1
40
10
-
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/10.1002/ar.24326" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/ar.24326</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).
ISSN
1932-8494
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<a href="http://ezproxy.neomed.idm.oclc.org/login?url=http://doi.org/10.1002/ar.24326" target="_blank" rel="noreferrer noopener">NEOMED Full-text Holding (if available) - Proxy DOI: 10.1002/ar.24326</a>
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Update Year & Number
January 2020 Update
NEOMED College
NEOMED College of Medicine
NEOMED Department
Department of Anatomy & Neurobiology
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
Comparative dental anatomy in newborn primates: Cusp mineralization
Publisher
An entity responsible for making the resource available
Anatomical Record (Hoboken, N.J.: 2007)
Date
A point or period of time associated with an event in the lifecycle of the resource
2019
2019-12-04
Subject
The topic of the resource
catarrhine; deciduous; dentition; platyrrhine
Creator
An entity primarily responsible for making the resource
Paddock Kelsey; Zeigler Larissa; Harvey Brianna; Prufrock Kristen A; Liptak Jordan M; Ficorilli Courtney M; Hogg Russell T; Bonar Christopher J; Evans Sian; Williams Lawrence; Vinyard Christopher J; DeLeon Valerie B; Smith Timothy D
Description
An account of the resource
Previous descriptive work on deciduous dentition of primates has focused disproportionately on great apes and humans. To address this bias in the literature, we studied 131 subadult nonhominoid specimens (including 110 newborns) describing deciduous tooth morphology and assessing maximum hydroxyapatite density (MHD). All specimens were CT scanned at 70 kVp and reconstructed at 20.5-39 μm voxels. Grayscale intensity from scans was converted to hydroxyapatite (HA) density (mg HA/cm3 ) using a linear conversion of grayscale values to calibration standards of known HA density (R2 = .99). Using Amira software, mineralized dental tissues were captured by segmenting the tooth cusps first and then capturing the remainder of the teeth at descending thresholds of gray levels. We assessed the relationship of MHD of selected teeth to cranial length using Pearson correlation coefficients. In monkeys, anterior teeth are more mineralized than postcanine teeth. In tarsiers and most lemurs and lorises, postcanine teeth are the most highly mineralized. This suggests that monkeys have a more prolonged process of dental mineralization that begins with incisors and canines, while mineralization of postcanine teeth is delayed. This may in part be a result of relatively late weaning in most anthropoid primates. Results also reveal that in lemurs and lorises, MHD of the mandibular first permanent molar (M1 ) negatively correlates with cranial length. In contrast, the MHD of M1 positively correlates with cranial length in monkeys. This supports the hypothesis that natural selection acts independently on dental growth as opposed to mineralization and indicates clear phylogenetic differences among primates.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1002/ar.24326" target="_blank" rel="noreferrer noopener">10.1002/ar.24326</a>
PMID: 31802627
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2019
Anatomical Record (Hoboken
Anatomical Record (Hoboken, N.J.: 2007)
Bonar Christopher J
catarrhine
deciduous
DeLeon Valerie B
Dentition
Department of Anatomy & Neurobiology
Evans Sian
Ficorilli Courtney M
Harvey Brianna
Hogg Russell T
January 2020 Update
Journal Article
Liptak Jordan M
N.J.: 2007)
NEOMED College of Medicine
Paddock Kelsey
platyrrhine
Prufrock Kristen A
Smith Timothy D
Vinyard Christopher J
Williams Lawrence
Zeigler Larissa
-
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
n/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
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
An entity responsible for making the resource available
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
An entity primarily responsible for making the resource
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
An unambiguous reference to the resource within a given context
n/a
Format
The file format, physical medium, or dimensions of the resource
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/10.1006/jhev.2001.0504" target="_blank" rel="noreferrer noopener">http://doi.org/10.1006/jhev.2001.0504</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
39-62
Issue
1
Volume
42
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Dublin Core
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Title
A name given to the resource
Dental Remains Of Equatorius Africanus From Kipsaramon, Tugen Hills, Baringo District, Kenya
Publisher
An entity responsible for making the resource available
Journal of Human Evolution
Date
A point or period of time associated with an event in the lifecycle of the resource
2002
2002-01
Subject
The topic of the resource
