English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Serial grinding, a popular but destructive technique in the early twentieth century, allows for the detailed tomographic study of vertebrate fossils. Specimen BP/1/1821 (formerly BPI/1/346) is a procynosuchid cynodont (Therapsida) that underwent serial grinding by A.S. Brink in 1961, resulting in a detailed and insightful study of its skull anatomy. However, BP/1/1821 was also designated by Brink as the holotype, and only specimen, of a new (now a junior synonym of Procynosuchus delaharpeae) species of cynodont: ‘Scalopocynodon gracilis’. This species has subsequently been recognised as a junior synonym of Procynosuchus delaharpeae, but the destruction of a holotype remains an irreversible loss. Brink built an enlarged wax model from the serial sections, but it is degrading rapidly. In this article, we explain how we retrieved Brink’s original drawings of the sections, and how we were able to build a new digital model of this specimen using a scanner, virtual stack alignment, and 3D imaging. Comparison with previously published drawings demonstrates the accuracy of this digital model. With a 3D printer, we then re-created a more accurate replication of BP/1/1821 with resin. This life-sized replica now helps to complete the collections of the Evolutionary Studies Institute (University of the Witwatersrand, Johannesburg, South Africa) and replaces the long lost original specimen. The possibility to re-use these old data for palaeontological research is also addressed. Julien Benoit. Evolutionary Studies Institute (ESI); School of Geosciences, University of the Witwatersrand, PO Wits, 2050, Johannesburg, South Africa; School of Anatomical Sciences, University of the Witwatersrand, 7 York Road, Parktown, 2193, Johannesburg, South Africa. julien.benoit@wits.ac.za Sandra C. Jasinoski. Evolutionary Studies Institute (ESI); School of Geosciences, University of the Witwatersrand, PO Wits, 2050, Johannesburg, South Africa. sandra_jas@hotmail.com

Picking up the pieces: the digital reconstruction of a destroyed holotype from its serial section drawings