TABLE 1 in Ultrastructure of four Surirella taxa (Bacillariophyceae) from Qinghai Province, northwest China, with reference to the characteristics of portulae

TABLE 1. Comparison of Surirella species discussed in this work.
FeatureS. liubingiiS. minutaS. minutaS. minutaS. lacrimulaS. lacrimulaS. brebissonii var. kuetzingiiS. brebissonii var. kuetzingiiS. brebissonii var. kuetzingiiReferenceThis paperThis paperEnglish & Potapova 2012Krammer & Lange- Bertalot 1987This paperEnglish & Potapova 2012This paperEnglish & Potapova 2012Krammer & Lange- Bertalot 1987Valve outlineLong-ovate to ovateLong-ovate to ovateLong-ovate to ovateLong-ovate to ovateOvateOvateOvate to ellipticalOvate to ellipticalOvate to ellipticalValve length (L) and width (W) (μm)L: 22–33 W: 8.5–9.9L: 20–46 W: 8.4–11.0L: 16–36 W: 9–11No dataL: 24–34 W: 10.3–13.1L: 19–30 W: 10–13L: 14–25 W: 6.9–8.8L: 13–56 W: 10–24L: 8–36 W: 8–18Stria type and densityMultiseriate, composed of 3 or 4 rows of areolae, 24–26 in 10 μmMultiseriate, composed of 3–5 rows of areolae, 25–27 in 10 μmMultiseriate, 28–30 in 10 μmNo dataMultiseriate, composed of 3 or 4 row areolae, 30–32 in 10 μmMultiseriate, composed of 3 or 4 row areolae, 27–33 in 10 μmMultiseriate, composed of 3–5 rows of areolae, 23–25 in 10 μmMultiseriate, composed of 3–5 rows of areolae, 18–23 in 10 μmNo dataCosta-stria bundles (CSBs) and its compositionDistinct, each CSB mostly composed of 3 costae and 4 striaePresent, each CSB mostly composed of 3 costae and 4 striae, or 2 costae and 3 striaeNo dataNo dataDifficult to distinguish because CSBs not elevated from over-fibula costaDifficult to distinguish because CSBs not elevated from over-fibula costaPresent, each CSB often composed of 3 costae and 4 striaeNo dataNo dataOver-fibula costa (OFC)DistinctDiscernibleNo dataNo dataDifficult to distinguishDifficult to distinguishDiscernibleNo dataNo dataFibulae and its densityRobust, extended to valve midline, 6–7 in 10 μmMedium-sized, extended to valve midline, 7–9 in 10 μmSpanning c. 1/4 of valve width, 7–8 in 10 μmNo dataShort, spanning c. 1/4 of valve width, 7–9 in 10 μmShort, spanning c. 1/4 of valve width, 6–8 in 10 μmShort, spanning c. 1/4 of valve width, 6–8 in 10 μmShort, spanning c. 1/4 of valve width, 5, 6, or 8 in 10 μmShort, spanning c. 1/4 of valve widthNumber of portulae11No data1 (see fig. 71)1–31–3333 (see fig. 52)“Pseudoseptum”Present, distinctAbsentNo dataNo dataAbsentAbsentAbsentAbsentAbsent (see fig. 52)