@ARTICLE{TreeBASE2Ref26221,
author = {Natasha S. Vitek and Igor G. Danilov and Yasuhisa Nakajima and Ren Hirayama},
title = {Redescription of the skull of ?Trionyx? kyrgyzensis and improved phylogenetic taxon sampling of Cretaceous and Paleogene soft-shelled turtles (Trionychidae) of Asia, including the oldest crown trionychids},
year = {2017},
keywords = {Testudines, Trionychidae, divergence dates, cranial circulation},
doi = {},
url = {http://},
pmid = {},
journal = {Journal of Systematic Palaeontology},
volume = {},
number = {},
pages = {},
abstract = {Although fossils of Trionychidae are found as far back as the Early Cretaceous, their evolutionary history, including the origin of the crown clade, is poorly understood. Here, we use a microCT scan of the skull of ?Trionyx? kyrgyzensis from the late Early Cretaceous (Albian) of Kyrgyzstan as the basis for a thorough redescription of the cranial morphology of this species. New information includes the pattern of cranial circulation, which is comparable to all extant trionychids. A unique combination of cranial and postcranial characters of ?Trionyx? kyrgyzensis allows us to establish for it a new genus Petrochelys. The data regarding Petrochelys kyrgyzensis are incorporated into a phylogenetic analysis. When Petrochelys kyrgyzensis is analyzed without including additional, extinct taxa, it is placed in a highly derived position within the extant Nilssonia. However, the addition of five Cretaceous?Paleogene taxa breaks up hypothesized long branches and results in more basal positions for Petrochelys kyrgyzensis within recovered trees. All results support the hypothesis that Petrochelys kyrgyzensis is a crown trionychid and a member of Trionychinae. Our results highlight the importance of including multiple extinct taxa in phylogenetic analysis prior to using any of those taxa as calibration points in divergence dating estimates.}
}
Citation for Study 19738
Citation title:
"Redescription of the skull of ?Trionyx? kyrgyzensis and improved phylogenetic taxon sampling of Cretaceous and Paleogene soft-shelled turtles (Trionychidae) of Asia, including the oldest crown trionychids".
Study name:
"Redescription of the skull of ?Trionyx? kyrgyzensis and improved phylogenetic taxon sampling of Cretaceous and Paleogene soft-shelled turtles (Trionychidae) of Asia, including the oldest crown trionychids".
This study is part of submission 19738
(Status: Published).
Citation
Vitek N.S., Danilov I.G., Nakajima Y., & Hirayama R. 2017. Redescription of the skull of ?Trionyx? kyrgyzensis and improved phylogenetic taxon sampling of Cretaceous and Paleogene soft-shelled turtles (Trionychidae) of Asia, including the oldest crown trionychids. Journal of Systematic Palaeontology, .
Authors
-
Vitek N.S.
(submitter)
919 270 8335
-
Danilov I.G.
-
Nakajima Y.
-
Hirayama R.
Abstract
Although fossils of Trionychidae are found as far back as the Early Cretaceous, their evolutionary history, including the origin of the crown clade, is poorly understood. Here, we use a microCT scan of the skull of ?Trionyx? kyrgyzensis from the late Early Cretaceous (Albian) of Kyrgyzstan as the basis for a thorough redescription of the cranial morphology of this species. New information includes the pattern of cranial circulation, which is comparable to all extant trionychids. A unique combination of cranial and postcranial characters of ?Trionyx? kyrgyzensis allows us to establish for it a new genus Petrochelys. The data regarding Petrochelys kyrgyzensis are incorporated into a phylogenetic analysis. When Petrochelys kyrgyzensis is analyzed without including additional, extinct taxa, it is placed in a highly derived position within the extant Nilssonia. However, the addition of five Cretaceous?Paleogene taxa breaks up hypothesized long branches and results in more basal positions for Petrochelys kyrgyzensis within recovered trees. All results support the hypothesis that Petrochelys kyrgyzensis is a crown trionychid and a member of Trionychinae. Our results highlight the importance of including multiple extinct taxa in phylogenetic analysis prior to using any of those taxa as calibration points in divergence dating estimates.
