期刊
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷 468, 期 -, 页码 228-262出版社
ELSEVIER
DOI: 10.1016/j.palaeo.2016.12.003
关键词
Vertebrate taphonomy; Nesting site; Dinosaur eggs; Dinosaur hatchlings; Late Cretaceous; Romania
资金
- National Geographic Society [3510-87]
- National Science Foundation [INT-8619987]
- Romanian Academy of Sciences [GAR 165/1997, 39/2001-2002]
- National Research Council of Romania (CNCSIS - UEFISCDI) [1163 CNCSIS-A/2004, 1677 CNCSIS-A/2007, 1930 IDEI PCE/2009]
- university of Bucharest
- university of Petrosani
- Hidroconstructia SA - Raul Mare
- Mayoralty of General Berthelot
- MTA Lendalet Program [95102]
- Campus Hungary Fellowship (Balassi Institute) [CHP/121-10/2014]
- National Research, Development and Innovation Office [K116665]
The Tu tea vertebrate locality, at Oltoane Hill (northwestern part of the Hateg Basin, Romania), has provided a rich and diverse assemblage of Late Cretaceous (Maastrichtian) continental vertebrates. More than 800 vertebrate fossils were recovered from this locality; the isolated and associated remains represent 21 different taxa including amphibians, turtles, lizards, snakes, crocodyliforms, pterosaurs, dinosaurs and mammals. The local assemblage is overwhelmingly dominated by dinosaurs, with the rhabdodontid Zalmoxes as the most abundant taxon. The bonebeds that yielded this fossil material occur in a stacked series of mudstone/calcrete units belonging to the middle member of the Densu-Ciula Formation. The taphonomical investigations suggest that the Tultea assemblage is made up of attritionally accumulated politaxic remains and that it is a parautochthonous assemblage with no evidence for significant bone transport or reworking. According to the synthesis of all available field data two outstanding fossiliferous levels can be identified within the Tutea locality, where Megaloolithus eggs and hadrosauroid hatchling material are preserved together, recognized here as two superposed nesting grounds. Such co-occurrence was considered controversial, since there is a long-standing and quasi-general consensus that eggs of the Megaloolithus oogenus were laid by titanosaurian sauropods. We present several alternative scenarios to account for the co-occurrence of Telmatosaurus hatchling remains and megaloolithid eggs in the nesting horizons and explore these alternative hypotheses by weighing the arguments supporting or contradicting them. The burden of evidence derived from our sedimentological, taphonomical and palaeoecological investigations at Tu tea is still in favour of the autochthony of the hatchlings, preserved within their own nesting grounds, whereas there is no such support for a titanosaurian origin of the Tu tea megaloolithid eggs. (C) 2016 Elsevier B.V. All rights reserved.
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