Anthropology; baringo; dentition; Equatorius; evolution; Evolutionary Biology; hominoid genus; hominoids; kenyapithecus; Kipsaramon; middle miocene; Miocene; Muruyur; pasalar; sexual dimorphism; western kenya
Creator
An entity primarily responsible for making the resource
Kelley J; Ward S; Brown B; Hill A; Duren D L
Description
An account of the resource
Forty-one isolated large hominoid teeth, as well as most of the mandibular and three maxillary teeth associated with a partial skeleton, were recovered from middle Miocene Muruyur sediments near Kipsaramon in the Tugen Hills, Baringo District, Kenya. The isolated teeth were collected as surface finds and the skeleton was excavated in situ at locality BPRP#122 dated between 15(.)58 Ma and 15(.)36 Ma. The majority of the teeth recovered at BPRP#122 are referable to a minimum of five individuals of the hominoid Equatorius africanus. Three of the teeth, however, are provisionally assigned to Nyanzapithecus sp. The new hominoids from Kipsaramon add to an increasing inventory of specimens that suggest greater large hominoid taxonomic diversity from the middle Miocene of Kenya than was previously recognized. It is suggested that there are two large-bodied hominoid species present at Mabako, only one of which is assignable to Equatorius. (C) 2002 Academic Press.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1006/jhev.2001.0504" target="_blank" rel="noreferrer noopener">10.1006/jhev.2001.0504</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article or Conference Abstract Publication
2002
Anthropology
baringo
Brown B
Dentition
Duren D L
Equatorius
Evolution
Evolutionary Biology
Hill A
hominoid genus
hominoids
Journal Article or Conference Abstract Publication
Journal of human evolution
Kelley J
kenyapithecus
Kipsaramon
Middle Miocene
miocene
Muruyur
pasalar
sexual dimorphism
Ward S
western kenya
-
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/10.1006/jhev.1995.1039" target="_blank" rel="noreferrer noopener">http://doi.org/10.1006/jhev.1995.1039</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
503-517
Issue
6
Volume
28
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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
The Anterior Dentition Of Sivapithecus-parvada, With Comments On The Phylogenetic Significance Of Incisor Heteromorphy In Hominoidea
Publisher
An entity responsible for making the resource available
Journal of Human Evolution
Date
A point or period of time associated with an event in the lifecycle of the resource
1995
1995-06
Subject
The topic of the resource
Anthropology; clade; dentition; east-africa; evolution; Evolutionary Biology; hominids; hominoid phylogenetics; incisors; kenya; middle miocene; miocene hominoid; orangutan; origin; pakistan; pongo; sivapithecus; specimens
Creator
An entity primarily responsible for making the resource
Kelley J; Anwar M; McCollum M A; Ward S C
Description
An account of the resource
A premaxillary fragment of Sivapithecus parvada preserving the germs of the right central and lateral incisors is described. The specimen was recovered in situ during excavation at locality Y311 in the upper Nagri Formation (ca. 9.2 m.y.a.) of the Siwalik Sequence, Potwar Plateau, Pakistan. The central incisor is approximately 35% larger than the next largest Sivapithecus incisor, in keeping with the very large size of S. parvada compared to other Sivapithecus species, and is exceptionally long mesiodistally in relation to its breadth. It is also morphologically distinct, having a sharply angled distal margin and a distinct lingual tubercle. However, previous descriptions of Sivapithecus upper central incisors as having a continuous lingual shelf are in some cases erroneous and ignore the morphological variation present in the sample. In several features of anterior tooth size, morphology and proportionality, S. parvada resembles Pongo more than do other species of Sivapithecus. The I1/I2 length ratio of the new specimen is 2.12, the largest size disparity reported for any fossil catarrhine, and greater than any single value in a large sample of Pongo pygmaeus. Very great size disparity between upper central and lateral incisors is widely considered to be a synapomorphy of the orang-utan lineage. We conclude, however, that descriptions of upper incisor size heteromorphy in Pongo have in general been exaggerated and have failed to recognize substantial differences in this character between Bornean and Sumatran orang-utans. We further conclude, based on examination of a variety of Miocene hominoids and other Miocene catarrhine primates, that the character of I1/I2 proportionality has little if any phylogenetic utility within Hominoidea.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1006/jhev.1995.1039" target="_blank" rel="noreferrer noopener">10.1006/jhev.1995.1039</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article or Conference Abstract Publication
1995
Anthropology
Anwar M
clade
Dentition
east-africa
Evolution
