Table 2 Summary of the major characteristic features observable with EM used in this study to distinguish between taxa of the section Petersenianae
From: Newly recorded species of the genus Synura (Synurophyceae) from Korea
Taxon | Cell size (μm) | Scale size (μm) | Base plate hole size (μm) | Number of struts | Distance of struts (μm) | Interconnection of struts by transverse folds | Other |
|---|---|---|---|---|---|---|---|
S. americana Kynčlová & Škaloud | 22–28 × 8–12 | *3.0–4.2 × 1.7–2.3 | 0.08–0.27 | 21–24 | 0.27–0.30 | Almost never interconnected | Occasional triangular shape of the keel |
S. conopea Kynčlová & Škaloud | 20–28 × 8–12 | *3.3–4.1 × 1.4–1.9 | 0.19–0.32 | 24–30 | 0.23–0.26 | Usually not interconnected | Large and closely arranged keel pores |
S. glabra Korshikov emend. Kynčlová & Škaloud | 19–28 × 10–14 | *2.4–3.4 × 1.5–2.4 | 0.14–0.32 | 17–22 | 0.25–0.29 | Never interconnected | With a small, narrow and sometimes bent keel |
S. petersenii Korshikov emend. Škaloud & Kynčlová | 20–31 × 8–12 | *3.6–4.6 × 1.8–2.3 | 0.24–0.36 | 26–34 | 0.24–0.28 | Mainly interconnected | Large scale dimensions, common presence of transverse folds |
S. truttae (Siver) Škaloud & Kynčlová | 22–31 × 11–13 | *3.3–3.8 × 1.5–1.8 | 0.32–0.56 | 27–33 | 0.19–0.24 | Mainly interconnected | Keel tip has several (two to four) very short teeth on its top end and large base plate hole |