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Anthracobunids from the middle eocene of India and pakistan are stem perissodactyls.

Anthracobunidae is an Eocene family of large mammals from south Asia that is commonly considered to be part of the radiation that gave rise to elephants (proboscideans) and sea cows (sirenians). We describe a new collection of anthracobunid fossils…

Tags: *Fossils, 2014, Animals, Bajpai Sunil, Clementz Mark, Cooper Lisa Noelle, Department of Anatomy & Neurobiology, Dugong, Elephants, Hussain S Taseer, India, Madar Sandra I, NEOMED College of Medicine, Pakistan, PloS one, Seiffert Erik R, Thewissen J G M

Aquatic Habits of Cetacean Ancestors: Integrating Bone Microanatomy and Stable Isotopes.

The earliest cetaceans were interpreted as semi-aquatic based on the presence of thickened bones and stable oxygen isotopes in tooth enamel. However, the origin of aquatic behaviors in cetacean relatives (e.g., raoellids, anthracotheres) remains…

Tags: *Ecosystem, 2016, Animals, Bajpai Sunil, Bone and Bones/anatomy & histology/metabolism, Cetacea/*physiology, Clementz Mark T, Cooper Lisa Noelle, Department of Anatomy & Neurobiology, Hieronymus Tobin L, Hussain S Taseer, Integrative and comparative biology, Isotope Labeling, Isotopes/metabolism, NEOMED College of Medicine, Usip Sharon

Development and evolution of the unique cetacean dentition.

The evolutionary success of mammals is rooted in their high metabolic rate. A high metabolic rate is sustainable thanks to efficient food processing and that in turn is facilitated by precise occlusion of the teeth and the acquisition of rhythmic…

Tags: 2013, Armfield Brooke A, Bajpai Sunil, Cetacea, Cetacean, Department of Anatomy & Neurobiology, Evo-devo, NEOMED College of Medicine, Paleontology, PeerJ, Teeth, Thewissen J G M, Vinyard Christopher J, Zheng Zhengui

Eocene evolution of whale hearing.

The origin of whales (order Cetacea) is one of the best-documented examples of macroevolutionary change in vertebrates. As the earliest whales became obligately marine, all of their organ systems adapted to the new environment. The fossil record…

First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India.

Hominoid remains from Miocene deposits in India and Pakistan have played a pivotal role in understanding the evolution of great apes and humans since they were first described in the 19th Century. We describe here a hominoid maxillary fragment…

Tags: 2018, Bajpai Sunil, Bhandari Ansuya, Department of Anatomy & Neurobiology, Hieronymus Tobin, Kay Richard F, NEOMED College of Medicine, PloS one, Tiwari Brahma Nand, Williams Blythe A

First record of the Miocene hominoid Sivapithecus from Kutch, Gujarat state, western India.

Hominoid remains from Miocene deposits in India and Pakistan have played a pivotal role in understanding the evolution of great apes and humans since they were first described in the 19th Century. We describe here a hominoid maxillary fragment…

Tags: *Archaeology, *Hominidae/anatomy & histology, 2018, Animals, Bajpai Sunil, Bhandari Ansuya, Biological Evolution, Geology, Hieronymus Tobin L, India, Kay Richard F, PloS one, Tiwari Brahma Nand, Williams Blythe A

Sound transmission in archaic and modern whales: anatomical adaptations for underwater hearing.

The whale ear, initially designed for hearing in air, became adapted for hearing underwater in less than ten million years of evolution. This study describes the evolution of underwater hearing in cetaceans, focusing on changes in sound transmission…

Thewissen et al. reply.

Replying to: J. H. Geisler & J. M. Theodor 458, 10.1038/nature07776 (2009)The analysis of Geisler and Theodor confirms our main phylogenetic result, that raoellids are, or include, the sister group to cetaceans. Their study expands on our findings by…

Tags: 2009, Bajpai Sunil, Clementz Mark T, Cooper Lisa Noelle, Department of Anatomy & Neurobiology, LETTERS to the editor, Nature, NEOMED College of Medicine, Thewissen J G M, Tiwari B N, WHALES

Whales originated from aquatic artiodactyls in the Eocene epoch of India.

Although the first ten million years of whale evolution are documented by a remarkable series of fossil skeletons, the link to the ancestor of cetaceans has been missing. It was known that whales are related to even-toed ungulates (artiodactyls), but…

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