Evolutionary Biology
hominids
hominoid phylogenetics
incisors
Journal Article or Conference Abstract Publication
Journal of human evolution
Kelley J
Kenya
McCollum M A
Middle Miocene
miocene hominoid
orangutan
origin
Pakistan
pongo
sivapithecus
specimens
Ward S C
-
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/10.1002/ajpa.20290" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/ajpa.20290</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
215-224
Issue
2
Volume
129
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Dublin Core
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Title
A name given to the resource
Phase II jaw movements and masseter muscle activity during chewing in Papio anubis
Publisher
An entity responsible for making the resource available
American Journal of Physical Anthropology
Date
A point or period of time associated with an event in the lifecycle of the resource
2006
2006-02
Subject
The topic of the resource
adaptations; Anthropology; bone strain; dentition; emg; evolution; Evolutionary Biology; jaw muscles; loading patterns; macaca-fascicularis; macaques; mastication; power stroke; primates; teeth
Creator
An entity primarily responsible for making the resource
Wall C E; Vinyard C J; Johnson K R; Williams S H; Hylander W L
Description
An account of the resource
It was proposed that the power stroke in primates has two distinct periods of occlusal contact, each with a characteristic motion of the mandibular molars relative to the maxillary molars. The two movements are called phase I and phase IT, and they occur sequentially in that order (Kay and Hiiemae [1974] Am J. Phys. Anthropol. 40:227-256, Kay and Hiiemae [1974] Prosimian Biology, Pittsburgh: University of Pittsburgh Press, p. 501-530). Phase I movement is said to be associated with shearing along a series of crests, producing planar phase I facets and crushing on surfaces on the basins of the molars. Phase I terminates in centric occlusion. Phase II movement is said to be associated with grinding along the same surfaces that were used for crushing at the termination of phase I. Hylander et al. ([1987] Am J. Phys. Anthropol. 72:287-312; see also Hiiemae [1984] Food Acquisition and Processing, London: Academic Press, p. 257-281; Hylander and Crompton [1980] Am J. Phys. Anthropol. 52:239-251, [1986] Arch. Oral. Biol. 31:841-848) analyzed data on macaques and suggested that phase IT movement may not be nearly as significant for food breakdown as phase I movement simply because, based on the magnitude of mandibular bone strain patterns, adductor muscle and occlusal forces are likely negligible during movement out of centric occlusion. Our goal is to better understand the functional significance of phase IT movement within the broader context of masticatory kinematics during the power stroke. We analyze vertical and transverse mandibular motion and relative activity of the masseter and temporalis muscles during phase I and II movements in Papio anubis. We test whether significant muscle activity and, by inference, occlusal force occurs during phase IT movement. We find that during phase IT movement, there is negligible force developed in the superficial and deep masseter and the anterior and posterior temporalis muscles. Furthermore, mandibular movements are small during phase II compared to phase I. These results suggest that grinding during phase IT movement is of minimal importance for food breakdown, and that most food breakdown on phase IT facets occurs primarily at the end of phase I movement (i.e., crushing during phase I movement). We note, however, that depending on the orientation of phase I facets, significant grinding also occurs along phase I facets during phase I. (c) 2005 Wiley-Liss, Inc.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1002/ajpa.20290" target="_blank" rel="noreferrer noopener">10.1002/ajpa.20290</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2006
adaptations
American journal of physical anthropology
Anthropology
bone strain
Dentition
emg
Evolution
Evolutionary Biology
Hylander W L
jaw muscles
Johnson K R
Journal Article
loading patterns
macaca-fascicularis
macaques
Mastication
power stroke
Primates
Teeth
Vinyard C J
Wall C E
Williams S H
-
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/10.1578/am.44.6.2018.591" target="_blank" rel="noreferrer noopener">http://doi.org/10.1578/am.44.6.2018.591</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
591-602
Issue
6
Volume
44
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Dublin Core
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Title
A name given to the resource
Highlights of Cetacean Embryology
Publisher
An entity responsible for making the resource available
Aquatic Mammals
Date
A point or period of time associated with an event in the lifecycle of the resource
2018
2018
Subject
The topic of the resource
