Post by dinosauria101 on Oct 25, 2019 20:33:42 GMT 5
Edestus giganteus
Edestus is a genus of eugeneodontid holocephalids that lived throughout the world's oceans from the Late Devonian[1] to the late Carboniferous. All of the species are known only from their teeth. The term "edestid" is often used to refer to any or all members of the order Eugeneodontiformes, though, strictly speaking, "edestid" properly refers only to members of the family Edestidae. Edestus is a Greek name derived from the word edeste (to devour), in reference to the aberrant quality and size of the species' teeth.[2] The largest species, E. giganteus, could reach 6 m (20 ft) in length, the size of a modern great white shark.[3] Like its other relatives, such as Helicoprion, and unlike modern sharks, the species of Edestus grew teeth in curved brackets, and did not shed the teeth as they became worn. In Edestus' case, only a single row of teeth occurred in each jaw, so the mouth would have resembled a monstrous pair of pinking shears. The degree of curvature in the teeth brackets, along with size, are distinct in each species.
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Baryonyx walkeri
Baryonyx is a genus of theropod dinosaur which lived in the Barremian stage of the Early Cretaceous Period, about 130–125 million years ago. The first skeleton was discovered in 1983 in the Weald Clay Formation of Surrey, England, and became the holotype specimen of B. walkeri, named by palaeontologists Alan J. Charig and Angela C. Milner in 1986. The generic name, Baryonyx, means "heavy claw" and alludes to the animal's very large claw on the first finger; the specific name, walkeri, refers to its discoverer, amateur fossil collector William J. Walker. The holotype specimen is one of the most complete theropod skeletons from the UK (and remains the most complete spinosaurid), and its discovery attracted media attention. Specimens later discovered in other parts of the United Kingdom and Iberia have also been assigned to the genus. The holotype specimen, which may not have been fully grown, was estimated to have been between 7.5 and 10 m (25 and 33 ft) long and to have weighed between 1.2 and 1.7 t (1.3 and 1.9 short tons). Baryonyx had a long, low, and narrow snout, which has been compared to that of a gharial. The tip of the snout expanded to the sides in the shape of a rosette. Behind this, the upper jaw had a notch which fitted into the lower jaw (which curved upwards in the same area). It had a triangular crest on the top of its nasal bones. Baryonyx had a large number of finely serrated, conical teeth, with the largest teeth in front. The neck formed an S-shape, and the neural spines of its dorsal vertebrae increased in height from front to back. One elongated neural spine indicates it may have had a hump or ridge along the centre of its back. It had robust forelimbs, with the eponymous first-finger claw measuring about 31 cm (12 in) long. Baryonyx may have had semiaquatic habits, and coexisted with other theropod, ornithopod, and sauropod dinosaurs, as well as pterosaurs, crocodiles, turtles and fishes, in a fluvial environment.
encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRrqcCMceCo2LrejX4kxpuo-0fN4MC2OVwwg-YAThSpRKexSCdJ
Credit to Wikipedia
NOTE: Consider this one in shallow water
Edestus is a genus of eugeneodontid holocephalids that lived throughout the world's oceans from the Late Devonian[1] to the late Carboniferous. All of the species are known only from their teeth. The term "edestid" is often used to refer to any or all members of the order Eugeneodontiformes, though, strictly speaking, "edestid" properly refers only to members of the family Edestidae. Edestus is a Greek name derived from the word edeste (to devour), in reference to the aberrant quality and size of the species' teeth.[2] The largest species, E. giganteus, could reach 6 m (20 ft) in length, the size of a modern great white shark.[3] Like its other relatives, such as Helicoprion, and unlike modern sharks, the species of Edestus grew teeth in curved brackets, and did not shed the teeth as they became worn. In Edestus' case, only a single row of teeth occurred in each jaw, so the mouth would have resembled a monstrous pair of pinking shears. The degree of curvature in the teeth brackets, along with size, are distinct in each species.
s3-us-west-1.amazonaws.com/scifindr/articles/image2s/000/000/661/large/edestus.jpg?1444871223
Baryonyx walkeri
Baryonyx is a genus of theropod dinosaur which lived in the Barremian stage of the Early Cretaceous Period, about 130–125 million years ago. The first skeleton was discovered in 1983 in the Weald Clay Formation of Surrey, England, and became the holotype specimen of B. walkeri, named by palaeontologists Alan J. Charig and Angela C. Milner in 1986. The generic name, Baryonyx, means "heavy claw" and alludes to the animal's very large claw on the first finger; the specific name, walkeri, refers to its discoverer, amateur fossil collector William J. Walker. The holotype specimen is one of the most complete theropod skeletons from the UK (and remains the most complete spinosaurid), and its discovery attracted media attention. Specimens later discovered in other parts of the United Kingdom and Iberia have also been assigned to the genus. The holotype specimen, which may not have been fully grown, was estimated to have been between 7.5 and 10 m (25 and 33 ft) long and to have weighed between 1.2 and 1.7 t (1.3 and 1.9 short tons). Baryonyx had a long, low, and narrow snout, which has been compared to that of a gharial. The tip of the snout expanded to the sides in the shape of a rosette. Behind this, the upper jaw had a notch which fitted into the lower jaw (which curved upwards in the same area). It had a triangular crest on the top of its nasal bones. Baryonyx had a large number of finely serrated, conical teeth, with the largest teeth in front. The neck formed an S-shape, and the neural spines of its dorsal vertebrae increased in height from front to back. One elongated neural spine indicates it may have had a hump or ridge along the centre of its back. It had robust forelimbs, with the eponymous first-finger claw measuring about 31 cm (12 in) long. Baryonyx may have had semiaquatic habits, and coexisted with other theropod, ornithopod, and sauropod dinosaurs, as well as pterosaurs, crocodiles, turtles and fishes, in a fluvial environment.
encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRrqcCMceCo2LrejX4kxpuo-0fN4MC2OVwwg-YAThSpRKexSCdJ
Credit to Wikipedia
NOTE: Consider this one in shallow water