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

The rare trace fossil  Ctenopholeus kutscheri  Seilacher &amp; Hemleben, originally described from the type area of the early Devonian Hunsrück Slate at Gemünden (Germany), refers to initially open horizontal tunnels with vertically to obliquely oriented serial shafts opening to the sediment-water interface. Occurrences of frequent and partly exceptionally large specimens from Bundenbach, tentatively assigned here to  C. kutscheri , reveal that these burrows, were constructed in larger numbers in the Hunsrück Slate. This happened when environmental conditions were favorable for the producer(s). Contributing factors presumably include substrate cohesion and stability being suitable for the maintenance of open burrow systems, as well as sustainable food resources during the time interval when the burrows were occupied. The new material confirms that the course of the shafts in  C. kutscheri  varies from almost straight to slightly bent to circular in cleavage plane view and may overlap with morphologies observed in  Heliochone hunsrueckiana  Seilacher &amp; Hemleben. Holothurians and, more likely, crustaceans are discussed as possible producers of  C. kutscheri  from the Hunsrück Slate.

New records of Ctenopholeus in the early Devonian Hunsrück Slate of Bundenbach, SW Germany