Plagiogramma atomus Greville, 1863

Lobban, Christopher S., 2015, Benthic marine diatom flora of Guam: new records, redescription of Psammodictyon pustulatum n. comb., n. stat., and three new species (Colliculoamphora gabgabensis, Lauderia excentrica, and Rhoiconeis pagoensis), Micronesica 2015 (2), pp. 1-49 : 11

Plagiogramma atomus Greville Fig. 106

Ref. illus.: Ricard 1977 pl. 10, fig. 10; Witkowski et al. pl. 3, figs 7, 8; Hein et al. 2008, pl. 4, figs 9,10

Samples: GU44L-E

Dimensions: Length 25–28 µm, width 13–14 µm; striae ca. 11 in 10 µm

Diagnostics: The bilobed outline together with the dimensions define this species.

Comments: Larger and more finely areolate than a more common, so far unidentified specimens close to P. bilobatum . Reported for Guam by Arai (2010, pl. 8, fig. 2).