Table 2 in Marine and brackish Luticola D. G. Mann (Bacillariophyta) species from the Java Sea and South China Sea coasts with the description of three new species

Table 2. Morphological characteristics of all Luticola taxa listed here with comparisons to most similar brackish taxa based on literature data. Data marked with an asterisk (*) are obtained from photomicrographs.
Size [μm] Length/WidthStriae [in 10 μm]Areolae characteristicProximal raphe endingsDistal raphe endingsDistributionReferencesL. orientalis sp. nov.9.5-22.1/5.4-8.518-224-6 per striae, round or slightly elongatedslightly deflected, close to each otherhookedJava, Hainan Island, Vietnamthis studyL. cribriareolata sp. nov.9.8-28.3/6.0-11.614-163-5 per striae, with deeply positioned cribrumslightly deflected with long irregular thread-like grooveshookedJavathis studyL. halongiana sp. nov.9.9-22.1/5.4-7.720-243-4(5) per striae, round or slightly elongatedstrongly deflected with small rounded groovehookedVietnam, Javathis studyL. belawanensis8.4-19.0/6.1-9.018-213-4(5) per striae mainly slightly elongatedbent with small C-shaped or irregular grooveshookedVietnamthis study15.5-27.0/15.5-2718-203-4 per striaeDeflected-SumatraLevkov et al. 20139-29/5-1018-193-5 per striae*--VietnamGlushchenko et al. 2017L. celebesica10.6-27.1/7.3-13.117-194-6 per striaeDeflectedhookedVietnamthis study11.5-39.0/11.5-39.018-21(4)5-6 per striaedeflectedhookedSulawesiLevkov et al. 2013L. nosybeana9-27/6.0-10.520-244-5 per striae, round to ellipticwith irregular “insect-antennae-like” or “butterfly-like” grooveshookedMadagascarBąk et al. 2019L. madagascarensis13.0-22.5/6.0-7.520-243-4 per striae, round to elliptic or slit-likewith L-shaped grooveshookedMadagascarBąk et al. 2019L. inserata12.2-33.5/8.2-14.015-204-5 per striae, round to elongated with small spines on marginbent with irregular thread-like grooveshookedVietnamthis study23-28/1218---SumatraHustedt 195518-28/10.0-13.516-195-6 per striae, round to elongateddeflectedhookedIndonesia, AustraliaLevkov et al. 201315-25/9-12204-6 per striae, round to elongated*--VietnamGlushchenko et al. 2017L. seposita16.8-24.4/9.5-12.414-174-5 per striae, round to slightly elongated areolaebent, with small C-shaped grooveshookedHainan Islandthis study23/1116-18-bentbent slightly S-shapedSulawesiHustedt 194218-24/10-1218-214-5 per striae, transapically elongatedHook-shapedhooked-Levkov et al. 2013L. tropica11.8-21.2/7.5-11.117-204-5 per striaeclearly bent with long irregular thread-like grooveshookedHainan Island, Vietnamthis study12-22/7-920---South AfricaCholnoky 196015.5-24.0/8-11-520-244-5 per striae, round to transversally elongatedBent and expanded into central poreshooked-Levkov et al. 201311-24/7-920-244-5 per striae*--VietnamGlushchenko et al. 20178.8-19.8/6.3-10.316-184-5 per striae, round or slightly elongated*slightly deflected with long irregular thread-like grooves*hooked*BrazilStraube et al. 2017

