Pseudictyota bicornis (Cleve) P.A.Sims & D.M.Williams

Lobban, Christopher S. & Witkowski, Andrzej, 2023, Marine benthic diatoms of Guam: new records, Dictyoneis apapae sp. nov., and updates to the checklist, Micronesica 2023 (2), pp. 1-75 : 15

Pseudictyota bicornis (Cleve) P.A.Sims & D.M.Williams Figs 91–93

Ref. illus.: Cleve 1878, fig. 30; Ashworth et al. 2013, fig 7b; Sims et al. 2018, figs 133–138

Sample: GU52U-1

Dimensions: 51 µm long (on the axis with the ocelli), 42 µm wide

Diagnostics: Quadrate, false pseudoloculate valve, having two elevations with ocelli and two unelevated points with rimoportulae.

Comments: Differing from Pseudictyota dubia (Brightwell) P.A.Sims & D.M.Williams ( Navarro & Lobban 2009, figs 21–24), which has six angles, three with ocelli and three with rimoportulae; and from P. reticulata (Roper) P.A.Sims & D.M.Williams ( Lobban et al. 2012, pl. 3, figs 3, 4, as Triceratium dictyotum P.A.Sims & R.Ross ), which is broadly lanceolate with two angles each with both an ocellus and a rimoportula.