Synura korshikovii D. Kapustin et E.S. Gusev, 2015

Kapustin, Dmitry A. & Gusev, Evgeniy S., 2015, Synura korshikovii sp. nov. (Chrysophyceae, Synurales), a new species from Ukraine, Phytotaxa 233 (2), pp. 185-190 : 186

Synura korshikovii D. Kapustin et E.S. Gusev sp. nov. ( Figs. 1–25 )

Colony dimensions unknown. Body scales oval, 4.0–4.9 × 2.4–3.1 μm, with an upturned edge encircling approximately ¾ of scale perimeter. Spine clavate or cylindrical, 1.5–2.0 × 0.57–0.79 μm, with flat apex terminating in 2–3 rows of rounded teeth. Whole scale covered with meshwork and each mesh includes a pore. The secondary layer surrounds the base of the spine and consists of numerous struts. Transition scales similar to the body scales but narrower (2.3–5.5 × 1.1–2.5 μm). Caudal scales ovate, elliptical to roundish, surrounded by uninterrupted upturned edge (2.3–4.1 × 2.1–3.1 μm); basal plate covered in a meshwork with pores. Stomatocysts unknown.

Type (designed here): SEM stub PPZ-7 (holotype: Fig. 2 ) deposited at the I.D. Papanin Institute for Biology of Inland Waters Russian Academy of Sciences, Russia.

Type locality: UKRAINE: Zhytomyr Region, Ovruch District, Polisky Nature Reserve, env. of Selezivka, pond on Bolotnytsya river. 51.536074 N, 28.103102 E, 25 March 2015, leg. D.A. Kapustin.

Etymology. The epithet is dedicated in honour of the prominent Ukrainian phycologist Alexander A. Korshikov (1889–1945) who made the first revision of the genus Synura .

Occurrence. Besides the type locality, S. korshikovii also occurs in the pond “Hrybove Lake” situated in the buffer zone of PNR.

Figures

FIGURES 1–13. Synura korshikovii. TEM images of scales of different types. Figs. 1–4. Body scales. Fig. 5. Roundish caudal (top left corner) and body (bottom right corner) scales. Fig. 6. Ovate caudal (bottom left corner) and transition (top right corner) scales. Fig. 7. Transition scale with long spine.Figs.8, 9. Roundish caudal scales. Fig. 10. Transition scale with reduce spine. Fig. 11. Elliptical caudal scale. Fig. 12. Transition scale. Fig. 13. Group of scales of different types. Scale bars: Figs. 1, 2, 4–12: 2 μm; Fig. 3: 1 μm; Fig. 13: 5 μm.

FIGURES 14–25. Synura korshikovii. SEM images of scales of different types. Figs. 14–18. Body scales. Fig. 19. Transition scale. Fig. 20. Elliptical caudal scale. Fig. 21. Body scale (bottom left corner) and three caudal scales of different shape. Figs. 23, 24. Caudal scales. Fig. 25. Two cells with the scales on the surface. Scale bars: Figs. 14–24: 1 μm; Fig. 25: 5 μm.