The first plesiosaurian (Sauropterygia, Pliosauridae) remains described from the Jurassic of Poland

Lomax,

doi:10.26879/522

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…A fragmental crown figured by Hermann () might extend this range to the middle Callovian. Subtrihedral‐ and trihedral‐toothed pliosaurids co‐existed with conical‐toothed pliosaurids for a while: the youngest hitherto known Jurassic conical‐toothed pliosaurids were Liopleurodon ‐like specimens from the lower Oxfordian of Poland (Lomax ), upper Oxfordian to lower Kimmeridgian of Russia (Kiprijanow ; Zverkov et al . ) and Kimmeridgian of France (Lennier ) and Mexico (Barrientos‐Lara et al .…”

Section: Discussionmentioning

confidence: 99%

Increased pliosaurid dental disparity across the Jurassic–Cretaceous transition

et al. 2018

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Pliosaurid marine reptiles played important roles in marine food chains from the Middle Jurassic to the middle Cretaceous, frequently as apex predators. The evolution of pliosaurids during the later parts of the Early Cretaceous has recently been illuminated by discoveries from Russia (Hauterivian) and Colombia (Barremian). However, knowledge of pliosaurids representing the Jurassic–Cretaceous transition (late Tithonian – Valanginian), is still largely incomplete, especially during the earliest Cretaceous. As such, the effect on pliosaurids of hypothesized faunal turnover during the Jurassic–Cretaceous boundary interval is poorly understood. We report pliosaurid teeth from the upper Volgian (Tithonian, Upper Jurassic) of the Kheta river basin (Eastern Siberia, Russia), to the Berriasian and Valanginian (Lower Cretaceous) of the Volga region (European Russia). These assemblages have yielded a series of distinct tooth morphotypes, including the first reports of conical‐toothed pliosaurids from the latest Jurassic and earliest Cretaceous. This challenges the hypothesis that only one lineage of pliosaurids crossed the Jurassic–Cretaceous boundary. It appears that conical‐toothed pliosaurids co‐existed with their trihedral‐toothed relatives for at least 25 million years during the latest Jurassic and earliest Cretaceous. In fact, our quantitative analyses indicate that pliosaurids reached their maximal dental disparity during this interval, showing little evidence of turnover associated with the Jurassic–Cretaceous transition. Instead, disparity decreased later in the Early Cretaceous, with the disappearance of trihedral‐toothed forms in the Barremian.

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Section: Discussionmentioning

confidence: 99%

Increased pliosaurid dental disparity across the Jurassic–Cretaceous transition

et al. 2018

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“…One of the defining characteristics of the Plesiosauria, in contrast to the Ichthyosauria and Crocodylomorpha, is the presence of very prominent, elevated apicobasal ridges which in some cases are also accompanied by shearing carinae ( Massare, 1987 ; Lomax, 2015 ). Long-necked Plesiosauroidea, are characterized by their elongated and conical teeth with pointy apices ( Massare, 1987 , 1997 ).…”

Section: Discussionmentioning

confidence: 99%

“…However, this group is rather poorly represented and documented in Poland ( Madzia, Szczygielski & Wolniewicz, 2021 and references therein). To date, plesiosaur remains from Poland entail isolated teeth from the Aalenian of Wolin ( Deecke, 1907 ), Bathonian of Jastrząb ( Rehbinder, 1913 ), Oxfordian of the Zalas Quarry ( Molenda, 1997 ; Borszcz & Zatoń, 2009 ; Lomax, 2015 ; Bardet, Fischer & Machalski, 2015 ), and Wapiennik ( Groß, 1944 ; Tyborowski, 2019 ). Vertebrae are represented from the Callovian of Brzostówka ( Hirszberg, 1924 ) and Kimmeridgian of Piekło ( Pusch, 1837 ; Hirszberg, 1924 ).…”

Section: Introductionmentioning

confidence: 99%

Late Jurassic teeth of plesiosauroid origin from the Owadów-Brzezinki Lägerstatte, Central Poland

Weryński

Błażejowski

2023

PeerJ

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Owadów-Brzezinki is currently one of the most promising Upper Jurassic sites in Central Poland, with a wide array of both vertebrate and invertebrate fossil fauna present. The discoveries of large-bodied marine reptiles fossils such as ichthyosaurs, turtles, and marine crocodylomorphs attracted attention to the location. A particular Mesozoic marine group, plesiosaurs, remained to be found, and in this report, we note four isolated teeth with distinguishing apicobasal ridging pattern and elongated, conical shape characteristic for plesiosaurians. The outcomes of the Principal Coordinates Analysis (PCoA) of the largest and most complete tooth specimen ZPAL R.11/OB/T4 enabled us to confirm its classification as Plesiosauroidea. This discovery affirms the importance of the site as the area of mixing between Boreal and Tethyan faunas, expanding the broad spectrum of fossil taxa found in this location. Together with previous findings of plesiosaur material in a nearby region, it provides the evidence for the presence of Plesiosauroidea in Owadów-Brzezinki Lägerstatte.

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