Topic
Ornithomimoides
About: Ornithomimoides is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 76 citations.
Papers
TL;DR: In this article, the authors reviewed the available collection of Cretaceous theropods from Bara Simla housed at the Geological Survey of India, Calcutta, and concluded that all of the theropod elements discovered at the "Carnosaur bed" belong to a single theropoda clade, the Abelisauroidea, but available information is not enough to judge whether they are synonyms.
Abstract: The Late Cretaceous (Maastrichtian) Lameta Formation of central India has yielded dissociated elements of a variety of predatory dinosaurs, most of them coming from a quarry named the "Carnosaur bed." The materials were described by Huene and Matley nearly 70 years ago. They recognized nine theropod species, which they sorted out into the theropod subgroups "Carnosauria" and "Coelurosauria". Huene and Matley also described a considerable amount of theropod hindlimb bones (e.g., femora, tibiae, metatarsals, and pedal phalanges) that they could not refer to any of these species, but vaguely interpreted as corresponding to "allosaurid" or "coelurosaurid" theropods. We reviewed the available collection of Cretaceous theropods from Bara Simla housed at the Geological Survey of India, Calcutta, arriving to the following conclusions: 1) Indosuchus and Indosaurus are abelisaurids, as recognized by previous authors, but available information is not enough to judge whether they are synonyms; 2) Laevisuchus indicus is a small abelisauroid, related to Noasaurus and Masiakasaurus on the basis of their peculiar cervical vertebrae; 3) the controversial taxa " Compsosuchus ", " Dryptosauroides ", " Ornithomimoides ", and " Jubbulpuria " are represented by isolated vertebrae corresponding to different portions of the neck and tail, and also exhibit abelisauroid features; 4) hindlimb bones originally referred to as "allosaurid" and "coelurosaurian" also exhibit abelisauroid characters, and bones of large size are tentatively referred to as corresponding to Indosuchus or Indosaurus , whereas some pedal bones of smaller size may belong to Laevisuchus ; 5) two kinds of abelisaurid feet are apparent: one in which the phalanges of digit III and IV are robust, and another type in which the phalanges of digit IV are transversely narrow and dorsoventrally deep. This review demonstrates that all of the theropod elements discovered at the "Carnosaur bed" belong to a single theropod clade, the Abelisauroidea
66 citations
1 Jan 1998
TL;DR: As the present find constitutes the first record of elongatoolithid eggshells apart from well known Chinese and Mongolian lo calities, comments on possible sauropod-theropod palaeobiology are also discussed.
Abstract: This paper highlights the Cretaceous theropod record in India along with its af finities, and palaeobiologic aspects including description of a new theropod eggshell from the Upper Cretaceous Lameta Formation of Gujarat, India. Recent discoveries and phyloge netic reassessment of various theropod families suggest the presence of the poorly known family Abelisauridae; recent reports confirm the presence of Majungasaurus crenatissimus (DEPRET, 1896), Indosuchus HUENE & MATLEY, 1933 possible Carnotaurus BONAPARTE, 1985 and ?Allosaurus MARSH, 1877. An updated list of various Cretaceous theropod genera in cludes abelisaurids (Indosuchus raptorius HUENE & MATLEY, 1932, Indosaurus matleyi HUENE & MATLEY, 1933, Majungasaurus crenatissimus (DEPRET, 1896) Carnotaurus sp., allo saurids (Compsosuchus solus HUENE, 1932, ?Allosaurus) and coelurosaurs (Jubbulpuria tenuis HUENE & MATLEY, 1933, Laevisuchus indicus HUENE & MATLEY, 1933). Other theropods, such as Ornithomimoides mobilis HUENE & MATLEY, 1933, O. (?)barasim/ensis HUENE & MAT LEY, 1933 and Dryptosauroidesgrandis HUENE, 1932 regarded as indeterminate, need further assessment for proper affiliation. In the ongoing discussion, we however, present signifi cant new data on the first ever report of dinosaur eggshell material referable to a new ooge nus and oospecies Ellipsoolithus khedaensis, (oofamily Elongatoolithidae) from near Rahioli, district Kheda, Gujarat. This material has been presently assigned to the Theropoda and can be easily differentiated from the other well known megaloolithid oospecies (broadly referable to Sauropoda due to associated titanosaurid bones; known from Madhya Pradesh, Gujarat, Maharashtra and Ariyalur in South India) on the basis of megascopic, microscopic and ultrastructural characteristics. Megascopically, the eggshell shape varies from elon gated ellipsoid, having an elongation ratio range of 1.5 to 1.7. The eggshell thickness is 1.2- 1.6 mm and the mammillary layer is 1/4-1/7 of the total thickness. At the microstructural level, an angusticanaliculate pore system is observed. As the present find constitutes the first record of elongatoolithid eggshells apart from well known Chinese and Mongolian lo calities, comments on possible sauropod-theropod palaeobiology are also discussed.
23 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2004 | 1 |
| 1998 | 1 |