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 Grunow Grunow 1876 [232,634,1700,1725] Bacillariophyceae Asterolampraceae Asteromphalus GBIF,CoL Chromista Asterolamprales 1 2 Ochrophyta species cleveanus   ASTEROLAMPRALES Round & Crawford: Asterolampraceae H.L. Smith. Ref. illus.: Hernández-Becerril 1991, pl. 12, fig. 3 Samples: GU52N-4 Dimensions: Length 42 µm, width 33 µm, areolae 16 in10 µm in the middle of the segment. Diagnostics: One singular ray reaching the center, 9 ordinary rays around it (i.e., 10 segments), the segments attached to the central area by long costae; small areolae. Comments: Record based on one broken LM view found in a turf sample from farmer fish territory but presumably redeposited from the plankton. The shape of the valve and the number of rays distinguishes this species from  A. flabellatus(Brébisson) Greville( Hustedt 1927–1930, fig. 279; Hernández-Becerril 1991, pl. 12, figs 1, 2).