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A radical, novel design for a free-living bryozoan colony: Biselenaria placentula (Reuss, 1867)

Published online by Cambridge University Press:  16 June 2020

Eckart Håkansson Open the ORCID record for Eckart Håkansson [Opens in a new window]  and
Kamil Zágoršek Open the ORCID record for Kamil Zágoršek [Opens in a new window]
Eckart Håkansson
Affiliation:
The University of Western Australia, School of Earth Sciences, CEG, 35 Stirling Highway, WA6009, Australia
Kamil Zágoršek
Affiliation:
Department of Geography, Technical University of Liberec, Studentská 2, CZ-461 17 Liberec, Czech Republic
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Abstract

A series of well-preserved specimens of the little-known Palaeogene species Biselenaria placentula (Reuss, 1867) warrant the designation of a new family of free-living cheilostome bryozoans, Biselenariidae n. fam. In contrast to the structural organization of all other free-living, lunulitiform cheilostomes, all zooids are enclosed almost completely by cuticular, exterior walls. Yet, like other lunulitiforms, the colony must be regarded as a highly integrated functional unit, as revealed through the unique, highly complex interior architecture. In creating the new monotypic family, the type species Biselenaria placentula is described in detail, while the ambiguous taxonomic status of the only other taxon, B. offa Gregory, 1893, is discussed.

UUID: http://zoobank.org/6ad8a795-c45e-4619-b2bb-46916585fbd9

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Articles
Information
Journal of Paleontology , Volume 94 , Issue 6 , November 2020 , pp. 1059 - 1075
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Copyright © 2020, The Paleontological Society

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