XXX.—On Sellaphora, a new genus of diatoms

The diatom genusSellaphora: Separation fromNavicula

“…During interphase all the Sellaphora species investigated have a single H--shaped plastid consisting of two large plates, which lie against the girdle and the marginal parts of the valves, linked by a narrow isthmus beneath the epivalve (Figs 15, 17, 19, 28;Mann, 1984a). The plastid contains one pyrenoid, which usually lies in one of the plates, beside the isthmus; this was overlooked by Mereschkowsky (1902) and Cox (1981). The pyrenoid is large, tetrahedral, and contains finger-like invaginations (Figs 14,15,28).…”

“…I will refer to this group as Navicula sensu stricto and take it as the reference for comparisons both within Navicula sensu lato and outside, in the Naviculaceae. Sellaphora was first separated from Navieula sensu stricto by Mereschkowsky (1902) because of the different appearance of the "endochrome" (i.e. the plastids) during interphase.…”

Revision of the diatom genus Sellaphora: a first account of the larger species in the British Isles.

“…However, if chloroplast morphology is taken into account, differences between Sellaphora and Navicula species are immediately apparent. This was first noticed by MErEschKowsKy (1902).…”

“…MErEschKowsKy (1902) assigned four species to the genus, two from freshwater -S. pupula and S. laevissima (which he called S. bacilliformis) -and two from the Black Sea -S. borscowii and S. elliptica. The type species is S. pupula (Mann 1989a(Mann , 2001).…”

Morphology and formal description of Sellaphora bisexualis sp. nov. (Bacillariophyta).

“…The genus Sellaphora was described by MErEsChkowsky (1902) and resurrected by Mann (1989), following studies of the frustules, plastids and auxosporulation. The taxonomic history, characteristics and diversity of the genus have recently been reviewed by , who concluded that there are many more species within the genus than the c. 80 that currently have formal binomials.…”