表2 基于文献数据，列出所有鞘羽纹藻属（Luticola）类群的形态学特征，并与相似度最高的咸淡水生类群进行对比。标有星号（*）的数据来源于显微照片。

尺寸[μm]、长度/宽度、每10μm内的横线纹数、点纹特征、近端壳缝末端、远端壳缝末端、分布区域、参考文献

1. 东方鞘羽纹藻（新种，L. orientalis sp. nov.）：9.5-22.1/5.4-8.5；18-22；每横线纹具4-6个点纹，呈圆形或稍延长形；近端壳缝末端稍偏斜，彼此靠近；远端壳缝末端呈钩状；爪哇岛、海南岛、越南；本研究
2. 筛点鞘羽纹藻（新种，L. cribriareolata sp. nov.）：9.8-28.3/6.0-11.6；14-16；每横线纹具3-5个点纹，点纹具深位筛膜；近端壳缝末端稍偏斜，具长不规则线状凹槽；远端壳缝末端呈钩状；爪哇岛；本研究
3. 下龙湾鞘羽纹藻（新种，L. halongiana sp. nov.）：9.9-22.1/5.4-7.7；20-24；每横线纹具3-4(5)个点纹，呈圆形或稍延长形；近端壳缝末端强偏斜，具小圆形凹槽；远端壳缝末端呈钩状；越南、爪哇岛；本研究
4. 别拉万鞘羽纹藻（L. belawanensis）：
- 8.4-19.0/6.1-9.0；18-21；每横线纹具3-4(5)个点纹，以稍延长形为主；近端壳缝末端弯曲，具小C形或不规则凹槽；远端壳缝末端呈钩状；越南；本研究
- 15.5-27.0/15.5-27；18-20；每横线纹具3-4个点纹；近端壳缝末端偏斜；苏门答腊；Levkov et al. 2013
- 9-29/5-10；18-19；每横线纹具3-5个点纹*；——；——；越南；Glushchenko et al. 2017
5. 西里伯斯鞘羽纹藻（L. celebesica）：
- 10.6-27.1/7.3-13.1；17-19；每横线纹具4-6个点纹；近端壳缝末端偏斜；远端壳缝末端呈钩状；越南；本研究
- 11.5-39.0/11.5-39.0；18-21(4)；每横线纹具5-6个点纹；近端壳缝末端偏斜；远端壳缝末端呈钩状；苏拉威西岛；Levkov et al. 2013
6. 诺西贝鞘羽纹藻（L. nosybeana）：9-27/6.0-10.5；20-24；每横线纹具4-5个点纹，呈圆形至椭圆形；近端壳缝末端具不规则“昆虫触角状”或“蝴蝶状”凹槽；远端壳缝末端呈钩状；马达加斯加；Bąk et al. 2019
7. 马达加斯加鞘羽纹藻（L. madagascarensis）：13.0-22.5/6.0-7.5；20-24；每横线纹具3-4个点纹，呈圆形至椭圆形或缝状；近端壳缝末端具L形凹槽；远端壳缝末端呈钩状；马达加斯加；Bąk et al. 2019
8. 弯曲鞘羽纹藻（L. inserata）：
- 12.2-33.5/8.2-14.0；15-20；每横线纹具4-5个点纹，呈圆形至延长形，边缘具小棘；近端壳缝末端弯曲，具不规则线状凹槽；远端壳缝末端呈钩状；越南；本研究
- 23-28/12；18；——；——；——；苏门答腊；Hustedt 1955
- 18-28/10.0-13.5；16-19；每横线纹具5-6个点纹，呈圆形至延长形；近端壳缝末端偏斜；远端壳缝末端呈钩状；印度尼西亚、澳大利亚；Levkov et al. 2013
- 15-25/9-12；20；每横线纹具4-6个点纹，呈圆形至延长形*；——；——；越南；Glushchenko et al. 2017
9. 分隔鞘羽纹藻（L. seposita）：
- 16.8-24.4/9.5-12.4；14-17；每横线纹具4-5个点纹，点纹呈圆形至稍延长形；近端壳缝末端弯曲，具小C形凹槽；远端壳缝末端呈钩状；海南岛；本研究
- 23/11；16-18；——；近端壳缝末端弯曲；远端壳缝末端稍呈S形弯曲；苏拉威西岛；Hustedt 1942
- 18-24/10-12；18-21；每横线纹具4-5个点纹，跨顶轴延长形；近端壳缝末端钩形；远端壳缝末端呈钩状；——；Levkov et al. 2013
10. 热带鞘羽纹藻（L. tropica）：
- 11.8-21.2/7.5-11.1；17-20；每横线纹具4-5个点纹；近端壳缝末端明显弯曲，具长不规则线状凹槽；远端壳缝末端呈钩状；海南岛、越南；本研究
- 12-22/7-9；20；——；——；——；南非；Cholnoky 1960
- 15.5-24.0/8-11.5；20-24；每横线纹具4-5个点纹，呈圆形至横向延长形；近端壳缝末端弯曲并扩展为中央孔；远端壳缝末端呈钩状；——；Levkov et al. 2013
- 11-24/7-9；20-24；每横线纹具4-5个点纹*；——；——；越南；Glushchenko et al. 2017
- 8.8-19.8/6.3-10.3；16-18；每横线纹具4-5个点纹，呈圆形或稍延长形*；近端壳缝末端稍偏斜，具长不规则线状凹槽*；远端壳缝末端呈钩状*；巴西；Straube et al. 2017