Abstract

Antiarch placoderms, the most basal jawed vertebrates, have the potential to enlighten the origin of the last common ancestor of jawed vertebrates. Quantitative study based on credible data is more convincing than qualitative study. To reveal the antiarch distribution in space and time, we created a comprehensive structured dataset of antiarchs comprising 64 genera and 6025 records. This dataset, which includes associated chronological and geographic information, has been digitalized from academic publications manually into the DeepBone database as a dateset. We implemented the paleogeographic map marker to visualize the biogeography of antiarchs. The comprehensive data of Antiarcha allow us to generate its biodiversity and variation rate changes throughout its duration. Structured data of antiarchs has tremendous research potential, including testing hypotheses in the fields of the biodiversity changes, distribution, differentiation,population and community composition. Also, it will be easily accessible by the other tools to generate new understanding on the evolution of early vertebrates. The data file described in this paper is available on https://doi.org/10.5281/zenodo.5639529 (Pan and Zhu, 2021).

Highlights

  • Placodermi is an extinct grade of jawed vertebrates that first occurred in the Silurian and dominated the Devonian (Carr, 1995; Young, 2010)

  • Among all the referred specimens, 6.51% belong to Yunnanolepidoidei, 2.86% belong to Sinolepidoidei, 78.92% belong to ‘Bothriolepidoidei’, and 11.71% belong to Asterolepidoidei

  • The earliest asterolepidoid records are represented by Wurungulepis and some disarticulated specimens, which had been documented from the Broken River Formation, Broken River, Australia

Read more

Summary

Introduction

Placodermi is an extinct grade of jawed vertebrates that first occurred in the Silurian and dominated the Devonian (Carr, 1995; Young, 2010). Recent prevailing phylogenetic hypotheses placed Placodermi as jawed stem-Gnathostomata that is sister to crown-Gnathostomata or modern jawed vertebrates (Brazeau, 2009; Davis et al, 2012; Dupret et al, 2014; Giles et al, 2015; King, 2021; Long et al, 2015; 30 Qiao et al, 2016; Trinajstic et al, 2015; Zhu et al, 2013, 2016). Antiarcha was a widely distributed, diverse, and successful group within Placodermi from the late Silurian to the end of Devonian (Denison, 1978; Janvier, 35 1996; Zhao et al, 2016; Zhu, 1996) to allow the inference of biogeographic assumptions (Ritchie et al, 1992; Young, 1984b).

Objectives
Methods
Results
Discussion
Conclusion
Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.