Keywords
Testudines, Trionychidae, divergence dates, cranial circulation
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S19738
- Other versions:
Nexus
NeXML
- Show BibTeX reference
@ARTICLE{TreeBASE2Ref26221,
author = {Natasha S. Vitek and Igor G. Danilov and Yasuhisa Nakajima and Ren Hirayama},
title = {Redescription of the skull of ?Trionyx? kyrgyzensis and improved phylogenetic taxon sampling of Cretaceous and Paleogene soft-shelled turtles (Trionychidae) of Asia, including the oldest crown trionychids},
year = {2017},
keywords = {Testudines, Trionychidae, divergence dates, cranial circulation},
doi = {},
url = {http://},
pmid = {},
journal = {Journal of Systematic Palaeontology},
volume = {},
number = {},
pages = {},
abstract = {Although fossils of Trionychidae are found as far back as the Early Cretaceous, their evolutionary history, including the origin of the crown clade, is poorly understood. Here, we use a microCT scan of the skull of ?Trionyx? kyrgyzensis from the late Early Cretaceous (Albian) of Kyrgyzstan as the basis for a thorough redescription of the cranial morphology of this species. New information includes the pattern of cranial circulation, which is comparable to all extant trionychids. A unique combination of cranial and postcranial characters of ?Trionyx? kyrgyzensis allows us to establish for it a new genus Petrochelys. The data regarding Petrochelys kyrgyzensis are incorporated into a phylogenetic analysis. When Petrochelys kyrgyzensis is analyzed without including additional, extinct taxa, it is placed in a highly derived position within the extant Nilssonia. However, the addition of five Cretaceous?Paleogene taxa breaks up hypothesized long branches and results in more basal positions for Petrochelys kyrgyzensis within recovered trees. All results support the hypothesis that Petrochelys kyrgyzensis is a crown trionychid and a member of Trionychinae. Our results highlight the importance of including multiple extinct taxa in phylogenetic analysis prior to using any of those taxa as calibration points in divergence dating estimates.}
}
- Show RIS reference
TY - JOUR
ID - 26221
AU - Vitek,Natasha S.
AU - Danilov,Igor G.
AU - Nakajima,Yasuhisa
AU - Hirayama,Ren
T1 - Redescription of the skull of ?Trionyx? kyrgyzensis and improved phylogenetic taxon sampling of Cretaceous and Paleogene soft-shelled turtles (Trionychidae) of Asia, including the oldest crown trionychids
PY - 2017
KW - Testudines
KW - Trionychidae
KW - divergence dates
KW - cranial circulation
UR - http://dx.doi.org/
N2 - Although fossils of Trionychidae are found as far back as the Early Cretaceous, their evolutionary history, including the origin of the crown clade, is poorly understood. Here, we use a microCT scan of the skull of ?Trionyx? kyrgyzensis from the late Early Cretaceous (Albian) of Kyrgyzstan as the basis for a thorough redescription of the cranial morphology of this species. New information includes the pattern of cranial circulation, which is comparable to all extant trionychids. A unique combination of cranial and postcranial characters of ?Trionyx? kyrgyzensis allows us to establish for it a new genus Petrochelys. The data regarding Petrochelys kyrgyzensis are incorporated into a phylogenetic analysis. When Petrochelys kyrgyzensis is analyzed without including additional, extinct taxa, it is placed in a highly derived position within the extant Nilssonia. However, the addition of five Cretaceous?Paleogene taxa breaks up hypothesized long branches and results in more basal positions for Petrochelys kyrgyzensis within recovered trees. All results support the hypothesis that Petrochelys kyrgyzensis is a crown trionychid and a member of Trionychinae. Our results highlight the importance of including multiple extinct taxa in phylogenetic analysis prior to using any of those taxa as calibration points in divergence dating estimates.
L3 -
JF - Journal of Systematic Palaeontology
VL -
IS -
ER -
Go to search
Citation
Taxa
Matrices
Trees
Analyses
