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

Author:

VINN OLEV1,WILSON MARK. A.2,ISAKAR MARE3,TOOM URSULA4

Affiliation:

1. 1 Department of Geology, University of Tartu, Ravila 14A, 50411 Tartu, Estonia

2. 2 Department of Earth Sciences, The College of Wooster, Wooster, Ohio 44691, USA

3. 3 Natural History Museum, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia

4. 4 Department of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia

Abstract

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.

Publisher

Society for Sedimentary Geology

Subject

Paleontology,Ecology, Evolution, Behavior and Systematics

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