A gigantic fossil arthropod trackway
نویسندگان
چکیده
منابع مشابه
The Fossil Trackway Pteraichnux Not Pterosaurian, but Crocodilian
The fossil trackway Pteraichnus saltwashensis Stokes 1957, from the Momson Formation of Arizona, originally attributed to a pterodactyloid pterosaur, is reassessed. We conclude that the assignment was incorrect because: 1 , Pteraichnus has five toes on the manus (all pterosaurs have four); and 2, pterosaurs did not walk quadrupedally. However, trackways similar in detail to the poorly preserved...
متن کاملFossil Calibrations for the Arthropod Tree of Life
Fossil age data and molecular sequences are increasingly combined to establish a timescale for the Tree of Life. Arthropods, as the most species-rich and morphologically disparate animal phylum, have received substantial attention, particularly with regard to questions such as the timing of habitat shifts (e.g., terrestrialisation), genome evolution (e.g., gene family duplication and functional...
متن کاملFossil Calibrations for the Arthropod Tree of Life Authors
Fossil age data and molecular sequences are increasingly combined to establish a timescale for the Treeof Life. Arthropods, as the most species-rich and morphologically disparate animal phylum, havereceived substantial attention, particularly with regard to questions such as the timing of habitat shifts(e.g. terrestrialisation), genome evolution (e.g. gene family duplication and fun...
متن کاملFirst record of a pterosaur landing trackway.
The terrestrial progression of pterosaurs, the flying reptiles of the Mesozoic Era, has been debated for over two centuries. The recent discovery of quadrupedal pterodactyloid pterosaur tracks from Late Jurassic sediments near Crayssac, France, shows that the hindlimbs moved parasagittally, as in mammals, birds and other dinosaurs, and the hypertrophied forelimbs could make tracks both close to...
متن کاملExploring developmental modes in a fossil arthropod: growth and trunk segmentation of the trilobite Aulacopleura konincki.
Trilobites offer the opportunity to explore postembryonic development within the fossil record of arthropod evolution. In contrast to most trilobites, the Silurian proetid Aulacopleura konincki from the Czech Republic exhibits marked variation in the mature number of thoracic segments, with five morphs with 18-22 thoracic segments. The combination of abundant articulated specimens available fro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 2005
ISSN: 0028-0836,1476-4687
DOI: 10.1038/438576a