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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  During the Late Jurassic, several groups of eucryptodiran turtles inhabited the shallow epicontinental seas of Western Europe. Plesiochelyidae are an important part of this first radiation of crown-group turtles into coastal marine ecosystems. Fossils of Plesiochelyidae occur in many European localities, and are especially abundant in the Kimmeridgian layers of the Swiss Jura Mountains (Solothurn and Porrentruy). In the mid-19th century, the quarries of Solothurn (NW Switzerland) already provided a large amount of fossil turtles, most notably  Plesiochelys etalloni , the best-known plesiochelyid species. Recent excavations in the Porrentruy area (NW Switzerland) revealed new fossils of  Plesiochelys , including numerous well-preserved shells with associated cranial and postcranial material.    Methods/results  Out of 80 shells referred to  Plesiochelys , 41 are assigned to a new species,  Plesiochelys bigleri  n. sp., including a skull–shell association. We furthermore refer 15 shells to  Plesiochelys etalloni , and 24 shells to  Plesiochelys  sp. Anatomical comparisons show that  Plesiochelys bigleri  can clearly be differentiated from  Plesiochelys etalloni  by cranial features. The shell anatomy and the appendicular skeleton of  Plesiochelys bigleri  and  Plesiochelys etalloni  are very similar. However, a statistical analysis demonstrates that the thickness of neural bones allows to separate the two species based on incomplete material. This study furthermore illustrates the extent of intraspecific variation in the shell anatomy of  Plesiochelys bigleri  and  Plesiochelys etalloni .

The comparative osteology ofPlesiochelys biglerin. sp., a new coastal marine turtle from the Late Jurassic of Porrentruy (Switzerland)