Rivularia atra Roth ex Bornet & Flahault Trá an Dóilín, an Cheathrú Rua, Conemara; small black hemispherical growths in high-level pools
© Michael Guiry (email@example.com)
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Please do not write to us about Prorocentrum compressum (J.W.Bailey) Abé ex J.D.Dodge, supposedly a dinoflagellate, being a taxonomic synonym of Tryblionella compressa (J.W.Bailey) Poulin, supposedly a diatom. It is indeed an unusual case, but there was a difference of opinion as to the identity of the basionym Pyxidicula compressa J.W.Bailey, some authors treating it as a diatom and other as a dinoflagellate; the consensus now is that it is a diatom.
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