Results 71 to 80 of about 327 (156)

Microvertebrate assemblages from the Upper Silurian of Cornwallis Island, Arctic Canada

, 1999
Microvertebrate assemblages from four Upper Silurian (?Ludlow-Pridoli) localities on Cornwallis Island, Arctic Canada, comprise mainly scales, plus dentition cones and jaw fragments from ischnacanthid acanthodians, with rare scales assigned to ...
Vergoossen, JMJ, Uyeno, TT, Turner, S, Burrow, CJ, Thorsteinsson, R   +4 more
core   +3 more sources

Postcranial disparity of galeaspids and the evolution of swimming speeds in stem-gnathostomes. [PDF]

Natl Sci Rev, 2023
Gai Z, Lin X, Shan X, Ferrón HG, Donoghue PCJ.   +4 more
europepmc   +1 more source

A new antarctaspid (Placodermi, Arthrodira) from the Lower Devonian of Yunnan, China

Journal of Vertebrate Paleontology
Antarctaspids, a basal subgroup within the Arthrodira, display a mosaic of arthrodire and petalichthyid features. However, their morphology has remained poorly understood due to the paucity of well-preserved specimens. Here, we describe a new antarctaspid arthrodire, Panjiangosteus eurycephala gen. et sp.
Qinyuan Xue, Qi Guan, Zumin Xian, Xiong Mo, Yingtian Zhao, Qiang Li, Youan Zhu, Min Zhu   +7 more
openaire   +1 more source

THE ENDOSKELETON OF SHOULDER GIRDLE IN PTYCTODONTS (PLACODERMI) [PDF]

Proceedings of the Estonian Academy of Sciences. Geology, 1991
Elga Mark-Kurik, Alexander Ivanov, Olga Obrucheva   +2 more
openaire   +1 more source

Smith et al. Supplementary information

, 2017
This is a folder that includes two files: Smith_et_al._Supplementary_Information (doc) and Smith_et_al._Supplementary_Information (pdf). Description of CPW.9A and Fig.
Daniel Goujet (162632), Meredith Smith, Moya, Zerina Johanson (723989), Clark, Brett, Johanson, Zerina, Moya Meredith Smith (723993), Brett Clark (379810), Goujet, Daniel   +7 more
core   +1 more source

Separate evolutionary origins of teeth from evidence in fossil jawed vertebrates.

, 2003
Placoderms are extinct jawed fishes of the class Placodermi and are basal among jawed vertebrates. It is generally thought that teeth are absent in placoderms and that the phylogenetic origin of teeth occurred after the evolution of jaws. However, we now
Smith, M M, Johanson, Z
core   +1 more source

Functional anatomy, jaw mechanisms, and feeding behavior of Dunkleosteus terrelli (Placodermi, Arthrodira)

The Anatomical Record
Abstract The comparative and functional anatomy of the cleaver‐like jaws of the Late Devonian arthrodire Dunkleosteus terrelli remains poorly understood, despite significant advances in our understanding of arthrodire anatomy. Here, we re‐investigate the jaw morphology of
Russell K. Engelman, Robert K. Carr, Kate Trinajstic, Zerina Johanson, Oleg A. Lebedev   +4 more
openaire   +2 more sources

A new species of Bothriolepis (Placodermi: Bothriolepidae) from the Upper Devonian of Virginia (USA)

, 1981
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Weems, R. E. (Robert E.), Beem, Kenneth A., Miller, T A   +2 more
openaire   +1 more source

Redeployment of odontode gene regulatory network underlies dermal denticle formation and evolution in suckermouth armored catfish. [PDF]

Sci Rep, 2022
Mori S, Nakamura T.
europepmc   +1 more source

A new antiarch placoderm from the Emsian (Early Devonian) of Wuding, Yunnan, China

, 2017
Wufengshania magniforaminis, a new genus and species of the Euantiarcha (Placodermi: Antiarcha), is described from the late Emsian (Early Devonian) of Wuding, Yunnan, southwestern China.
Liantao Jia, Min Zhu, You’An Zhu, Pan, Zhaohui,, Zhu, You-an,, Jia, Liantao,, Zhu, Min,, Zhaohui Pan   +7 more
core   +1 more source