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1 June 2014 Asterozoan Pedicellariae and Ossicles Revealed from the Middle Ordovician of Baltica
Oive Tinn, Leho Ainsaar
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Abstract

Isolated asterozoan ossicles and pedicellariae occur in micropalaeontological samples from the Darriwilian (Middle Ordovician) of the Mishina Gora section, north-western Russia. The well-preserved Bursulella unicornis type fossils represent the oldest hitherto record of asterozoan pedicellariae. The accompanying ossicles are not diagnostic but allow their tentative placement within the asteroid stem group. The abundance of disarticulated ossicles in the samples proves that asterozoans were not as rare as they have been considered and were important members of Ordovician ecosystems in the Baltic Palaeobasin.

© 2014 O. Tinn and L. Ainsaar. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Oive Tinn and Leho Ainsaar "Asterozoan Pedicellariae and Ossicles Revealed from the Middle Ordovician of Baltica," Acta Palaeontologica Polonica 59(2), 353-358, (1 June 2014). https://doi.org/10.4202/app.2012.0034
Received: 12 March 2012; Accepted: 8 March 2013; Published: 1 June 2014
KEYWORDS
Asteroidea
Baltica
Bursulella
Echinodermata
Ordovician
pedicellariae
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