TABLE 2 in Prestauroneis dayaensis-a new diatom species (Bacillariophyceae: Stauroneidaceae) from Guangdong Province, China

TABLE 2. Morphological characteristics of Prestauroneis dayaensis sp. nov. and morphologically related species.OutlineApicesAxial areaCentral areaValve length (μm)Valve width (μm)Striae in 10 μmAreolae in 10 μmDistributionReferenceP. dayaensis sp. nov.Elliptical to lanceolate-elliptical and slightly convex marginsProtracted, abruptly short-rostrate endsNarrow, linearNearly rectangular25.5–32.08.0–11.518–2037–40Danao River in Daya Bay, Huizhou City, This study Guangdong Province, ChinaP. genkalii Glushchenko, Kulikovskiy & Kociolek (2019: 157)Lanceolate to lanceolate-ellipticalAcutely roundedNarrow, linearSmall, rounded27.0–62.08.0–10.515–1736–40Nam Hinboun River near Kong Lor Cave, Vientiane province, LaosGlushchenko et al., 2019P. pseudocrucicula (Kobayasi) Glushchenko, Kulikovskiy & Kociolek (2019: 160)Lanceolate-ellipticalSubrostrateNarrow, linearDistinct moderately widened to suborbicular in shape36.5–46.59.0–11.514–18 in the middle and 22–24 towards the endsNot givenHozoji-numa, Hanyu City, Saitama Prefecture, JapanKobayasi & Ando, 1975P. blazenciciae Metzeltin, D. & H. Lange-Bertalot (2016: 1483)LanceolateObtusely rounded, hardly perceptible short–protractedLinearSmall, set off, approximately circular to somewhat irregularly shaped30.5–57.09.8–13.01924Saline spring in Wisselsheim, Bad Nauheim, Hesse, GermanyMetzeltin & Lange-Bertalot, 2016P. bondarenkoae Vishnjakov (2016: 1483)Lanceolate to lanceolate-ellipticalBroadly rounded or slightly protractedVery narrowSmall, rounded24.0–39.06.0–8.017.5–20 at the apices, 16–18 near the central areaNot givenKhövsgölLake, MongoliaVishnyakov, 2016P. crucicula (W. Smith) Genkal & Yarushina (2017: 358)Elliptical to lanceolate-ellipticalSlightly beak–shaped, obtuseNarrowSlightly expanded31.0–100.010.0–24.412–24 at the apices, 10–16 near the 20–35 central areaHolarticGenkal & Yarushina, 2017P. integra (W.Smith) Bruder (2008: 325)Lanceolate to lanceolate-ellipticalBeak–like, widely roundedNarrowSmall, elliptic-lanceolate25.0–43.08.0–12.015–22 at the apices, 9–15 near the central areaNot givenHolarticKulikovskiy et al. 2016P. lowei Q.Liu, Q.X.Wang & Kociolek (2015: 135)Lanceolate to lanceolate-ellipticalRostrate to sub–capitateNarrow, linearSmall, elliptic-lanceolate25.9–28.47.3–4.8Central striae13–16; distal striae22–24Not givenZoigê Wetland, Sichuan Province, ChinaLiu et al. 2015P. nenwae Q.Liu, Q.X.Wang & Kociolek (2015: 134)Lanceolate to lanceolate-ellipticalAcutely roundedNarrow, linearSmall, elliptic-lanceolate22.8–33.88.6–9.0Central striae 17–18; distal striae 22–24Not givenZoigê Wetland, Sichuan Province, ChinaLiu et al. 2015P. protracta (Grunow) Kulikovskiy & Glushchenko (2016: 419)Lanceolate-elliptical to ellipticNot protracted, very slightly subcapitateG through subrostrate, to broadly rostrate, flatGroundedNarrowSmall, rounded17.0–60.05.0–10.014–20Not givenHolarticKulikovskiy et al., 2016P. protractoides (Hustedt) Q.Liu & Kociolek (2015: 137)LinearSlightly drawn-out, broadly rounded or subcapitateNarrowSmall17.0–19.04.0–5.020 at the center to 28 closes to the polesNot givenHolarticKulikovskiy et al., 2016P. tumida Z. Levkov (2011: 11)Linear-lanceolate to elliptic-lanceolateProtracted to subprotracted, broadly roundedNarrow, linearNot expressed to small lanceolate or elliptic22.0–44.09.0–11.014–17Not givenLake Ohrid, MacedoniaLevkov & Williams, 2011......continued on the next page