Talaroneis sp.

Park, Joon Sang, Lobban, Christopher S. & Lee, Kyun-Woo, 2018, Diatoms associated with seaweeds from Moen Island in Chuuk Lagoon, Micronesia, Phytotaxa 351 (2), pp. 101-140 : 105-106

9. Talaroneis sp. Figs 9, 10

Samples: Moen1_ Halimeda, Moen 1_ Sargassum

Dimensions: 32.2–37.1 μm long, 7.8–8.1 μm wide; 26 striae in 10 μm, 27 areolae in 10 μm apically.

Diagnostics: Valves linear-lanceolate with rostrate apices, with subapical furrow characteristic of the genus, but with a strauros and possibly a septum in the central area.

Comments: This combination of Talaroneis and Plagiogramma characters is quite unlike any of the three Talaroneis species described so far ( Kooistra et al. 2004), ( Li et al. 2015) and this is almost certainly a new species. Stidolph et al. (2012), pl. 43, fig. 121; pl. 54, fig. 28) also shows valves with this combination of characters but they are strongly constricted; He identifies it “with some doubt” as Glyphodesmis nancoorense (Grunow) Kolbe but as with ours, the subapical furrows are very clear.

Figures

FIGURES 9–22. Eleven diatom species of Urneidophycidae and Fragilariophycidae. Figs 9 and 10. Talaroneis sp. Fig. 11. Plagiogramma cf. pulchellum. Fig. 12. Psammodiscus nitidus. Fig. 13. Cyclophora tenuis. Fig. 14. Bleakeleya notata. Figs 15 and 16. Tabularia parva. Figs 17 and 18. Hyalosynedra laevigata. Fig. 19. Podocystis spathulata. Fig. 20. Neofragilaria anomala. Fig. 21. Opephora sp. Fig. 22. Grammatophora marina. Scale bar = 10 μm.