Post by dinosauria101 on Oct 18, 2019 16:46:54 GMT 5
Oxalaia quilombensis
Oxalaia (in reference to the African deity Oxalá) is a genus of spinosaurid theropod dinosaur that lived in what is now the Northeast Region of Brazil during the Cenomanian stage of the Late Cretaceous Period, sometime between 100.5 and 93.9 million years ago. Its only known fossils were found in 1999 on Cajual Island in the rocks of the Alcântara Formation, which is known for its abundance of fragmentary, isolated fossil specimens. The holotype praemaxillae are together approximately 201 mm (7.9 in) long, with a preserved width of 115 mm (4.5 in) (maximal estimated original width is 126 mm (5.0 in)), and a height of 103 mm (4.1 in). Based on skeletal material from related spinosaurids, the skull of Oxalaia would have been an estimated 1.35 m (4 ft 5 in) long; this is smaller than Spinosaurus's skull, which was approximated at 1.75 m (5 ft 9 in) long by Italian palaeontologist Cristiano Dal Sasso and colleagues in 2005.[16] Kellner and his team compared the Dal Sasso specimen (MSNM V4047) to Oxalaia's original snout in 2011; from this they estimated Oxalaia at 12 to 14 metres (39 to 46 ft) in length and 5 to 7 tonnes (5.5 to 7.7 short tons) in weight, making it the largest known theropod from Brazil.
2.bp.blogspot.com/-QDd7d3WslTA/T57QHD-4wQI/AAAAAAAAL7U/EJV2uZCv-ZA/s280/Oxalaia_quilombensis-hez.png
Otodus obliquus
Otodus obliquus is an extinct mackerel shark which lived during the Paleocene and Eocene epochs, approximately about 60 to 37.5 million years ago. This shark is known from the fossil teeth and fossilized vertebral centra. Like other elasmobranchs, the skeleton of Otodus was composed of cartilage and not bone, resulting in relatively few preserved skeletal structures appearing within the fossil record. The teeth of this shark are large with triangular crown, smooth cutting edges, and visible cusps on the roots. Some Otodus teeth also show signs of evolving serrations. The fossils of Otodus indicate that it was a very large macro-predatory shark. The largest known teeth measure about 104 millimetres (4.1 in) in height. The vertebral centrum of this shark are over 12.7 cm (5 inch) wide. The fossils of Otodus indicate that it was a very large macro-predatory shark. The largest known teeth measure about 104 millimetres (4.1 in) in height. The vertebral centrum of this shark are over 12.7 cm (5 inch) wide. Scientists suggest that this shark at least reached 9.1 metres (30 ft) in total length (TL), with a maximum length of 12.2 metres (40 ft). Otodus was a widespread species, as its remains have been excavated from Africa, Asia, Europe, and North America. O. obliquus likely preyed upon marine mammals, large bony fish, and other sharks. It was among the top predators of its time.
www.sheppeyfossils.com/images/shark_teeth/Otodus_obliquus_3_FC.jpg
Credit to Wikipedia
A scaled up version of GWS vs Baryonyx!
Oxalaia (in reference to the African deity Oxalá) is a genus of spinosaurid theropod dinosaur that lived in what is now the Northeast Region of Brazil during the Cenomanian stage of the Late Cretaceous Period, sometime between 100.5 and 93.9 million years ago. Its only known fossils were found in 1999 on Cajual Island in the rocks of the Alcântara Formation, which is known for its abundance of fragmentary, isolated fossil specimens. The holotype praemaxillae are together approximately 201 mm (7.9 in) long, with a preserved width of 115 mm (4.5 in) (maximal estimated original width is 126 mm (5.0 in)), and a height of 103 mm (4.1 in). Based on skeletal material from related spinosaurids, the skull of Oxalaia would have been an estimated 1.35 m (4 ft 5 in) long; this is smaller than Spinosaurus's skull, which was approximated at 1.75 m (5 ft 9 in) long by Italian palaeontologist Cristiano Dal Sasso and colleagues in 2005.[16] Kellner and his team compared the Dal Sasso specimen (MSNM V4047) to Oxalaia's original snout in 2011; from this they estimated Oxalaia at 12 to 14 metres (39 to 46 ft) in length and 5 to 7 tonnes (5.5 to 7.7 short tons) in weight, making it the largest known theropod from Brazil.
2.bp.blogspot.com/-QDd7d3WslTA/T57QHD-4wQI/AAAAAAAAL7U/EJV2uZCv-ZA/s280/Oxalaia_quilombensis-hez.png
Otodus obliquus
Otodus obliquus is an extinct mackerel shark which lived during the Paleocene and Eocene epochs, approximately about 60 to 37.5 million years ago. This shark is known from the fossil teeth and fossilized vertebral centra. Like other elasmobranchs, the skeleton of Otodus was composed of cartilage and not bone, resulting in relatively few preserved skeletal structures appearing within the fossil record. The teeth of this shark are large with triangular crown, smooth cutting edges, and visible cusps on the roots. Some Otodus teeth also show signs of evolving serrations. The fossils of Otodus indicate that it was a very large macro-predatory shark. The largest known teeth measure about 104 millimetres (4.1 in) in height. The vertebral centrum of this shark are over 12.7 cm (5 inch) wide. The fossils of Otodus indicate that it was a very large macro-predatory shark. The largest known teeth measure about 104 millimetres (4.1 in) in height. The vertebral centrum of this shark are over 12.7 cm (5 inch) wide. Scientists suggest that this shark at least reached 9.1 metres (30 ft) in total length (TL), with a maximum length of 12.2 metres (40 ft). Otodus was a widespread species, as its remains have been excavated from Africa, Asia, Europe, and North America. O. obliquus likely preyed upon marine mammals, large bony fish, and other sharks. It was among the top predators of its time.
www.sheppeyfossils.com/images/shark_teeth/Otodus_obliquus_3_FC.jpg
Credit to Wikipedia
A scaled up version of GWS vs Baryonyx!