1
40
4
-
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
177-188
Issue
2
Volume
49
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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
A New Reconstruction Of Multituberculate Endocranial Casts And Encephalization Quotient Of Kryptobaatar
Publisher
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Acta Palaeontologica Polonica
Date
A point or period of time associated with an event in the lifecycle of the resource
2004
2004-04
Subject
The topic of the resource
body mass; body-weight; brain; brain structure; cistern; encephalization quotient; endocasts; evolution; Kryptobaatar; Late Cretaceous; mammals; Mongolia; multituberculata; Paleontology; phylogeny; size; superior; tooth
Creator
An entity primarily responsible for making the resource
Kielan-Jaworowska Z; Lancaster T
Description
An account of the resource
Multituberculate and eutriconodontan endocasts differ from those of primitive therian mammals in their lack of visible midbrain exposure oil the dorsal side and in having a vermis-like triangular bulge (recognized herein as the cast of a large sinus-the superior cistern) inserted between the cerebral hemispheres. As the shape and proportions of multituberculate. eutriconodontan, and Cretaceous eutherian endocasts are otherwise similar, one might speculate that the multituberculate and eutriconodontan brains did not differ essentially from those of primitive eutherian and marsupial mammals, in which the midbrain is exposed dorsally. This conclusion might have important phylogenetic implications, as multituberculates and eutriconodontans may lay closer to the therians sensu strico, than hitherto believed. We describe an endocast of the Late Cretaceous multi tuberculate Kryptobaatar, which differs from those of other multituberculates (Ptilodus, Chulsan-baatar. and Nemegtbaatar) in having unusually long olfactory bulbs and the paraflocculi elongated transversely, rather than ball-shaped. We estimate the encephalization quotient (EQ) of Kryptobaatar, using: 1) Jerison's classical equation (1) based on estimation of endocranial volume and body mass-, 2) McDermott et al.'s derived body mass estimation equation (2) using upper molar lengths; and 3) estimation of body mass based on new equations (3a, 3b, 3c, and 3d(1-9)), which we propose, using measurements of the humerus, radius, ulna, femur and tibia. In both Jerison's method and a mean of out series of derived formulae, the EQ varies around 0.71, which is higher than estimated for other multituberculate mammals. It remains an open question whether the evolutionary success of Kryptobaatar (which was a dominant mammal during the ?early Campanian on the Gobi Desert and survived until the ?late Campanian) might have been related to its relatively high EQ and well developed sensorimotor adaptations, in particular olfaction and coordinated movements.
Identifier
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n/a
Format
The file format, physical medium, or dimensions of the resource
Journal Article or Conference Abstract Publication
2004
Acta Palaeontologica Polonica
body mass
body-weight
Brain
brain structure
cistern
encephalization quotient
endocasts
Evolution
Journal Article or Conference Abstract Publication
Kielan-Jaworowska Z
Kryptobaatar
Lancaster T
Late Cretaceous
Mammals
Mongolia
multituberculata
Paleontology
Phylogeny
size
superior
Tooth
-
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/10.4202/app.00119.2014" target="_blank" rel="noreferrer noopener">http://doi.org/10.4202/app.00119.2014</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
125-134
Issue
1
Volume
61
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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
Pathological phalanges in a camarasaurid sauropod dinosaur and implications on behaviour
Publisher
An entity responsible for making the resource available
Acta Palaeontologica Polonica
Date
A point or period of time associated with an event in the lifecycle of the resource
2016
2016
Subject
The topic of the resource
bone; bone tumour; camarasaurids; degenerative joint disease; Dinosauria; entheses; enthesophytes; histology; Jurassic; life-style; morphology; Morrison Formation; muscles; osteoarthritis; osteoblastoma; osteochondrosis; osteoid osteoma; Paleontology; paleopathology; Sauropoda; tendon; USA; Wyoming
Creator
An entity primarily responsible for making the resource
Tschopp E; Wings O; Frauenfelder T; Rothschild B M
Description
An account of the resource
Several types of pathological bony overgrowth are known from various dinosaur taxa but, except for stress fractures, are rarely reported from appendicular elements. Herein we describe pathological manual and pedal phalanges of a camarasaurid sauropod (SMA 0002), which show features rarely recognised in non-avian dinosaurs. They include lateral osteophytes and smoothing of phalangeal articular surfaces, a deep pit, proximal enthesophytes in pedal unguals, distal overgrowth associated with a fracture, and a knob-like overgrowth lateral to the distal condyles of a pedal phalanx. Their causes were assessed by means of visual examination, CT scans, and bone histology, where possible. The lateral osteophytes are interpreted as symptoms of osteoarthritis. The ossified tendon insertions in the unguals are most probably the result of prolonged, heavy use of the pedal claws, possibly for scratch-digging. The distal overgrowth is interpreted to have developed due to changed stress regimes, and to be the cause for the fracture. The deep pit represents most likely a case of osteochondrosis, whereas the knob-like overgrowth likely represents a post-traumatic phenomenon not previously reported in dinosaurs. The study confirms that a rigorous assessment of pathologies can yield information about behaviour in long-extinct animals.
