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The Stratigraphic, Palaeobiogeographic and Phylogenetic Significance of <i>Aquilapollenites</i>

Open Journal of Geology 2019年第10期9卷 597-600页

作者： Shreya Mishra shiva prakash kadukothanahalli nagaraju Mahi Bansal Vandana Prasad Terminal Cretaceous-Cenozoic Ecosystem Laboratory Birbal Sahni Institute of Palaeosciences Lucknow India Centre for Structural and Functional Genomics Biology Department Concordia University Montreal Canada The Nature Conservancy Centre India New Delhi Delhi India

Angiosperm evolved and diversified during Cretaceous. During this course of evolution and radiation, various pollen of uncertain origin had evolved. Aquilapollenites represents the early stock of angiosperms attaining its acme with respect to diversity and dominance during Campanian and Maastrichtian age. It was globally present (except Antarctica) however more dominant in northern hemisphere (Canada, North America, Sakhlain Oblast and China). In India, the Aquilapollenites sp. is present in Maastrichtian aged deposits. The pollen affinity has been associated with Loranthaceae and Santalaceae plant families. Here, a comparative description of all the Aquilapollenites sp. comprising a wide range of morphological diversity has been discussed. The wider morphological diversity and ecological adaptability of Aquilapollenites sp. infer that it is globally significant and warrants a more detailed study.

关键词： Triprojectate Pollens Late Cretaceous Maastrichtian Paleocene

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Sexual Dimorphism of Foramen Magnum between Two Different Groups of Indian Population: A Cross‑Sectional Cone‑Beam Computed Tomography Study

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Journal of Forensic Science and Medicine 2018年第3期4卷 150-155页

作者： Vidisha Gargi Ravi prakash SM Sangeeta Malik nagaraju K Sumit Goel Swati Gupta Department of Oral Medicine and Radiology Subharti Dental CollegeMeerutUttar PradeshIndia

The foramen magnum (FM), being a vital landmark at the base of the skull, includes interests to many fields of medicine. Many authors haverecounted the usefulness of the FM in gender determination. The emphasis of this study is to evaluate the shape and dimensions of the FM among males and females and to establish its role in sexual dimorphism using cone-beam computed tomography (CBCT). Furthermore, to evaluate the area and FM index (FMI) among males and females and finally to evaluate the differences in FM measurements if any in twodifferent regions of an Indian population. One hundred and ten CBCT scans (55 males and 55 females;age range, 20–80 years) were selectedfor this study. The sagittal diameter, transverse diameter, area, FMI, and circumference of FM were measured, and data were subjected to discriminant analysis for the evaluation of sexual dimorphism. The area of FM was the best discriminant parameter which was used to study the sexual dimorphism with an overall accuracy of 90.9%. It can be concluded that the reconstructed CBCT image provides valuable measurements for the FM and could be used for gender determination.

关键词： Craniometry dimorphism foramen magnum

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