1
40
2
-
Text
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n/a
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Pages
1255-1259
Issue
10
Volume
83
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Middle Eocene Prosimian Primate From The Subathu Group Of Kalakot, Northwestern Himalaya, India
Publisher
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Current Science
Date
A point or period of time associated with an event in the lifecycle of the resource
2002
2002-11
Subject
The topic of the resource
anthropoid primate; china; dentition; myanmar; origin; pakistan; province; Science & Technology - Other Topics; thailand
Creator
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Kumar K; Hamrick M W; Thewissen J G M
Description
An account of the resource
An upper molar tooth of a possibly new but unnamed prosimian primate (Mammalia, Primates) is described from the Middle Eocene, in the uppermost part of the Subathu Group exposed east of Babbian Gala near Kalakot (northwestern Outer Himalaya) in the Rajauri District, Jammu and Kashmir, India. To the best of our knowledge, this is the first pre-Siwalik primate from India and the only primate tooth identified thus far in a remarkably rich and varied land mammal fauna known from the red beds of the Subathu Group. Its occurrence is significant, as the Eocene primates of the Indian subcontinent are important for understanding the early primate radiation in Asia.
Identifier
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n/a
Format
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Journal Article or Conference Abstract Publication
2002
anthropoid primate
China
Current Science
Dentition
Hamrick M W
Journal Article or Conference Abstract Publication
Kumar K
myanmar
origin
Pakistan
province
Science & Technology - Other Topics
Thailand
Thewissen J G M
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1038/417163a" target="_blank" rel="noreferrer noopener">http://doi.org/10.1038/417163a</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
163-166
Issue
6885
Volume
417
Search for Full-text
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
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Vestibular evidence for the evolution of aquatic behaviour in early cetaceans
Publisher
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Nature
Date
A point or period of time associated with an event in the lifecycle of the resource
2002
2002-05
Subject
The topic of the resource
artiodactyls; bony labyrinth; feet; hearing; inner-ear; locomotor evolution; model; origin; petrosal; Science & Technology - Other Topics; whales
Creator
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Spoor F; Bajpal S; Hussaim S T; Kumar K; Thewissen J G M
Description
An account of the resource
Early cetaceans evolved from terrestrial quadrupeds to obligate swimmers, a change that is traditionally studied by functional analysis of the postcranial skeleton(1). Here we assess the evolution of cetacean locomotor behaviour from an independent perspective by looking at the semicircular canal system, one of the main sense organs involved in neural control of locomotion(2). Extant cetaceans are found to be unique in that their canal arc size, corrected for body mass, is approximately three times smaller than in other mammals. This reduces the sensitivity of the canal system, most plausibly to match the fast body rotations that characterize cetacean behaviour. Eocene fossils show that the new sensory regime, incompatible with terrestrial competence, developed quickly and early in cetacean evolution, as soon as the taxa are associated with marine environments. Dedicated agile swimming of cetaceans thus appeared to have originated as a rapid and fundamental shift in locomotion rather than as the gradual transition suggested by postcranial evidence. We hypothesize that the unparalleled modification of the semicircular canal system represented a key 'point of no return' event in early cetacean evolution, leading to full independence from life on land.
Identifier
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<a href="http://doi.org/10.1038/417163a" target="_blank" rel="noreferrer noopener">10.1038/417163a</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2002
artiodactyls
Bajpal S
bony labyrinth
Feet
Hearing
Hussaim S T
inner-ear
Journal Article
Kumar K
locomotor evolution
model
Nature
origin
petrosal
Science & Technology - Other Topics
Spoor F
Thewissen J G M
WHALES