Data from: Evolutionary origins of teeth in jawed vertebrates: conflicting data from acanthothoracid dental plates (‘Placodermi’) ...

• Main Authors: Meredith Smith, Moya, Clark, Brett, Goujet, Daniel, Johanson, Zerina
• Format: Dataset
• Language: English
• Published: Dryad 2018
• Subjects: placoderm; acanthothoracid; Romundina; Dentition; origins; Teeth; Canada; Prince of Wales Island
• Online Access: https://dx.doi.org/10.5061/dryad.hr718; https://datadryad.org/stash/dataset/doi:10.5061/dryad.hr718

Placoderms (Devonian fossil fishes) are resolved phylogenetically to the base of jawed vertebrates and provide important evidence for evolutionary origins of teeth, particularly with respect to the Arthrodira. The arthrodires represent a derived group of placoderms; the dentition of other more primitive placoderms such as the acanthothoracids is less well known. Articulated acanthothoracid dental plates are rare; x-ray computed tomography of a single, unique specimen, along with 3D segmentation of bone, oral denticles and vascular spaces, provides intrinsic developmental and topological information relevant to tooth origins. Recently, a disarticulated element was identified as a dental plate of the acanthothoracid Romundina stellina, with synchrotron microtomography providing characters to comment on ongoing debates regarding the evolution of teeth. We used segmental quantitative methods to re-analyse this data, for comparison to the articulated and unquestionable acanthothoracid dental plates above. We ... : CPW.9A DG counterpart_01CT-scan. vol/vgi file may be opened in Amira or the program Drishti (http://anusf.anu.edu.au/Vizlab/drishti/).ZJ_CPW.9A_DG_counterpart_01.zipCPW.9A DG dentition_01CT-scan, Natural History Museum of the placoderm CPW.9A dentition. vol/vgi file may be opened in Amira or the program Drishti (http://anusf.anu.edu.au/Vizlab/drishti/).ZJ_CPW.9A_DG_dentition_01.zipCPW.9A ASG aboral surfaceAcanthothoraci (CPW.9A); 'Placodermi', Prince of Wales Island, Canada (Early Devonian, Lochkovian). Movie with virtual sections progressing anteroposteriorly, to show the flatter aboral surface of the ASG oral plate, and its connection to the ethmoidal region of the braincase.CPW.9A ASG vasculatureAcanthothoraci (CPW.9A); 'Placodermi', Prince of Wales Island, Canada (Early Devonian, Lochkovian). Movie showing oral denticles and associated vasculature (large blood vessels and capillary bed).Smith et al. Supplementary informationThis is a folder that includes two files: Smith_et_al._Supplementary_Information ...