Identifier
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<a href="http://doi.org/10.4202/app.00119.2014" target="_blank" rel="noreferrer noopener">10.4202/app.00119.2014</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2016
Acta Palaeontologica Polonica
Bone
bone tumour
camarasaurids
degenerative joint disease
Dinosauria
entheses
enthesophytes
Frauenfelder T
histology
Journal Article
Jurassic
life-style
morphology
Morrison Formation
Muscles
Osteoarthritis
osteoblastoma
OSTEOCHONDROSIS
osteoid osteoma
Paleontology
Paleopathology
Rothschild B M
Sauropoda
tendon
Tschopp E
USA
Wings O
Wyoming
-
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/10.4202/app.2009.0102" target="_blank" rel="noreferrer noopener">http://doi.org/10.4202/app.2009.0102</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
7-13
Issue
1
Volume
54
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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
A new Miocene sirenian from Kutch, India
Publisher
An entity responsible for making the resource available
Acta Palaeontologica Polonica
Date
A point or period of time associated with an event in the lifecycle of the resource
2009
2009-03
Subject
The topic of the resource
eocene; India; kachchh; mammalia; mammalia; miocene; Paleontology; Sirenia
Creator
An entity primarily responsible for making the resource
Thewissen J G M; Bajpai S
Description
An account of the resource
We report a new Miocene sirenian from District Kutch, State of Gujarat, India: Domingia sodhae gen. et sp. nov. The new species is a dugongine dugongid with flattened tusk-like upper incisors. Like some other Miocene dugongids, Domningia is large and has complex, bilophodont molars and three-rooted premolars, which are strongly worn. The rostrum is downturned significantly, similar to modern dugongs, and indicative of a specialized feeding mode. Phylogenetically, it is closely related to Dioplotherium, Rytiodus, Corystosiren, and Bharatisiren. Among these, Domningia is most similar to Bharatisiren indica and Dioplotherium manigaulti, in that all three taxa retain multi-rooted premolars. Similar to Bharatisiren, the nasal process of the premaxilla is long. Bharatisiren and Domningia are part of a late Oligocene and early Miocene radiation of dugongines in South Asia.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.4202/app.2009.0102" target="_blank" rel="noreferrer noopener">10.4202/app.2009.0102</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2009
Acta Palaeontologica Polonica
Bajpai S
eocene
India
Journal Article
kachchh
Mammalia
miocene
Paleontology
Sirenia
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/10.4202/app.2012.0113" target="_blank" rel="noreferrer noopener">http://doi.org/10.4202/app.2012.0113</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
163-167
Issue
1
Volume
60
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
A name given to the resource
Decompression syndrome and diving behavior in Odontochelys, the first turtle
Publisher
An entity responsible for making the resource available
Acta Palaeontologica Polonica
Date
A point or period of time associated with an event in the lifecycle of the resource
2015
2015-03
Subject
The topic of the resource
3-degrees-c; adaptations; avascular necrosis; bone pathology; caretta-caretta; China; diving behavior; gas-exchange; Ichthyosaurs; leatherback turtle; Odontochelys; osteoarthritis; osteomyelitis; Paleontology; sea; Testudines; Triassic; turtle
Creator
An entity primarily responsible for making the resource
Rothschild B M; Naples V
Description
An account of the resource
Odontochelys semitestacea, the oldest known turtle, from the Late Triassic of China, shows a pathology. Sharply defined, focal depressions were noted on the articular surfaces of both humeri, documenting avascular necrosis. Diving habits of Mesozoic marine reptiles have been characterized on the basis of this localized form of bone death attributed to decompression syndrome. Pursuit by a predator was likely the cause of dangerously rapid depth changes by swimming turtles. The prevalence of avascular necrosis decreased geometrically from the Cretaceous to the Pleistocene. This study suggests that the habit of repetitive diving in turtles was already present in the Late Triassic, but that protective physiological and behavioral adaptations had not yet evolved.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.4202/app.2012.0113" target="_blank" rel="noreferrer noopener">10.4202/app.2012.0113</a>
Format
The file format, physical medium, or dimensions of the resource
Journal Article
2015
3-degrees-c
Acta Palaeontologica Polonica
adaptations
avascular necrosis
bone pathology
caretta-caretta
China
diving behavior
gas-exchange
Ichthyosaurs
Journal Article
leatherback turtle
Naples V
Odontochelys
Osteoarthritis
Osteomyelitis
Paleontology
Rothschild B M
SEA
Testudines
Triassic
turtle