Encrinus aculeatus (Crinoidea: Encrinida) with exceptional preservation of organic pigments from the Middle Triassic of Lower Silesia (SW Poland)
Abstract:The crinoid species Encrinus aculeatus v. Meyer, 1847 is reported for the first time from the Middle Triassic of Lower Silesia (North-Sudetic Synclinorium). The present paper describes two articulated crowns of this species, an adult and a juvenile(?) specimen, found in the Lower Muschelkalk of Raciborowice. Both specimens display a distinct purple to violet coloration. Chemical analysis based on ultraviolet/visible spectroscopy and mass spectrometry provides evidence that the characteristic color is due to the presence of organic compounds, fossil hypericinoid pigments, which are closely related to pigments of Recent crinoids. The new occurrence from the early Pelsonian Punctospirella Bed indicates that fossil hypericinoid pigments were more widespread in encrinids than previously known. Sedimentation conditions of the intraformational conglomerates, in which these crinoids were found, are discussed.
Document Type: Research Article
Publication date: 2011-11-01
More about this publication?
- Neues Jahrbuch f�r Geologie und Pal�ontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Ingenta Connect is not responsible for the content or availability of external websites