Notes on the diatom collection of the Natural History Museum, London (BM) IX: Campylodiscus hardmanianus, with a discussion on synapomorphy and the poverty of molecular monophyly

Abstract

Type specimens of Campylodiscus hardmanianus and Campylodiscus hardmanianus var. grovii are discussed. The general purpose of this contribution is twofold: (1) to draw attention to some Greville types that reside in Deby’s collection in BM; and (2) as both taxa should be placed in Coronia, the status of that genus is discussed with respect to the concept of synapomorphy and monophyly.