FIG. 2 in Rise of subgen. Rhoicosphenula Lange-Bert. to the genus level, and description of a new Gomphosphenia s.s. species from Puerto Rico

FIG. 2. — LM micrographs of the generitype species (R. paradoxa) of Rhoicosphenula Lange-Bert., Kociolek, A.A.Saber & Cantonati, stat. nov., depicting the valve size-diminution series in valve (A-F) and girdle view (G-I); G undergoing division process) of the holotype specimens. Note the pseudosepta at the head- and footpole, the proximal raphe pores which are well separated and broadened (A-F) whilst the internal endings are closer to each other (see e.g., bright contours in B). Scale bar: 10 μm. From Lange-Bertalot (1995) mod.