NEW BIOCLAUSTRATION OF A SYMBIONT IN THE MANTLE CAVITY OF CLITAMBONITES SCHMIDTI (BRACHIOPODA) FROM THE SANDBIAN (UPPER ORDOVICIAN) OF ESTONIA

Abstract: A new bioclaustration of a symbiont is here described from the mantle cavity of the strophomenatan brachiopod Clitambonites schmidti. It is the second bioclaustration in brachiopods known from the Kukruse Regional Stage (Sandbian) of Estonia. It shares affinities with the bioclaustrations Burrinjuckia and Haplorygma. The outgrowth in the ventral valve interior was secreted by the brachiopod around a symbiont. Most likely the symbiont was a suspension feeder that collected food particles from the brachiopod's mantle cavity. The symbiont was either a kleptoparasite or fed on the brachiopod's feces (coprophagy). The majority of symbiosis cases in brachiopods in the Ordovician of Baltica involve clitambonitids as the hosts. Thus, clitambonitid brachiopods were more likely hosts for symbiosis than other brachiopods in the Ordovician of Baltica.

[1]  K. De Baets,et al.  Phanerozoic parasitism and marine metazoan diversity: dilution versus amplification , 2021, Philosophical Transactions of the Royal Society B.

[2]  K. De Baets,et al.  The Fossil Record of Parasitism: Its Extent and Taphonomic Constraints , 2021, Topics in Geobiology.

[3]  The Evolution and Fossil Record of Parasitism: Coevolution and Paleoparasitological Techniques , 2021, Topics in Geobiology.

[4]  Colin D. Sproat,et al.  Early parasitic drilling in a rhynchonelliform brachiopod Rongatrypa xichuanensis from the Katian (Upper Ordovician) of central China , 2020, Journal of Paleontology.

[5]  A. Eisenhauer,et al.  Terebratulide brachiopod shell biomineralization by mantle epithelial cells. , 2019, Journal of structural biology.

[6]  O. Vinn,et al.  Ordovician and Silurian ichnofossils from carbonate facies in Estonia: A collection-based review , 2019, Palaeoworld.

[7]  K. De Baets,et al.  Trace Fossil Evidence of Trematode-Bivalve Parasite-Host Interactions in Deep Time. , 2015, Advances in parasitology.

[8]  P. Taylor.  Differentiating Parasitism and Other Interactions in Fossilized Colonial Organisms. , 2015, Advances in parasitology.

[9]  Mark A. Wilson,et al.  Earliest rhynchonelliform brachiopod parasite from the Late Ordovician of northern Estonia (Baltica) , 2014 .

[10]  T. Torsvik,et al.  Chapter 2 New global palaeogeographical reconstructions for the Early Palaeozoic and their generation , 2013 .

[11]  E. Schwab,et al.  Current Usage of Symbiosis and Associated Terminology , 2012 .

[12]  O. Vinn,et al.  Diverse early endobiotic coral symbiont assemblage from the Katian (Late Ordovician) of Baltica , 2012 .

[13]  Mark A. Wilson,et al.  The First Jurassic Thecideide Brachiopods from the Middle East: a New Species of Moorellina from the Upper Callovian of Hamakhtesh Hagadol, Southern Israel , 2011 .

[14]  M. Zapalski.  Is absence of proof a proof of absence? Comments on commensalism , 2011 .

[15]  Sun Yuan-lin,et al.  Tubular Shell Infestations in Some Mississippian Spirilophous Brachiopods , 2010 .

[16]  M. Zapalski,et al.  First fossil record of parasitism in Devonian calcareous sponges (stromatoporoids) , 2010, Parasitology.

[17]  M. Zapalski.  PARASITISM VERSUS COMMENSALISM: THE CASE OF TABULATE ENDOBIONTS , 2007 .

[18]  Olev Vinn,et al.  The distribution of worm borings in brachiopod shells from the Caradoc Oil Shale of Estonia. , 2005 .

[19]  L. Holmer,et al.  THE OLDEST-KNOWN METAZOAN PARASITE? , 2004, Journal of Paleontology.

[20]  O. Vinn.  The earliest known Trypanites borings in the shells of articulate brachiopods from the Arenig (Ordovician) of Baltica , 2004, Proceedings of the Estonian Academy of Sciences. Geology.

[21]  D. Harper,et al.  Diversification patterns in the clitambonitoid brachiopods of the Ordovician of Baltoscandia , 2003 .

[22]  M. Zuykov,et al.  New species of Estlandia (Clitambonitidina, Brachiopoda) in the Upper Ordovician of the East Baltic , 2002, Proceedings of the Estonian Academy of Sciences. Geology.

[23]  O. Tinn.  THE ORDOVICIAN CLITAMBONITIDINE BRACHIOPOD GENUS VELLAMO IN ESTONIA , 1998, Proceedings of the Estonian Academy of Sciences. Geology.

[24]  L. Popov,et al.  BRACHIOPODS OF THE SUBFAMILY ATELELASMATINAE (CLITAMBONITACEA) FROM THE ARENIG, ORDOVICIAN, OF THE BALTIC KLINT AREA , 1994, Proceedings of the Estonian Academy of Sciences. Geology.

[25]  Mark A. Wilson,et al.  Parasitism of Ordovician bryozoans and the origin of pseudoborings , 1988 .

[26]  G. Biernat.  Diorygma atrypophilia n. gen., n. sp. - a parasitic organism of Atrypa zonata Schnur , 1961 .