We present a new tracksite with multiple dinosaur tracks from the lowermost Barremian (Lower Cretaceous) of the Cape Espichel (Sesimbra, Portugal). The tracks are localized on three beds on the top carbonate beds of t...We present a new tracksite with multiple dinosaur tracks from the lowermost Barremian (Lower Cretaceous) of the Cape Espichel (Sesimbra, Portugal). The tracks are localized on three beds on the top carbonate beds of the Areia do Mastro Formation. Those bioclastic, nodular limestones were deposited in a very shallow subtidal-intertidal, restricted lagoon environment. The track surfaces are very dinoturbated, with a substantial number of tracks. Several tracks assign to sauropods, ornithopods and theropods dinosaurs were recorded. Due to heavy bioturbation and the preservation conditions, it is not possible to define trackways;some preliminary work done on the tracks could disclose some behaviours of their producers. Several species of carnivore and herbivore dinosaurs crossed that large area at different times. Herbivores may have used the lagoon margin as passage between feeding spots, while carnivores frequented the area to hunt in groups or individually.展开更多
Discovered in 1962,the Columbeira cave has a Mousterian sequence dated between 101 and 35 Ka(U-series)and between 28,900 and 18,000 BP 14C.Excavations recovered abundant lithic implements and provided rich assemblage ...Discovered in 1962,the Columbeira cave has a Mousterian sequence dated between 101 and 35 Ka(U-series)and between 28,900 and 18,000 BP 14C.Excavations recovered abundant lithic implements and provided rich assemblage of vertebrates,including mammals,reptiles,birds and a remain of Homo neanderthalensis.In this work,authors present the taxonomy at the level of genus and species of the bird assemblage and its possible relationship with the paleoenvironments in which they lived.Thirteen species of birds have been identified out of 283 bones.Most of these bones are very fragmented and unsuitable for identification down to species or the genus level.Nevertheless,it is possible to say that the species vary through the sequence and that the assemblage is dominated by Pyrrhocorax,Corvus,Columba Turdus and Alectoris.展开更多
文摘We present a new tracksite with multiple dinosaur tracks from the lowermost Barremian (Lower Cretaceous) of the Cape Espichel (Sesimbra, Portugal). The tracks are localized on three beds on the top carbonate beds of the Areia do Mastro Formation. Those bioclastic, nodular limestones were deposited in a very shallow subtidal-intertidal, restricted lagoon environment. The track surfaces are very dinoturbated, with a substantial number of tracks. Several tracks assign to sauropods, ornithopods and theropods dinosaurs were recorded. Due to heavy bioturbation and the preservation conditions, it is not possible to define trackways;some preliminary work done on the tracks could disclose some behaviours of their producers. Several species of carnivore and herbivore dinosaurs crossed that large area at different times. Herbivores may have used the lagoon margin as passage between feeding spots, while carnivores frequented the area to hunt in groups or individually.
文摘Discovered in 1962,the Columbeira cave has a Mousterian sequence dated between 101 and 35 Ka(U-series)and between 28,900 and 18,000 BP 14C.Excavations recovered abundant lithic implements and provided rich assemblage of vertebrates,including mammals,reptiles,birds and a remain of Homo neanderthalensis.In this work,authors present the taxonomy at the level of genus and species of the bird assemblage and its possible relationship with the paleoenvironments in which they lived.Thirteen species of birds have been identified out of 283 bones.Most of these bones are very fragmented and unsuitable for identification down to species or the genus level.Nevertheless,it is possible to say that the species vary through the sequence and that the assemblage is dominated by Pyrrhocorax,Corvus,Columba Turdus and Alectoris.
