Mallomonas kuzminii E.S. Gusev & Kulikovskiy, 2013

Gusev, Evgeniy S. & Kulikovskiy, Maxim S., 2013, A new species of the genus Mallomonas (Chrysophyceae: Synurales), Mallomonas kuzminii sp. nov., from lake Frolikha (Russia, Baikal region), Phytotaxa 155 (1), pp. 66-70 : 67

Mallomonas kuzminii E.S. Gusev & Kulikovskiy , sp. nov. ( Figs. 2–11 )

Cells dimensions unknown. Scales tripartite, 3.1–6.4 × 1.9–4.0 µm, with or without dome. Body scales oblong-oval or asymmetric with a narrowed and tapered distal part. Caudal scales with a short spine ( Figs. 6, 12 , 15). Dome with ribs ( Figs. 2–3, 7–8 ) and surrounded by an extension of the anterior rib ( Fig. 8 ). V-rib acute or rounded, hooded ( Figs. 7–11 ), continuous with the anterior submarginal rib. Posterior flange and shield with pores and without a secondary layer. Pores can be evenly spaced on all the surface ( Figs. 2, 6, 7 ) or irregularly distributed on the posterior flange and shield ( Figs. 3- 5, 8-11 ). A patch of small pores is present in the angle of the V-rib ( Figs. 2, 5–6 ). The proximal part of the scale is surrounded by a thin rim. Bristles dentate, curved, with pointed tips, 8–14 µm long ( Figs. 14 , 17). Cyst ca. 18 µm in diameter.

Type: — RUSSIA. Republic of Buryatia: Lake Frolikha , 55° 26’ 15” N, 110° 1’ 16” E, E.S. Gusev s.n. SEM stub 75/1 (holotype IBIW!, Fig. 3 ), sample “Baikal 75”, 26-7-2012, in collection E.S. Gusev .

Distribution:— This species was only found in the type locality.

Etymology:— This species dedicated to G.V. Kuzmin, well-known specialist on algae, one of the first investigators of scaled chrysophytes in East Siberia.

Figures

FIGURES 2–14. Mallomonas kuzminii sp. nov. TEM and SEM images of different types of scales. Figs. 2–3. Two forms of domed scales, TEM. Figs. 4–5. Domeless scales, TEM. Fig. 6. Caudal scale with spine, TEM. Figs. 7–8. Domed scales, SEM. Figs. 9–11, 16. Domeless scales, SEM. Fig. 12, 15 Caudal scale with spine, SEM. Fig. 13: Cyst, covered by scales, SEM. Fig. 14, 17. Bristles, SEM. Scale bars: Figs. 2, 4–5, 13: 2 µm; Figs. 3, 6–12, 14–17: 1 µm.