Doctoral School of Exact and Natural Sciences, Insitute of Geological Sciences, Jagiellonian University Cracow, Kraków, Lesser Poland Voivodeship, Poland.
Institute of Paleobiology, Polish Academy of Sciences, Warszawa, Masovia Voivodeship, Poland.
PeerJ. 2023 Jul 14;11:e15628. doi: 10.7717/peerj.15628. eCollection 2023.
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.
奥瓦多夫-布热津斯基目前是波兰中部最有前景的上侏罗统地点之一，拥有广泛的脊椎动物和无脊椎动物化石群。大型海洋爬行动物化石的发现，如鱼龙、海龟和海洋鳄形目动物，引起了人们对该地点的关注。特别值得注意的是，中生代海洋生物群中的蛇颈龙类仍然有待发现，在本报告中，我们注意到了四颗具有独特的顶底脊纹模式和拉长、锥形特征的孤立牙齿，这些特征是蛇颈龙类的典型特征。最大和最完整牙齿标本 ZPAL R.11/OB/T4 的主坐标分析（PCoA）的结果使我们能够确认其分类为蛇颈龙目。这一发现证实了该地点的重要性，它是北方和特提斯动物群混合的地区，扩大了在该地区发现的化石类群的广泛范围。与附近地区发现蛇颈龙材料的先前发现一起，它为奥瓦多夫-布热津斯基 Lägerstatte 存在蛇颈龙目提供了证据。
