Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Dentary"”.
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Taxonomic and palaeobiological assessment of the South African mosasaurids
… and postorbitofrontals (SAM-PK-5265); two dentary fragments (SAM-PK-5265) assigned to ‘Tylosaurus capensis' by Broom in 1912 (SAM-PK-5265); an undescribed muzzle unit and associated isolated teeth (CGP/1/2265) from Pondoland and a more recently discovered isolated partial vertebra from St …
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A Serra dos Órgãos como barreira biogeográfica para peixes dos gêneros Astyanax Baird e Girard (1854) e Deuterodon Eigenmann (1907) (Teleostei : Characiformes : Characidae)
… A. scabripinnis (Jenyns, 1842) by the shape of dentary teeth, which heigh variates abruptally from the fifth tooth. Dentary tooth heigh from A. scabripinnis variates abuptly from the fourth teeth. Astyanax giton, A. intermedius and A. parahybae have their lectotypes designed. Two new species …
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Revisão taxonômica e filogenia do gênero Micropoecilia Hubbs (Cyprinodontiformes: Poeciliidae)
… 13 synapomorphic features: lateral projection of dentary absent; longitudinaly elongated vomer; non-elongated posterior portion of dorsal arch; reduced second pharyngobranchial dentition; process on the anterior border of first hypobranchial present; latero-posterior process of fifth …
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Contribuição ao estudo do crânio de Placosoma Tschudi, 1847 (Sauria: Teiidae: Gymnophthalminae)
… the shape and number of teeth on the maxilla and dentary, among others, are emphasized.
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Phylogeny of <em>Panthera</em>, Including <em>P. atrox</em>, Based on Cranialmandibular Characters
… morphologic characters from the skull and dentary were analyzed within <em>Panthera</em> (including all extant and one extinct taxa) to gain a better understanding of pantherine phylogeny. Multiple specimens of each taxon were analyzed, including: <em>P. leo, P. tigris, P. onca, P. pardus , …
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Identifying Myotis Species Using Geometric Morphometrics and its Implications for the Fossil Record and Conservation
… evidence of convergence in the morphology of the dentary among <em>Myotis </em>species that feed primarily by gleaning. When analyzed together there was no evidence of sexual dimorphism among the 6 eastern U.S. <em>Myotis</em>, but when analyzed individually some dimorphism may be present. A …
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The evolutionary transition from reptiles to mammals: analyses of body size reduction and separation of middle ear elements from the jaw
… none more dramatic than the conversion of postdentary elements from the reptilian jaw into the middle ear of mammals. Reptiles and early synapsids possess multiple bones in the jaw but only a single bone in the middle ear, the columella (stapes). Additionally, they conduct jaw abduction via a …
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Relações filogenéticas entre os táxons basais da família Trichomycteridae (Siluriformes : Loricarioidea)
… hypohyal elongate; posterior extremity of the dentary truncate; 11-13 pectoral-fin rays; presence of a laminar process on the external portion of the cleithrum; elongate process on internal portion of the cleithrum angular; well developed lateral ethmoid; Weber complex weakly ankylosed to …
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Diet and Feeding-Related Morphometrics of the Blackstripe Topminnow, <i>Fundulus notatus</i>, in Allotropic and Syntopic Populations with the Blackspotted Topminnow, <i>Fundulus olivaceus</i>
… gape width, gape height, maxillary length, and dentary length). Morphometric analyses were conducted to determine if there were ontogenetic shifts or sexual dimorphisms in allotopic and syntopic populations. Analyses were also conducted to determine if there were differences among species and …
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Descrição osteológica do crânio de um novo dinossauro Prosauropoda do Neotriássico do sul do Brasil
… this clade supported by two characters which was dentary anterior end in ventral orientation and deep transverse septum between basipterygoid processes. The few numbers of known forms, associated with the importance of the basal dinosaurs as precursors of the great variety reached by the group …
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Comprehensive description of a skeleton of Endothiodon Bathystoma (Anomodontia, Therapsida), a dicynodont from the Late Permian of the Karoo Basin of South Africa
… by rows of internal teeth on the premaxilla and dentary arranged in replacement waves called Zahnreihen; longitudinal ridges running from the premaxilla to the pineal crest; and a prominent pineal boss with a pineal foramen. Endothiodon is well-represented by cranial and postcranial material in …
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Systematic revision of the South American armored catfish genus Loricaria (Siluriformes: Loricariidae)
… and absence of buccal papillae surrounding the dentary teeth. Loricaria are small to moderate-sized catfishes widely distributed throughout most of the major river drainages of cis-Andean South America, including the Amazon, Orinoco, Paraguay, Paraná, and smaller coastal rivers draining the …
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Distribution, Age, and Growth, and Feeding Ecology of Paddlefish (Polyodon spathula) In Unaltered Missouri River, South Dakota
… and non-flowing tributaries. Halo-like bands in dentary bone cross sections may be produced as a result of the food habits of paddlefish. The eye to fork length was a more valid index of paddlefish growth than total length or fork length. Factors to allow conversion of total length and fork …
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Chapter 1, a dichotomous key for the identification of nine salmonids of the Inland Northwest using six diagnostic skull bones; and associated equations to estimate total length and weight form bones ingested by piscivores or found in archeological sites; Chapter 2, Utilization of acoustic biotelemetry to define the movements of Lake Roosevelt Redband trout, oncorhynchus mykiss gairdneri
… Of the eight bones, the premaxillary, maxillary, dentary, cleithra, preopercle and opercle displayed species specific qualities for all nine species. These unique qualities have been used to construct a dichotomous key. The remaining two bones, the pharyngeal arch and vertebra, were not different …
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Understanding Patterns of Phenotypic Variation in a Contemporary Population and Ancient Lineage of Fishes
… that the morphology of scales and jaw bones–the dentary and premaxillary–did not overlap with the morphological variation of these components in extant polypterids. Thus, while extant polypterids may indeed exhibit some ancestral characters, they fail the first direct test of morphological …