Abstract - A new tracksite located in the Mesozoic autochthonous series
covering the Aiguilles Rouges Massif, circa 7 km to the NNE of the tracksite of
the Vieux Emosson, is briefly described. The trampled bed is most likely coeval
with the outcrop in the Vieux Emosson area. Two poorly preserved quadrupedal
trackways, almost parallel, measure 9.8 and 8 m in length, respectively. They
are referred to the Chirotheriidae ABEL, 1835 form-family. A short and
well-preserved quadrupedal trackway, composed of two manus-pes couples, is
assigned to Chirotherium cf. barthii KAUP, 1835. A
reinterpretation of the Vieux Emosson ichnotaxa reveals that most tracks, if not
all, belong to indeterminate chirotheriid and that no clear evidence of dinosaur
footprints is observed. The trampled bed of the cover of the Aiguilles Rouges
Massif probably forms a megatracksite, which is Early or Middle Triassic in age.
Showing posts with label Europe. Show all posts
Showing posts with label Europe. Show all posts
New Paper on Permo-triassic Therapsids from Eastern Europe
M. F. Ivakhnenko, M. F. 2011. Permian and Triassic Therocephals (Eutherapsida) of Eastern Europe. Paleontological Journal 45: 981-1144 DOI: 10.1134/S0031030111090012
Abstract - Cranial morphology of Permian and Triassic Therocephalia of Eastern Europe is revised. The Therocephalia are regarded as an order of the subclass Eutherapsida of the class Theromorpha. Phylogenetic relationships are reconsidered and a tentative taxonomic scheme of the order is proposed. Biomorph evolution of East European Therocephalia from the Middle Permian to the Middle Triassic are discussed.
Abstract - Cranial morphology of Permian and Triassic Therocephalia of Eastern Europe is revised. The Therocephalia are regarded as an order of the subclass Eutherapsida of the class Theromorpha. Phylogenetic relationships are reconsidered and a tentative taxonomic scheme of the order is proposed. Biomorph evolution of East European Therocephalia from the Middle Permian to the Middle Triassic are discussed.
Middle Triassic Lobsters from the Netherlands
Klompmaker, A. A., and R. H. B. Fraaije. 2011. The oldest (Middle Triassic, Anisian) lobsters from the Netherlands: taxonomy, taphonomy, paleoenvironment, and paleoecology. Palaeontologia Electronica 14.1.1A.
Abstract - Fossil lobsters from the Netherlands have been described only rarely. This article describes the oldest, marine lobsters from the Netherlands in Middle Triassic Anisian (Muschelkalk) sediments cropping out in the Winterswijk quarry complex. The lobsters include the erymids Clytiopsis argentoratensis and Oosterinkia neerlandica n. gen., n. sp., and the mecochirid Pseudoglyphea cf. P. spinosa. They lived in a low energy, stressed environment with fluctuating salinity levels. This fluctuation might have caused the limited size of the specimens of Clytiopsis argentoratensis compared to related stratigraphically younger and older lobsters. In addition, the low number of specimens collected over decades and the low number of crustacean species is likely to be caused by a combination of the environment itself and a limited preservation potential.
Abstract - Fossil lobsters from the Netherlands have been described only rarely. This article describes the oldest, marine lobsters from the Netherlands in Middle Triassic Anisian (Muschelkalk) sediments cropping out in the Winterswijk quarry complex. The lobsters include the erymids Clytiopsis argentoratensis and Oosterinkia neerlandica n. gen., n. sp., and the mecochirid Pseudoglyphea cf. P. spinosa. They lived in a low energy, stressed environment with fluctuating salinity levels. This fluctuation might have caused the limited size of the specimens of Clytiopsis argentoratensis compared to related stratigraphically younger and older lobsters. In addition, the low number of specimens collected over decades and the low number of crustacean species is likely to be caused by a combination of the environment itself and a limited preservation potential.
Subscribe to:
Posts (Atom)