Lyrella aestimata (Hust.) Nevrova, Witkowski, Kulikovskiy & Lange-Bert., 2013

Nevrova, Elena, Witkowski, Andrzej, Kulikovskiy, Maxim, Lange-Bertalot, Horst & Kociolek, J. Patrick, 2013, A revision of the diatom genus Lyrella Karayeva (Bacillariophyta: Lyrellaceae) from the Black Sea, with descriptions of five new species, Phytotaxa 83 (1), pp. 1-38 : 24

Lyrella aestimata (Hust.) Nevrova, Witkowski, Kulikovskiy & Lange-Bert. comb. nov. ( Figs 96–102 )

Basionym: Navicula aestimata Hust. 1964 in Hustedt (1961 –1966: 470; fig. 1529)

Valves circular-elliptic to elliptic with broadly rounded apices, length 21–32 µm, breadth 14–20 µm. Raphe straight, external central endings relatively approximate, axial area narrowly linear, central area relatively large, apically elongate, connected to lateral areas. Lateral areas narrow, convex, terminating below apices, structureless. Transapical striae in the marginal zone radiate, ca. 11–12 in 10 µm, distinctively punctate, areolae ca. 16 in 10 µm.

Distribution:—Marine species usually found in the tropical zone, Indo-Malaysian region ( Hustedt 1961 –1966). Black Sea, Bulgarian ( Temniskova-Topalova & Petrova-Karadjova 1998) and Crimean coasts (Dvujakornaya Bay, Golubaja Bay, Vitino coast) ( Nevrova 2010).

Literature:— Hustedt (1961 –1966: 470; fig. 1529); Simonsen (1987: 487, pl. 744, figs 5–7)

Figures

FIGURES 96–107: Figs. 96–102: Lyrella aestimata comb. nov. Figs 96–101: Valve view, LM, scale bar = 10 µm. Fig. 102: Internal view, SEM, scale bar = 8 µm. Specimens from the Black Sea (Golubaya Bay, Dvujakornaya Bay, Vitino coast). Figs 103–107: Lyrella rudiformis comb. nov., valve view, LM, scale bar = 10 µm. Specimens from the Black Sea (Golubaya Bay, Karadag, Zernov’s Phyllophorae Field).