Aublysodon mirandus Leidy, 1868

R. E. Molnar & K. Carpenter, 1989, The Jordan theropod (Maastrichtian, Montana, U. S. A.) referred to the genus Aublysodon, Géobios 22 (4), pp. 445-454 : 447

Aublysodon mirandus Leidy, 1868

fig. 4A

Deinodon horridus Leidy, 1856 (in part)

Dinodon horridus (Leidy) Cope, 1866 (in part)

Aublysodon mirandus Leidy, 1868

Aublysodon mirandus (LEIDY) Cope, 1869

Aublysodon amplus Marsh, 1892

Aublysodon cristatus Marsh, 1892

Ornithomimus altus Lambe 1902 (in part)

LECTOTYPE:

ANSP 9535 , premaxillary tooth; TMP 85.10.11 (cast of ANSP 9535) .

T ype locality:

Judith River Formation "from the vicinity of the Judith River, one of the tributaries near the source of the Missouri River." ( Leidy 1860, p. 139).

Referred material:

LACM 28471 , partial skull, including a premaxillary tooth, most of both maxillae, nasals, and frontals, the parietal and portions of the surangular and dentaries (holotype of Aublysodon molnaris ) (Heli Creek Formation, Garfield County, Montana). TMP 87.127.1 , cast of frontals and parietal of LACM 28471. Isolated teeth: NMC 116a, 1822 (Judith River Formation, Dinosaur Provincial Park, Alberta); TMP 66.31.93 , 80.8.192 , 80.16.485 , 80.16.1202 , 81.16.197 , 81.19.79 , 82.20.457 , 85.6.134 , 86.77.122 , 86.77.123 , 87.36.81 , 87.46.24 , 88.4.7 , (Judith River Formation, Dinosaur Provincial Park and adjacent area, Alberta); YPM-PU 22252 , 23328 , 23385 , 23389 , 23390 (Judith River Formation, Hill County, Montana), YPM-PU 23391 (Judith River Formation, Choteau County, Montana); YPM.PU 23387 (Two Medicine Formation, Teton County, Montana); UCMP 124367 , 124399 , 124406 , 124978 , 124979 , 124980 , 124981 , 124982 , 124994 (Hell Creek Formation, Garfield County and McCone County, Montana); TMP 87.112.33 , 87.114.7 (Heli Creek Formation, Montana); UCM 37878 , 43447 (Lance Formation, Niobrara County, Wyoming); UCMP 73091 , 73101 , 85141 , 124993 , 124995 , 124996 , 125229 , 125230 , 125233 , 125234 , 125237 (Lance Formation, Niobrara County, Wyoming); YPM 296 (holotype of Aublysodon amplus ), 297 (holotype of Aublysodon cristatus ) (Lance Formation, Niobrara, County, Wyoming); UCM 38060 (Denver Formation, Arapahoe County, Colorado); KU 12419 (Kirtland Formation, San Juan County, New Mexico). Currie (1987) has suggested that the frontal, TMP 80.16.485 , may also pertain to Aublysodon .

Revised diagnosis:

A moderate size theropod apparently with a long, low skull. Some (probably premaxillary) teeth D-shaped in cross section and lacking serrations along the posterolateral and posteromedial carinae; posterolateral carina shifted progressively further posteriorly, giving the crown a twist, in progressively more lateral premaxillary teeth. Dentaries slender with a "step" in the alveolar border just posterior to the third tooth; anteroventral border of dentaries with an acuthe angle relative to alveolar border. First dentary tooth with anterior carinae displaced medially, but not D-shaped in cross section. Except for the first dentary tooth, the dentary teeth are laterally compressed blades, as are those of the maxilla. Serrations extend about half-way down the anterior edge, and to the base of the crown on the posterior edge; anterior serrations finer than posterior ones.

Figures

Fig. 4 - Comparison of The skulls of A, Aubtysodon; B, Coelopbysis (AMNB 7224); C, Dromaeosaurus (modified from Coibert & Russell, 1969, Fig. 1); D, Velociraptor (modified from Barsbold, 1982, Fig. la); E, Sauromitboides (modified from Barsbold, 1974, Pl. 1), V, Dromiceiomimus (modified from Russell, 1972, Fig. 5, and ROM 840); G, Caegnatbus (modified from Sternberg, 1949, Fig. 1, and Barsbold, 1982, Fig. c); H, Albeltosaurus libratus (modified from Gilmore, 1946, Pl. 4, Fig. 3); I, Daspletosaurus torosus (modified from Russell, 1970, Fig. 6); J, " Albertosaurus " lancensis (modified from Gilmore, 1946, Pl. 1); H, Tyrannosaurus (modified from Osborn, 1912, Fig. 1); L, lingual (top) and labial (bottom) views of the dentaries of " Cbirostenotes " (modified from Gilmore, 1924, Fig. 3). Scale bar represents 10 cm. Comparaison des cranes des divers théropodes: A, Aubtysodon; B, Coelopbysis (AMNB 7224); C, Dromaeosaurus (modifiés d’après Colbert & Russell 1969, Fig. 1); D, Velociraptor (modifié d’après Barsbold 1982, Fig. la); E, Sauromitboides (modifié d’après Barsbold 1974, Pl. 1); F, Dromiceiomimus (modifié d’après Russell 1972, Fig. 5 et ROM 840); C, Caenagnatbus (modifié d’après Sternberg 1949, Fig. 1 et Barsbold 1982, Fig. c); H, Albertosaurus libratus (modifié d’après Gilmore 1946, PI. 4, Fig. 3); I, Daspletosaurus torosus (modifié d’après Russell 1970, Fig. 6); J, " Albertosaurud' lancensis (modifié d’après Gilmore 1946, Pl. 1); K, Tyrannosaurus (modifié d’après Osborn 1912, Fig. 1); L, les vues linguale (en haut) et labiale (en bas) des dentaires du " Cbirostenotes " (modifié d’après Gilmore 1924, Fig. 3). Echelle = 10 cm.