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Anacoracid sharks from the Albian (lower cretaceous) Pawpaw shale of Texas

Siverson, Mikael LU ; Lindgren, Johan LU and Kelley, L. Scott (2007) In Palaeontology 50(4). p.939-950
Abstract
Recent collecting from the Pawpaw Shale in northeast Texas has yielded several hundred teeth of anacoracid sharks. The material allows for a much-needed revision of the Late Albian anacoracids from North America. The previously recognized Squalicorax sp., also referred to as S. volgensis in more recent publications, is a mix of two different species: S. priscoserratus sp. nov. and S. pawpawensis sp. nov. In addition to these two new species, a single tooth is assigned to S. aff. S. baharijensis. Our data indicate that anacoracids were considerably more diverse group in the North American Cretaceous than previously thought. We attribute much of the underestimation of diversity to vague species concepts, poor preparation techniques and the... (More)
Recent collecting from the Pawpaw Shale in northeast Texas has yielded several hundred teeth of anacoracid sharks. The material allows for a much-needed revision of the Late Albian anacoracids from North America. The previously recognized Squalicorax sp., also referred to as S. volgensis in more recent publications, is a mix of two different species: S. priscoserratus sp. nov. and S. pawpawensis sp. nov. In addition to these two new species, a single tooth is assigned to S. aff. S. baharijensis. Our data indicate that anacoracids were considerably more diverse group in the North American Cretaceous than previously thought. We attribute much of the underestimation of diversity to vague species concepts, poor preparation techniques and the associated lack of attention to certain dental features, in particular neck morphology, root surface porosity and the root's vascularization. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cretaceous, Albian, Pawpaw, sharks, Texas, volga, squalicorax
in
Palaeontology
volume
50
issue
4
pages
939 - 950
publisher
Wiley-Blackwell
external identifiers
  • wos:000248687700012
  • scopus:34547403194
ISSN
1475-4983
DOI
10.1111/j.1475-4983.2007.00691.x
language
English
LU publication?
yes
id
8b292e03-ac5c-4039-9dfe-d032a232e965 (old id 688759)
date added to LUP
2007-12-14 15:54:10
date last changed
2017-01-01 04:48:26
@article{8b292e03-ac5c-4039-9dfe-d032a232e965,
  abstract     = {Recent collecting from the Pawpaw Shale in northeast Texas has yielded several hundred teeth of anacoracid sharks. The material allows for a much-needed revision of the Late Albian anacoracids from North America. The previously recognized Squalicorax sp., also referred to as S. volgensis in more recent publications, is a mix of two different species: S. priscoserratus sp. nov. and S. pawpawensis sp. nov. In addition to these two new species, a single tooth is assigned to S. aff. S. baharijensis. Our data indicate that anacoracids were considerably more diverse group in the North American Cretaceous than previously thought. We attribute much of the underestimation of diversity to vague species concepts, poor preparation techniques and the associated lack of attention to certain dental features, in particular neck morphology, root surface porosity and the root's vascularization.},
  author       = {Siverson, Mikael and Lindgren, Johan and Kelley, L. Scott},
  issn         = {1475-4983},
  keyword      = {cretaceous,Albian,Pawpaw,sharks,Texas,volga,squalicorax},
  language     = {eng},
  number       = {4},
  pages        = {939--950},
  publisher    = {Wiley-Blackwell},
  series       = {Palaeontology},
  title        = {Anacoracid sharks from the Albian (lower cretaceous) Pawpaw shale of Texas},
  url          = {http://dx.doi.org/10.1111/j.1475-4983.2007.00691.x},
  volume       = {50},
  year         = {2007},
}