Amphidiniopsis sibbaldii sp. nov. (Thecadiniaceae, Dinophyceae), a new freshwater sand-dwelling dinoflagellate

TitleAmphidiniopsis sibbaldii sp. nov. (Thecadiniaceae, Dinophyceae), a new freshwater sand-dwelling dinoflagellate
Publication TypeJournal Article
Year of Publication1998
AuthorsNicholls K
JournalPhycologia
Volume37
Pagination334-339
Abstract

A previously undescribed species of Amphidiniopsis, A. sibbaldii sp. nov. (Thecadiniaceae, Dinophyceae), was found in the interstitial water of a freshwater sandy beach on Lake Simcoe (Sibbald Point Provincial Park, Ontario, Canada). It is the only known freshwater member of this genus. Identification is possible by light microscopy of suitably prepared cells owing to the distinctive and well-developed thecal plate structure. As is characteristic of the genus, the cingulum has a premedian position resulting in a hypotheca-to-epitheca height ratio of about 4 : 1. The thecal plate formula is: Po, 4′, 3a, 7″, 5c, 4s, 5′″, 2″″. The main features distinguishing A. sibbaldii from its most similar ‘relative’, A. kofoidii Woloszyńska emend. Dodge & Lewis (a marine species), are the shape and arrangement of hypothecal and sulcal plates.

URLhttp://dx.doi.org/10.2216/i0031-8884-37-5-334.1
DOI10.2216/i0031-8884-37-5-334.1
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