian) phytosaur Nicrosaurus sp. All three herein studied taxa display lamellar-zonal bone consisting predominately of parallel-fibred tissue and on average a low to moderate vascular density. Towards the outer cortex the thickness of annuli increases in most samples and becomes distinctly wider than the zones. Therefore, most of the appositional growth in adults was achieved during phases of prolonged slow growth. All bones show a diffuse growth pattern, without well demarcated zones and annuli. Distinct lines of arrested growth (lag) are not identified in the Krasiejów sample, only the Nicrosaurus femur shows one distinct lag as do other taxa outside Krasiejów. Instead, the Krasiejów taxa display multiple rest lines and sub-cycles. Thus, identification and count of annual growth cycles remains difficult, the finally counted annual growth cycles range (two to six) is quite large despite the low size range of the samples. A correlation between age and bone length is not identified, indicating developmental plasticity. Although both are archosaurs, Stagonolepis and Parasuchus are phylogenetically not closely related, however, they show a very similar growth pattern, despite different life styles (terrestrial vs. semi-aquatic). Based on the new data, and previously histological studies from Krasiejów, the local environmental conditions were special and had a strong influence on the growth pattern.

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“…Ozimek volans Dzik & Sulej, 2016 Age. Late Carnian or early Norian, Late Triassic (Dzik & Sulej, 2016;Szulc, Racki & Bodzioch, 2017).…”

Section: Raibliania Calligarisi Dalla Vecchia 2020mentioning

confidence: 99%

A new phylogenetic hypothesis of Tanystropheidae (Diapsida, Archosauromorpha) and other “protorosaurs”, and its implications for the early evolution of stem archosaurs

Spiekman

Fraser

Scheyer

2021

PeerJ

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The historical clade “Protorosauria” represents an important group of archosauromorph reptiles that had a wide geographic distribution between the Late Permian and Late Triassic. “Protorosaurs” are characterized by their long necks, which are epitomized in the genus Tanystropheus and in Dinocephalosaurus orientalis. Recent phylogenetic analyses have indicated that “Protorosauria” is a polyphyletic clade, but the exact relationships of the various “protorosaur” taxa within the archosauromorph lineage is currently uncertain. Several taxa, although represented by relatively complete material, have previously not been assessed phylogenetically. We present a new phylogenetic hypothesis that comprises a wide range of archosauromorphs, including the most exhaustive sample of “protorosaurs” to date and several “protorosaur” taxa from the eastern Tethys margin that have not been included in any previous analysis. The polyphyly of “Protorosauria” is confirmed and therefore we suggest the usage of this term should be abandoned. Tanystropheidae is recovered as a monophyletic group and the Chinese taxa Dinocephalosaurus orientalis and Pectodens zhenyuensis form a new archosauromorph clade, Dinocephalosauridae, which is closely related to Tanystropheidae. The well-known crocopod and former “protorosaur” Prolacerta broomi is considerably less closely related to Archosauriformes than was previously considered.

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Comment on “An early Late Triassic long-necked reptile with a bony pectoral shield and gracile appendages” by Jerzy Dzik and Tomasz Sulej

Cited by 10 publications

References 6 publications

Preliminary report on the microvertebrate faunal remains from the Late Triassic locality at Krasiejów, SW Poland

Preliminary report on the microvertebrate faunal remains from the Late Triassic locality at Krasiejów, SW Poland

Growth and limb bone histology of aetosaurs and phytosaurs from the Late Triassic Krasiejów locality (sw Poland) reveals strong environmental influence on growth pattern

A new phylogenetic hypothesis of Tanystropheidae (Diapsida, Archosauromorpha) and other “protorosaurs”, and its implications for the early evolution of stem archosaurs

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