New information on Oelandia (Mollusca) from the Middle Cambrian of Sweden
- 31 December 1987
- journal article
- Published by Geological Society of Denmark in Bulletin of the Geological Society of Denmark
- Vol. 36, 263-273
- https://doi.org/10.37570/bgsd-1988-36-08
Abstract
Additional specimens of Oelandia pauciplicata Westergard, 1936 from Oland, Sweden, confirm that this Middle Cambrian mollusc is asymmetrical in developing comarginal plications alternately on its lateral flanks. The specimens also show that at a late growth stage the species developed a tube near the apertural margin, below the overhanging apex, a feature not recorded in the orginal description. Oelandia is removed from the synonymy list of Latouchella Cobbold, 1921. The form and function of the alternating comarginal plications and the sub-apical tube are discussed.Keywords
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