Balacnidae; Balaena mysticetus; baleen development; bowhead whale; Delphinidae; dentition; development; dolphin stenella-attenuata; ear development; embryology; evolution; generation; hair; hyperphalangy; limb; Marine & Freshwater Biology; morphogenesis; perspectives; pharyngeal arch; Stenella attenuata; teeth; tooth development; Zoology
Creator
An entity primarily responsible for making the resource
Thewissen J G M
Description
An account of the resource
The embryology of cetaceans documents features that elucidate the interaction between form and function in modern species, as well as their evolution from extinct ones. Prenatal specimens of the dolphin Stenella attenuata demonstrate critical aspects of the embryonic and fetal development of cetaceans, the pharyngeal arches, ear ossicles, nasal opening, teeth, forelimb, hind limb, and flukes. In addition, specimens of the bowhead whale (Balaena mysticetus) illustrate the development of baleen and hair.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1578/am.44.6.2018.591" target="_blank" rel="noreferrer noopener">10.1578/am.44.6.2018.591</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2018
Aquatic Mammals
Balacnidae
Balaena mysticetus
baleen development
bowhead whale
DELPHINIDAE
Dentition
development
dolphin stenella-attenuata
ear development
embryology
Evolution
generation
hair
hyperphalangy
Journal Article
limb
Marine & Freshwater Biology
Morphogenesis
perspectives
pharyngeal arch
Stenella attenuata
Teeth
Thewissen J G M
tooth development
Zoology
-
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/10.1111/j.1525-142X.2005.05048.x" target="_blank" rel="noreferrer noopener">http://doi.org/10.1111/j.1525-142X.2005.05048.x</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
440-457
Issue
5
Volume
7
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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
Morphoregulation of teeth: modulating the number, size, shape and differentiation by tuning Bmp activity
Publisher
An entity responsible for making the resource available
Evolution & Development
Date
A point or period of time associated with an event in the lifecycle of the resource
2005
2005-09
Subject
The topic of the resource
ameloblast; Bone morphogenetic protein-2; dentition; Developmental Biology; differentiation; early tooth development; enamel knot; Evolutionary Biology; Genetics & Heredity; homeobox genes; in-vitro; missense mutation; molar teeth; murine; signaling pathways
Creator
An entity primarily responsible for making the resource
Plikus M V; Zeichner-David M; Mayer J A; Reyna J; Bringas P; Thewissen J G M; Snead M L; Chai Y; Chuong C M
Description
An account of the resource
During development and evolution, the morphology of ectodermal organs can be modulated so that an organism can adapt to different environments. We have proposed that morphoregulation can be achieved by simply tilting the balance of molecular activity. We test the principles by analyzing the effects of partial downregulation of Bmp signaling in oral and dental epithelia of the keratin 14-Noggin transgenic mouse. We observed a wide spectrum of tooth phenotypes. The dental formula changed from 1.0.0.3/1.0.0.3 to 1.0.0.2(1)/1.0.0.0. All mandibular and M3 maxillary molars were selectively lost because of the developmental block at the early bud stage. First and second maxillary molars were reduced in size, exhibited altered crown patterns, and failed to form multiple roots. In these mice, incisors were not transformed into molars. Histogenesis and differentiation of ameloblasts and odontoblasts in molars and incisors were abnormal. Lack of enamel caused misocclusion of incisors, leading to deformation and enlargement in size. Therefore, subtle differences in the level, distribution, and timing of signaling molecules can have major morphoregulatory consequences. Modulation of Bmp signaling exemplifies morphoregulation hypothesis: simple alteration of key signaling pathways can be used to transform a prototypical conical-shaped tooth into one with complex morphology. The involvement of related pathways and the implication of morphoregulation in tooth evolution are discussed.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1111/j.1525-142X.2005.05048.x" target="_blank" rel="noreferrer noopener">10.1111/j.1525-142X.2005.05048.x</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2005
ameloblast
Bone morphogenetic protein-2
Bringas P
Chai Y
Chuong C M
Dentition
Developmental Biology
differentiation
early tooth development
enamel knot
Evolution & Development
Evolutionary Biology
Genetics & Heredity
homeobox genes
in-vitro
Journal Article
Mayer J A
missense mutation
molar teeth
murine
Plikus M V
Reyna J
signaling pathways
Snead M L
Thewissen J G M
Zeichner-David 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/10.1126/science.285.5432.1382" target="_blank" rel="noreferrer noopener">http://doi.org/10.1126/science.285.5432.1382</a>
Pages
1382–1386
Issue
5432
Volume
285
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
Equatorius: a new hominoid genus from the Middle Miocene of Kenya.
