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) Lobban, Christopher S. Micronesica 2015 2015 2 1 49 W. Gregory W. Gregory [232,586,647,672] Bacillariophyceae Cocconeidaceae Cocconeis GBIF,CoL Chromista Achnanthales 3 4 Ochrophyta species ornata  Samples: GU44AU-2 Dimensions: Length 19 µm, width 15 µm, striae ca 10 in10 µm Diagnostics: SV: striae coarsely uniseriate but sometimes branching towards the margin, striae interrupted by a longitudinal hyaline line; margin with parallel rows of papillae. RVnot seen. Comments: A few specimens in this sample. Gregory (1857)was charmed by the “rich ornate aspect” of this “beautiful” species, which does indeed appear ornate, especially in SEM( Fig. 27). The original drawing did not do it justice.