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Article: A new cyclocystoid from the Lower Ordovician of Öland, Sweden

Publication: Palaeontology
Volume: 30
Part: 1
Publication Date: March 1987
Page(s): 105 116
Author(s): Vivianne Berg-Madsen
Addition Information

How to Cite

BERG-MADSEN, V. 1987. A new cyclocystoid from the Lower Ordovician of Öland, Sweden. Palaeontology30, 1, 105–116.

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The Palaeontological Association (Free Access)


Monocycloides oelandicus gen. et sp. nov. is described from upper Arenig age beds on Oland, Sweden (Volkhov Stage, Langevoja Substage). The genus is monotypic and is the earliest known cyclocystoid echinoderm. Palaeogeographical origins of the cyclocystoids remain uncertain, but Monocycloides is regarded as a primitive sister group of the North American Ordovician Cyclocystoides.
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