A giant boring in a Silurian stromatoporoid analysed by computer tomography

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Beuck L, Wisshak M, Munnecke A, Freiwald A
Zeitschrift: Acta Palaeontologica Polonica
Jahr der Veröffentlichung: 2008
Band: 53
Heftnummer: 1
Seitenbereich: 149-160
ISSN: 0567-7920
eISSN: 1732-2421
Sprache: Englisch


Abstract


This study describes the largest known Palaeozoic boring trace, Osprioneides kampto igen. et isp. nov., found within a stromatoporoid Densastroma pexisum from the Upper Visby Formation (lower Wenlock, Silurian) on the island of Gotland, Sweden. Differences between the physical properties of the stromatoporoid, and the dense micritic infilling of the borings allowed the application of the CT-scan technology for the 2D and 3D-visualisation of this rare trace. The additional application of a stereoscopic technique on these CT images and movies enhances its value for unravelling spatial orientations. This non-destructive method has a great potential for future macro- as well as microboring analyses, The trace maker, most likely a worm, infested the hosting colony post-mortem with up to 120 mm long borings measuring 5-17 mm in diameter. Smaller forms of Trypanites and Palaeosabella within the same stromatoporoid preferentially occur in the outer coenosteum and occasionally in abandoned borings of O. kampto. The stratigraphic position of O. kampto follows the "Great Ordovician Biodiversification Event" in time, and reflects the increase in diversity of boring species. Borings with penetration-depths of 120 mm are, however, unique findings for the Palaeozoic and were not exceeded until some 260 million years later (Bajocian, Middle Jurassic) when the "Mesozoic Marine Revolution" led to convergent reinventions as a result of enhance predation, grazing pressure, and ecospace competition.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Munnecke, Axel Prof. Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)


Zitierweisen

APA:
Beuck, L., Wisshak, M., Munnecke, A., & Freiwald, A. (2008). A giant boring in a Silurian stromatoporoid analysed by computer tomography. Acta Palaeontologica Polonica, 53(1), 149-160. https://dx.doi.org/10.4202/app.2008.0111

MLA:
Beuck, Lydia, et al. "A giant boring in a Silurian stromatoporoid analysed by computer tomography." Acta Palaeontologica Polonica 53.1 (2008): 149-160.

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