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/Width	Striae [in 10 μm]	Areolae characteristic	Proximal raphe endings	Distal raphe endings	Distribution	References
L.orientalis sp. nov.	9.5–22.1/5.4–8.5	18–22	4–6 per striae, round or slightly elongated	slightly deflected, close to each other	hooked	Java, Hainan Island, Vietnam	this study
L.cribriareolata sp. nov.	9.8–28.3/6.0–11.6	14–16	3–5 per striae, with deeply positioned cribrum	slightly deflected with long irregular thread-like grooves	hooked	Java	this study
L.halongiana sp. nov.	9.9–22.1/5.4–7.7	20–24	3–4(5) per striae, round or slightly elongated	strongly deflected with small rounded groove	hooked	Vietnam, Java	this study
L.belawanensis	8.4–19.0/6.1–9.0	18–21	3–4(5) per striae mainly slightly elongated	bent with small C-shaped or irregular grooves	hooked	Vietnam	this study
	15.5–27.0/15.5–27	18–20	3–4 per striae	Deflected	–	Sumatra	Levkov et al. 2013
	9–29/5–10	18–19	3–5 per striae*	–	–	Vietnam	Glushchenko et al. 2017
L.celebesica	10.6–27.1/7.3–13.1	17–19	4–6 per striae	Deflected	hooked	Vietnam	this study
	11.5–39.0/11.5–39.0	18–21	(4)5–6 per striae	deflected	hooked	Sulawesi	Levkov et al. 2013
L.nosybeana	9–27/6.0–10.5	20–24	4–5 per striae, round to elliptic	with irregular “insect-antennae-like” or “butterfly-like” grooves	hooked	Madagascar	Bąk et al. 2019
L.madagascarensis	13.0–22.5/6.0–7.5	20–24	3–4 per striae, round to elliptic or slit-like	with L-shaped grooves	hooked	Madagascar	Bąk et al. 2019
L.inserata	12.2–33.5/8.2–14.0	15–20	4–5 per striae, round to elongated with small spines on margin	bent with irregular thread-like grooves	hooked	Vietnam	this study
	23–28/12	18	–	–	–	Sumatra	Hustedt 1955
	18–28/10.0–13.5	16–19	5–6 per striae, round to elongated	deflected	hooked	Indonesia, Australia	Levkov et al. 2013
	15–25/9–12	20	4–6 per striae, round to elongated*	–	–	Vietnam	Glushchenko et al. 2017
L.seposita	16.8–24.4/9.5–12.4	14–17	4–5 per striae, round to slightly elongated areolae	bent, with small C-shaped grooves	hooked	Hainan Island	this study
	23/11	16–18	–	bent	bent slightly S-shaped	Sulawesi	Hustedt 1942
	18–24/10–12	18–21	4–5 per striae, transapically elongated	Hook-shaped	hooked	–	Levkov et al. 2013
L.tropica	11.8–21.2/7.5–11.1	17–20	4–5 per striae	clearly bent with long irregular thread-like grooves	hooked	Hainan Island, Vietnam	this study
	12–22/7–9	20	–	–	–	South Africa	Cholnoky 1960
	15.5–24.0/8–11–5	20–24	4–5 per striae, round to transversally elongated	Bent and expanded into central pores	hooked	–	Levkov et al. 2013
	11–24/7–9	20–24	4–5 per striae*	–	–	Vietnam	Glushchenko et al. 2017
	8.8–19.8/6.3–10.3	16–18	4–5 per striae, round or slightly elongated*	slightly deflected with long irregular thread-like grooves*	hooked*	Brazil	Straube et al. 2017