Ornithomimosauria Barsbold 1976
Creators: name: Rauhut, Oliver W. M.
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Ornithomimosauria

description: Ornithomimosauria Barsbold, 1976 <i>a</i> <i>Included taxa. Deinocheirus mirificus Osmólska and Roniewicz, 1969</i>; <i>Garudimimus brevipes</i> Barsbold, 1981; <i>Harpymimus okladnikovi</i> Barsbold and Perle, 1984; <i>Pelecanimimus polyodon</i> Pérez-Moreno, Sanz, Buscalioni, Moratalla, Ortega and Rasskin-Gutman, 1994. Ornithomimidae Marsh, 1890: <i>Anserimimus planinychus</i> Barsbold, 1988; <i>Archaeornithomimus asiaticus</i> (Gilmoje, 1933); <i>Dromiceiomimus brevitertius</i> (Parks, 1926); <i>Dromiceiomimus samueli</i> (Parks, 1928); <i>Gallimimus bullatus</i> Osmólska, Roniewicz and Barsbold, 1972; <i>Ornithomimus edmontonicus</i> Sternberg, 1933; <i>Ornithomimus velox</i> Marsh, 1890; <i>Struthiomimus altus</i> (Lambe, 1902). <i>Temporal range.</i> ?Hauterivian-Maastrichtian. <i>Occurrence.</i> Nemegt Formation, Omnogov, Mongolia; Baynshiren Svita, Omnogov, Mongolia; Shinekhuduk Svita, Dundgov, Mongolia; Calizas de La Huérguina Formation, Cuenca, Spain; Nemegt Svita, Bayankhongor, Mongolia; Iren Dabasu Formation, Nei Mongol Zizhiqu, China; Horseshoe Canyon Formation, Alberta, Canada; Judith River Formation, Alberta, Canada; Denver Formation, Colorado, USA; Kaiparowits Formation, Utah, USA. <i>Diagnosis.</i> Maxilla excluded from external nares by broad posterior ascending process of the premaxilla (this is a reversal to the ancestral dinosaurian condition, convergently present in <i>Herrerasaurus ischigualastensis',</i> condition unknown in <i>Harpymimus okladnikovi)',</i> humerus long, slender and straight; manual unguals only slightly curved or straight, with reduced, distally placed flexor tubercles; obturator process on ischium is small, triangular and placed entirely on the uppermost fifth of the ischial shaft (unknown in <i>H. okladnikovi</i> and <i>P. polyodon)',</i> pedal unguals ventrally flattened, with a semicircular depression instead of a flexor tubercle. <i>Remarks.</i> Orn ithomimids (Text-fig. 6e) have long been recognized as a monophyletic clade of theropods (e.g. Marsh 1890; Osborn 1916; Russell 1972; Barsbold 1976 <i>Óz</i>; Barsbold and Osmólska 1990). However, the discovery of primitive forms intermediate between o rnithomimids and other theropods during the last 25 years (Barsbold 1981; Barsbold and Perle 1984; Pérez-Moreno <i>et al.</i> 1994) makes a formal diagnosis of this group more problematic, since several characters that were usually used to define o rnithomimids (e.g. Russell 1972) are absent from these more primitive forms or convergently present in other theropods. <i>Deinocheirus mirificus</i> has repeatedly been compared with, or even referred to, the Ornithomimosauria (Ostrom 1972; Gauthier 1986; Paul 1988a), but it was listed as a theropod of uncertain taxonomic position by Norman (1990 <i>a</i>). However, the differences between ornit homimids and <i>Deinocheirus</i> listed by Nicholls and Russell (1985) all represent plesiomorphies in the latter taxon, and might, therefore, only indicate that <i>Deinocheirus</i> is not a member of the most advanced ornithomimosaurs, the ornithomimids. <i>D. mirificus</i> shares with all ornithomimosaurs the apomorphic presence of an especially long, slender and straight humerus, and with all members of this clade which are more derived than <i>Harpymimus</i> the apomorphic characters of the first metacarpal being subequal in length to metacarpal II, and the presence of a reduced, proximally placed, triangular deltopectoral crest on the humerus. Therefore, the taxon is referred to the Ornithomimosauria here. Even after the inclusion of the more primitive members, the monophyly of the o rnithomimo saurs is still well supported by apomorphic characters (see above); therefore, they are treated as a single OTU. The phylogenetic relationships within ornithomimosaurs are probably <i>(Harpymimus (Pelecanimimus,? Deinocheirus (Garudimimus,</i> O rnithomimidae))) (modified from Barsbold and Osmólska 1990).
