1
40
3
-
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/dvg.23076" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/dvg.23076</a>
Issue
1
Volume
56
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
Review and experimental evaluation of the embryonic development and evolutionary history of flipper development and hyperphalangy in dolphins (Cetacea: Mammalia).
Publisher
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Genesis (New York, N.Y. : 2000)
Date
A point or period of time associated with an event in the lifecycle of the resource
2018
2018-01
Subject
The topic of the resource
*Biological Evolution; *cetacea; *FGF; *flipper; *WNT; Animals; Body Patterning; Dolphins/*embryology; Extremities/*embryology; Mammals
Creator
An entity primarily responsible for making the resource
Cooper Lisa Noelle; Sears Karen E; Armfield Brooke A; Kala Bhavneet; Hubler Merla; Thewissen J G M
Description
An account of the resource
Cetaceans are the only mammals to have evolved hyperphalangy, an increase in the number of phalanges beyond the mammalian plesiomorphic condition of three phalanges per digit. In this study, cetaceans were used as a novel model to review previous studies of mammalian hyperphalangy and contribute new experimental evidence as to the molecular origins of this phenotype in embryos of the pantropical spotted dolphin (Stenella attenuata). Results show embryos of dolphins, mice, and pigs share similar spatiotemporal patterns of signaling proteins known to shape limbs of mammals (e.g., FGF8, BMP2/4, WNT, GREM). However, fetal dolphins differ in that their interdigital tissues are retained, instead of undergoing apoptosis, and that multiple waves of interdigital signals likely contribute to the patterning of supernumerary joints and phalanges in adjacent digits. Integration of fossil and experimental evidence suggests that the presence of interdigital webbing within the fossils of semi-aquatic cetaceans, recovered from the Eocene Epoch (49Ma), was probably the result of
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1002/dvg.23076" target="_blank" rel="noreferrer noopener">10.1002/dvg.23076</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).
*Biological Evolution
*cetacea
*FGF
*flipper
*WNT
2018
Animals
Armfield Brooke A
Body Patterning
Cooper Lisa Noelle
Department of Anatomy & Neurobiology
Dolphins/*embryology
Extremities/*embryology
Genesis (New York, N.Y. : 2000)
Hubler Merla
Kala Bhavneet
Mammals
NEOMED College of Medicine
Sears Karen E
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/10.7717/peerj.24" target="_blank" rel="noreferrer noopener">http://doi.org/10.7717/peerj.24</a>
Pages
e24–e24
Volume
1
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
Development and evolution of the unique cetacean dentition.
Publisher
An entity responsible for making the resource available
PeerJ
Date
A point or period of time associated with an event in the lifecycle of the resource
2013
1905-07
Subject
The topic of the resource
Teeth; Cetacea; Cetacean; Evo-devo; Paleontology
Creator
An entity primarily responsible for making the resource
Armfield Brooke A; Zheng Zhengui; Bajpai Sunil; Vinyard Christopher J; Thewissen J G M
Description
An account of the resource
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 mastication. These major evolutionary innovations characterize most members of the Class Mammalia. Cetaceans are one of the few groups of mammals in which precise occlusion has been secondarily lost. Most toothed whales have an increased number of simple crowned teeth that are similar along the tooth row. Evolution toward these specializations began immediately after the time cetaceans transitioned from terrestrial-to-marine environments. The fossil record documents the critical aspects of occlusal evolution of cetaceans, and allows us to pinpoint the evolutionary timing of the macroevolutionary events leading to their unusual dental morphology among mammals. The developmental controls of tooth differentiation and tooth number have been studied in a few mammalian clades, but nothing is known about how these controls differ between cetaceans and mammals that retain functional occlusion. Here we show that pigs, a cetacean relative with regionalized tooth morphology and complex tooth crowns, retain the typical mammalian gene expression patterns that control early tooth differentiation, expressing Bmp4 in the rostral (mesial, anterior) domain of the jaw, and Fgf8 caudally (distal, posterior). By contrast, dolphins have lost these regional differences in dental morphology and the Bmp4 domain is extended into the caudal region of the developing jaw. We hypothesize that the functional constraints underlying mammalian occlusion have been released in cetaceans, facilitating changes in the genetic control of early dental development. Such major developmental changes drive morphological evolution and are correlated with major shifts in diet and food processing during cetacean evolution.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.7717/peerj.24" target="_blank" rel="noreferrer noopener">10.7717/peerj.24</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).
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
-
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.21251" target="_blank" rel="noreferrer noopener">http://doi.org/10.1002/ajpa.21251</a>
Pages
519–530
Issue
4
Volume
142
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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An interspecific analysis of relative jaw-joint height in primates.
Publisher
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American journal of physical anthropology
Date
A point or period of time associated with an event in the lifecycle of the resource
2010
2010-08
Subject
The topic of the resource
Analysis of Variance; Animals; Female; Haplorhini/*anatomy & histology; Male; Phylogeny; Posture/*physiology; Regression Analysis; Skull/anatomy & histology; Strepsirhini/*anatomy & histology; Temporomandibular Joint/*anatomy & histology
Creator
An entity primarily responsible for making the resource
Armfield Brooke A; Vinyard Christopher J
Description
An account of the resource
Jaw-joint height (JJH) above the occlusal plane is thought to be influenced by cranial base angle (CBA) and facial angulation during growth. To better understand how JJH relates to midline craniofacial form, we test the hypothesis that relative increases in JJH are correlated with increasing CBA flexion and facial kyphosis (i.e., ventral bending) across primates. We compared JJH above the occlusal plane to CBA and the angle of facial kyphosis (AFK) across adults from 82 species. JJH scales with positive allometry relative to a skull geometric mean in anthropoids and most likely strepsirrhines. Anthropoid regressions for JJH are elevated above strepsirrhines, whereas catarrhines exhibit a higher slope than platyrrhines. Semipartial correlations between relative JJH and both CBA and AFK show no association across a small strepsirrhine sample, limited associations among catarrhines and anthropoids, but strong correlations in platyrrhines. Contrary to our hypothesis, however, increases in relative JJH are correlated with relatively less flexed basicrania and more airorhynch faces (i.e., reduced ventral bending) in platyrrhines. The mosaic pattern of relationships involving JJH across primate clades points to multiple influences on JJH across primates. In clades showing little association with basicranial and facial angles, such as strepsirrhines, the potential morphological independence of JJH may facilitate a relative freedom for evolutionary changes related to masticatory function. Finally, failure to associate relative JJH and basicranial flexion in most clades suggests that the relatively taller JJH and more flexed basicrania of anthropoids compared to strepsirrhines may have evolved as an isolated event during the origin of anthropoids.
Identifier
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<a href="http://doi.org/10.1002/ajpa.21251" target="_blank" rel="noreferrer noopener">10.1002/ajpa.21251</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).
2010
American journal of physical anthropology
Analysis of Variance
Animals
Armfield Brooke A
Female
Haplorhini/*anatomy & histology
Male
Phylogeny
Posture/*physiology
Regression Analysis
Skull/anatomy & histology
Strepsirhini/*anatomy & histology
Temporomandibular Joint/*anatomy & histology
Vinyard Christopher J