Publisher
An entity responsible for making the resource available
Science (New York, N.Y.)
Date
A point or period of time associated with an event in the lifecycle of the resource
1999
1999-08
Subject
The topic of the resource
*Fossils; Ancient; Animals; Bone and Bones/anatomy & histology; Dentition; History; Hominidae/anatomy & histology/*classification; Humans; Kenya; Mandible/anatomy & histology; Paleodontology; Skeleton; Terminology as Topic; Tooth/anatomy & histology
Creator
An entity primarily responsible for making the resource
Ward S; Brown B; Hill A; Kelley J; Downs W
Description
An account of the resource
A partial hominoid skeleton just older than 15 million years from sediments in the Tugen Hills of north central Kenya mandates a revision of the hominoid genus Kenyapithecus, a possible early member of the great ape-human clade. The Tugen Hills specimen represents a new genus, which also incorporates all material previously referable to Kenyapithecus africanus. The new taxon is derived with respect to earlier Miocene hominoids but is primitive with respect to the younger species Kenyapithecus wickeri and therefore is a late member of the stem hominoid radiation in the East African Miocene.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1126/science.285.5432.1382" target="_blank" rel="noreferrer noopener">10.1126/science.285.5432.1382</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Fossils
1999
Ancient
Animals
Bone and Bones/anatomy & histology
Brown B
Dentition
Downs W
Hill A
History
Hominidae/anatomy & histology/*classification
Humans
Kelley J
Kenya
Mandible/anatomy & histology
Paleodontology
Science (New York, N.Y.)
Skeleton
Terminology as Topic
Tooth/anatomy & histology
Ward S
-
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/10.1111/joa.12579" target="_blank" rel="noreferrer noopener">http://doi.org/10.1111/joa.12579</a>
Pages
549–566
Issue
4
Volume
230
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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Evolutionary aspects of the development of teeth and baleen in the bowhead whale.
Publisher
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Journal of anatomy
Date
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2017
2017-04
Subject
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*Biological Evolution; Animals; baleen; baleen whales; bowhead whale; Bowhead Whale/anatomy & histology/*embryology; Cetacea; Dentition; embryology; Female; FGF; Jaw/anatomy & histology/embryology; keratin; Mixed; Mouth/anatomy & histology/*embryology; mysticetes; ontogeny; Pregnancy; tooth development; Tooth/anatomy & histology/*embryology
Creator
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Thewissen J G M; Hieronymus Tobin L; George John C; Suydam Robert; Stimmelmayr Raphaela; McBurney Denise
Description
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In utero, baleen whales initiate the development of several dozens of teeth in upper and lower jaws. These tooth germs reach the bell stage and are sometimes mineralized, but toward the end of prenatal life they are resorbed and no trace remains after birth. Around the time that the germs disappear, the keratinous baleen plates start to form in the upper jaw, and these form the food-collecting mechanism. Baleen whale ancestors had two generations of teeth and never developed baleen, and the prenatal teeth of modern fetuses are usually interpreted as an evolutionary leftover. We investigated the development of teeth and baleen in bowhead whale fetuses using histological and immunohistochemical evidence. We found that upper and lower dentition initially follow similar developmental pathways. As development proceeds, upper and lower tooth germs diverge developmentally. Lower tooth germs differ along the length of the jaw, reminiscent of a heterodont dentition of cetacean ancestors, and lingual processes of the dental lamina represent initiation of tooth bud formation of replacement teeth. Upper tooth germs remain homodont and there is no evidence of a secondary dentition. After these germs disappear, the oral epithelium thickens to form the baleen plates, and the protein FGF-4 displays a signaling pattern reminiscent of baleen plates. In laboratory mammals, FGF-4 is not involved in the formation of hair or palatal rugae, but it is involved in tooth development. This leads us to propose that the signaling cascade that forms teeth in most mammals has been exapted to be involved in baleen plate ontogeny in mysticetes.
