A small collection of echinoderm holdfasts from the Ludlow Cardiola Formation of the Carnic Alps (Austria) contains a wide range of morphologies as a response of environmental adaptation. In general, the holdfasts have a globous and massive dome-like profile with several processes arranged in a sub-radial disposition, so to create a sort of ‘star-like’ outline. A small central depression is common but not present on all specimens. The distinctive holdfasts are preserved in an iron-rich phase, documenting a substitution that has also affected other non-echinoderm calcareous material.
Stars in the Silurian sky: Echinoderm holdfasts from the Carnic Alps / Ferretti, Annalisa; Ausich, William I.; Corradini, Carlo; Corriga, Maria Giovanna; Schönlaub, Hans Peter. - In: GEOLOGICA ACTA. - ISSN 1695-6133. - STAMPA. - 14:4(2016), pp. 335-347. [10.1344/GeologicaActa2016.14.4.1]
Stars in the Silurian sky: Echinoderm holdfasts from the Carnic Alps
FERRETTI, Annalisa;
2016
Abstract
A small collection of echinoderm holdfasts from the Ludlow Cardiola Formation of the Carnic Alps (Austria) contains a wide range of morphologies as a response of environmental adaptation. In general, the holdfasts have a globous and massive dome-like profile with several processes arranged in a sub-radial disposition, so to create a sort of ‘star-like’ outline. A small central depression is common but not present on all specimens. The distinctive holdfasts are preserved in an iron-rich phase, documenting a substitution that has also affected other non-echinoderm calcareous material.File | Dimensione | Formato | |
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