description: Published as part of <i>Rauhut, Oliver W. M., 2003, The interrelationships and evolution of basal theropod dinosaurs, pp. 1-213 in Special papers in palaeontology 69</i> on pages 38-40, DOI: 10.5281/zenodo.3382576
description: {"references": ["------ 1976 \". A new Late Cretaceous family of small theropods (Oviraptoridae n. fam.) in Mongolia. Doklady Akademii Nauk SSSR, 226, 685 - 688. [In Russian].", "------ 1981. oothless carnivorous dinosaurs of Mongolia. Sovmestnaya Sovyetsko-Mongolskaya Paleontologicheskaya Ekspeditsiya Trudy, 15, 28 - 39. [In Russian].", "------ 1890. Description of new dinosaurian reptiles. American Journal of Science, Series 3, 39, 81 - 86.", "------ 1988. A new late Cretaceous ornithomimid from the Mongolian People's Republic. Paleontologicheski Zhurnal, 1988, 122 - 125. [In Russian].", "PARKS, w. a. 1926. Struthiomimus brevitertius, a new species of dinosaur from the Edmonton Formation of Alberta. Transactions of the Royal Society of Canada, Series 3, 20, 65 - 70.", "LAMBE, L. M. 1902. New genera and species from the Belly River Series (mid-Cretaceous). Contributions to Canadian Palaeontology, Geological Survey of Canada, 3, 25 - 81.", "PEREZ-MORENO, B. P., SANZ, J. L \" BUSCALIONI, A. D \" MORAALLA, J. J., ORTEGA, F. and RASSKIN-GUTMAN, D. 1994. A Unique multitoothed ornithomimosaur dinosaur from the Lower Cretaceous of Spain. Nature, 370, 363 - 367.", "GAUTHIER, J. 1986. Saurischian monophyly and the origin of birds. Memoirs of the Californian Academy of Science, 8, 1 - 55.", "------ 1990. Problematic Theropoda: ' Coelurosaurs'. 280 - 305. In weishampel, d. b., dodson, p. and osmOlska, h. (eds). The Dinosauria. University of California Press, Berkeley, 733 pp.", "------------- and CORIA, r. a. 1990. Camotaurus sastrei Bonaparte, the homed, lightly built camosaur from the Middle Cretaceous of Patagonia. Contributions in Science, 416, 1 - 42.", "------ 1983. Carnivorous dinosaurs from the Cretaceous of Mongolia. Sovmestnaya Sovyetsko-Mongolskaya Paleontologicheskaya Ekspeditsiya Trudy, 19, 1 - 117. [In Russian].", "------ and MARYANSKA,. 1990. Segnosauria. 408 - 415. In weishampel, d. b., dodson, p. and osmOlska, h. (eds). The Dinosauria. University of California Press, Berkeley, 733 pp.", "------ perle, a. and NORELL, M. a. 1994. The skull of Erlicosaurus andrewsi, a Late Cretaceous ' segnosaur' (Theropoda: Therizinosauridae) from Mongolia. American Museum Novitates, 3115, 1 - 39.", "------ kurzanov, s. M. and dong, z. 1990. Camosauria. 169 - 209. In weishampel, d. b., dodson, p. and osmOlska, h. (eds). The Dinosauria. University of California Press, Berkeley, 733 pp."]}