Identifier
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<a href="http://doi.org/10.1111/joa.12579" target="_blank" rel="noreferrer noopener">10.1111/joa.12579</a>
Rights
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Biological Evolution
2017
Animals
baleen
baleen whales
bowhead whale
Bowhead Whale/anatomy & histology/*embryology
Cetacea
Dentition
Department of Anatomy & Neurobiology
embryology
Female
FGF
George John C
Hieronymus Tobin L
Jaw/anatomy & histology/embryology
Journal of anatomy
keratin
McBurney Denise
Mixed
Mouth/anatomy & histology/*embryology
mysticetes
NEOMED College of Medicine
ontogeny
Pregnancy
Stimmelmayr Raphaela
Suydam Robert
Thewissen J G M
tooth development
Tooth/anatomy & histology/*embryology
-
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/10.1002/ar.23273" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/ar.23273</a>
Pages
2098–2131
Issue
12
Volume
298
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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Dental maturation, eruption, and gingival emergence in the upper jaw of newborn primates.
Publisher
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Anatomical record (Hoboken, N.J. : 2007)
Date
A point or period of time associated with an event in the lifecycle of the resource
2015
2015-12
Subject
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*Tooth Eruption/physiology; Animals; anthropoid; Dentition; development; Gingiva/*anatomy & histology/*growth & development; haplorhine; Jaw/*anatomy & histology/physiology; Newborn; Odontogenesis/physiology; Permanent; Primates/*anatomy & histology/*growth & development; Species Specificity; strepsirrhine; Tarsius; teeth
Creator
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Smith Timothy D; Muchlinski Magdalena N; Jankord Kathryn D; Progar Abbigal J; Bonar Christopher J; Evans Sian; Williams Lawrence; Vinyard Christopher J; DeLeon Valerie B
Description
An account of the resource
In this report we provide data on dental eruption and tooth germ maturation at birth in a large sample constituting the broadest array of non-human primates studied to date. Over 100 perinatal primates, obtained from natural captive deaths, were screened for characteristics indicating premature birth, and were subsequently studied using a combination of histology and micro-CT. Results reveal one probable unifying characteristic of living primates: relatively advanced maturation of deciduous teeth and M1 at birth. Beyond this, there is great diversity in the status of tooth eruption and maturation (dental stage) in the newborn primate. Contrasting strategies in producing a masticatory battery are already apparent at birth in strepsirrhines and anthropoids. Results show that dental maturation and eruption schedules are potentially independently co-opted as different strategies for attaining feeding independence. The most common strategy in strepsirrhines is accelerating eruption and the maturation of the permanent dentition, including replacement teeth. Anthropoids, with only few exceptions, accelerate mineralization of the deciduous teeth, while delaying development of all permanent teeth except M1. These results also show that no living primate resembles the altricial tree shrew (Tupaia) in dental development. Our preliminary observations suggest that ecological explanations, such as diet, provide an explanation for certain morphological variations at birth. These results confirm previous work on perinatal indriids indicating that these and other primates telegraph their feeding adaptations well before masticatory anatomy is functional. Quantitative analyses are required to decipher specific dietary and other influences on dental size and maturation in the newborn primate.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1002/ar.23273" target="_blank" rel="noreferrer noopener">10.1002/ar.23273</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Tooth Eruption/physiology
2015
Anatomical record (Hoboken, N.J. : 2007)
Animals
anthropoid
Bonar Christopher J
DeLeon Valerie B
Dentition
development
Evans Sian
Gingiva/*anatomy & histology/*growth & development
haplorhine
Jankord Kathryn D
Jaw/*anatomy & histology/physiology
Muchlinski Magdalena N
Newborn
Odontogenesis/physiology
Permanent
Primates/*anatomy & histology/*growth & development
Progar Abbigal J
Smith Timothy D
Species Specificity
strepsirrhine
Tarsius
Teeth
Vinyard Christopher J
Williams Lawrence