[D] Colonosaurus mudgei [~/~]
Describer
Marsh, 1872
Time
Cretaceous Late
Classification
Saurischia Theropoda Tetanurae Coelurosauria Maniraptora Avialae Ornithothoraces Ornithurae Cartinatae Ichtyornithiformes
Fossilsite
Niobrara Chalk Formation, Kansas, US
Fall Under
Ichthyornis dispar
Info
Ichthyornis dispar (Marsh, 1872) [= Colonosaurus mudgei (Marsh, 1872) including Ichthyornis agilis (Marsh, 1873); Graculavus agilis (Marsh, 1873); Ichthyornis anceps (Marsh, 1872); Graculavus anceps (Marsh, 1872); Ichthyornis victor (Marsh, 1876); Ichthyornis validus (Marsh, 1880); Ichthyornis antecessor (Wetmore, 1962); Plegadornis antecessor (Wetmore, 1962); Angelinornis antecessor (Wetmore, 1962)
Partial jaw first thought being a theropod.
Marsh, O. C. (1872) Notice of a new reptile from the Cretaceous. Amer. Journal of Science, Series 3. 4(23):406.
An interesting addition to the reptilian fauna of the Cretaceous shale of Kansas is a very small Saurian, which differs widely from any hereto discovered. The only remains at present known are two lower jaws, nearly perfect, and with many of the teeth in good preservation. The jaws resemble in general form those of the Mosasauroid reptiles, but, aside from their very diminutive size, present several features which no species of that group has been observed to possess. The teeth are implanted in distinct sockets, and are directed obliquely backward. There were apparently twenty teeth in each jaw, all compressed, and with very acute summits. The rami were united in front only by cartilage. There is no distinct groove on their inner surface, as in all known Mosasauroids. The dentigerous portion of the jaw is 41 mm in length, its depth below the last tooth is 5 mm and below the first tooth in front 3 mm. The specimen clearly indicates a new genus which may be called Colonosaurus, and the species may be named Colonosaurus mudgei for the discover Prof. B. F. Mudge, who found the remains in the upper Cretaceous shale of Western Kansas.
Marsh, 1872
Time
Cretaceous Late
Classification
Saurischia Theropoda Tetanurae Coelurosauria Maniraptora Avialae Ornithothoraces Ornithurae Cartinatae Ichtyornithiformes
Fossilsite
Niobrara Chalk Formation, Kansas, US
Fall Under
Ichthyornis dispar
Info
Ichthyornis dispar (Marsh, 1872) [= Colonosaurus mudgei (Marsh, 1872) including Ichthyornis agilis (Marsh, 1873); Graculavus agilis (Marsh, 1873); Ichthyornis anceps (Marsh, 1872); Graculavus anceps (Marsh, 1872); Ichthyornis victor (Marsh, 1876); Ichthyornis validus (Marsh, 1880); Ichthyornis antecessor (Wetmore, 1962); Plegadornis antecessor (Wetmore, 1962); Angelinornis antecessor (Wetmore, 1962)
Partial jaw first thought being a theropod.
Marsh, O. C. (1872) Notice of a new reptile from the Cretaceous. Amer. Journal of Science, Series 3. 4(23):406.
An interesting addition to the reptilian fauna of the Cretaceous shale of Kansas is a very small Saurian, which differs widely from any hereto discovered. The only remains at present known are two lower jaws, nearly perfect, and with many of the teeth in good preservation. The jaws resemble in general form those of the Mosasauroid reptiles, but, aside from their very diminutive size, present several features which no species of that group has been observed to possess. The teeth are implanted in distinct sockets, and are directed obliquely backward. There were apparently twenty teeth in each jaw, all compressed, and with very acute summits. The rami were united in front only by cartilage. There is no distinct groove on their inner surface, as in all known Mosasauroids. The dentigerous portion of the jaw is 41 mm in length, its depth below the last tooth is 5 mm and below the first tooth in front 3 mm. The specimen clearly indicates a new genus which may be called Colonosaurus, and the species may be named Colonosaurus mudgei for the discover Prof. B. F. Mudge, who found the remains in the upper Cretaceous shale of Western Kansas.