Post by dinosauria101 on Apr 8, 2019 20:35:18 GMT 5
Cynthiacetus maxwelli
Cynthiacetus is an extinct genus of basilosaurid early whale that lived during the Late Eocene (Bartonian-Priabonian, 40.4 to 33.9 million years ago.) Specimens have been found in the southeastern United States and Peru (Otuma Formation). The skull of Cynthiacetus was similar in size and morphology to that of Basilosaurus, but Cynthiacetus lacked the elongated vertebrae of Basilosaurus. Uhen 2005 erected the genus to avoid the nomen dubium Pontogeneus (which was based on poorly described and now vanished specimens). Cynthiacetus was smaller than Masracetus. The South American species C. peruvianus, the first archaeocete to be described on that continent, mainly differs from C. maxwelli in the number of cuspids in the lower premolars, but it also has the greatest numbers of thoracic vertebrae.
Kronosaurus queenslandicus
Kronosaurus (meaning "lizard of Kronos") is an extinct genus of short-necked pliosaur. With an estimated length of 9 to 10.5 metres (30 to 34 ft), it was among the largest pliosaurs, and is named after the leader of the Greek Titans, Cronus. It lived in the Early Cretaceous period (Aptian to Late Albian). Fossil material has been recovered from the Toolebuc Formation (middle to late Albian) and Wallumbilla Formations (Aptian) of Queensland and New South Wales in Australia, and from the upper Paja Formation (late Aptian) in Boyacá, Colombia, and assigned to two species. Current estimates put Kronosaurus at around 9 to 10.5 metres (30 to 34 ft) in length. In 2009, K. queenslandicus was estimated to weigh up to 11,000 kilograms (11 t). The strength of the limb girdles, combined with evidence of large, powerful swimming muscles, indicates that Kronosaurus was likely a fast, active swimmer. Kronosaurus teeth exceed 7 centimetres (2.8 in) in length (the largest up to 30 centimetres (12 in) long with 12 centimetres (4.7 in) crowns). However, they lack carinae (cutting edges) and the distinct trihedral (three facets) of Pliosaurus and Liopleurodon teeth.
Credit to Wikipedia
Cynthiacetus is an extinct genus of basilosaurid early whale that lived during the Late Eocene (Bartonian-Priabonian, 40.4 to 33.9 million years ago.) Specimens have been found in the southeastern United States and Peru (Otuma Formation). The skull of Cynthiacetus was similar in size and morphology to that of Basilosaurus, but Cynthiacetus lacked the elongated vertebrae of Basilosaurus. Uhen 2005 erected the genus to avoid the nomen dubium Pontogeneus (which was based on poorly described and now vanished specimens). Cynthiacetus was smaller than Masracetus. The South American species C. peruvianus, the first archaeocete to be described on that continent, mainly differs from C. maxwelli in the number of cuspids in the lower premolars, but it also has the greatest numbers of thoracic vertebrae.
Kronosaurus queenslandicus
Kronosaurus (meaning "lizard of Kronos") is an extinct genus of short-necked pliosaur. With an estimated length of 9 to 10.5 metres (30 to 34 ft), it was among the largest pliosaurs, and is named after the leader of the Greek Titans, Cronus. It lived in the Early Cretaceous period (Aptian to Late Albian). Fossil material has been recovered from the Toolebuc Formation (middle to late Albian) and Wallumbilla Formations (Aptian) of Queensland and New South Wales in Australia, and from the upper Paja Formation (late Aptian) in Boyacá, Colombia, and assigned to two species. Current estimates put Kronosaurus at around 9 to 10.5 metres (30 to 34 ft) in length. In 2009, K. queenslandicus was estimated to weigh up to 11,000 kilograms (11 t). The strength of the limb girdles, combined with evidence of large, powerful swimming muscles, indicates that Kronosaurus was likely a fast, active swimmer. Kronosaurus teeth exceed 7 centimetres (2.8 in) in length (the largest up to 30 centimetres (12 in) long with 12 centimetres (4.7 in) crowns). However, they lack carinae (cutting edges) and the distinct trihedral (three facets) of Pliosaurus and Liopleurodon teeth.
Credit to Wikipedia