Small ornithopod dinosaur tracks and crocodilian remains from the Middle Jurassic Bagå Formation, Bornholm, Denmark: Important additions to the rare Middle Jurassic vertebrate faunas of Northern Europe

Abstract

Two new small tridactyl dinosaur tracks are found in the Middle Jurassic Bagå Formation of Bornholm and are interpreted as ornithopodian in origin. A skeletal fragment is identified as a crocodilian skull fragment. Previous finds of dinosaur tracks from the locality consist of two sizes of sauropods, a medium sized theropod and thyreophorans. The addition of tracks from ornithopod dinosaurs and skeletal evidence of crocodilians now give a broader picture of a diverse Middle Jurassic vertebrate fauna. This is an important addition to the understanding of the terres-trial Mesozoic ecosystem of Denmark, and a valuable addition to the scarce Middle Jurassic vertebrate record of Europe.

A Turiasaurian (Dinosauria, Sauropoda) Tooth from the Pliensbachian Hasle Formation of Bornholm, Denmark, Shows an Early Jurassic Origin of the Turiasauria

“…Tracks and trackways of theropod and pos-sible Thyreophora dinosaurs and indeterminate skeletal remains are known from the Upper Triassic-Lower Jurassic (Rheatian-Hettangian) Høganäs Formation exposed in southern part of Sweden [27][28][29][30][31][32] and cross sections through tracks from dinosaurs or other large vertebrates are described from the Hettangian-Sinemurian Rønne Formation (Figure 1) [33]. Moving up to the Middle Jurassic, several natural casts of sauropod, theropod, thyreophorans, and ornithopod tracks, and a crocodilian skull fragment are known from the Bajocian-Bathonian part of the Bagå Formation at Bornholm (Figure 1) [34][35][36]. This makes the diverse terrestrial vertebrate fauna of the Sinemurian Hasle Formation a very important Lower Jurassic locality, as it contains not only a diverse marine fauna but also mammal-like reptiles and theropod dinosaurs, and now also the earliest known turiasaur worldwide.…”

AliceVision Meshroom

“…Meshroom has been used since 2014 in digital environment creation for the Visual Effects industry and now in many other industries including manufacturing, medical [10], cultural heritage [11], tourism , archaeology [12,13], biology [14], surveillance [15] and 3D printing.…”