Table 1 in Three new Achnanthidium (Bacillariophyceae) species from Lake Salda (Anatolia, Turkey), a deep soda lake

Table 1. Comparison of morphological characteristics of Achnanthidium barlasii sp. nov., A. dumlupinarii sp. nov., and morphologically similar taxa. Achnanthidium barlasii sp. nov.Achnanthidium dumlupinarii sp. nov.Achnanthidium minutissimumAchnanthidium polonicumAchnanthidium ertziiAchnanthidium sieminskiaeAchnanthidium tropicocatenatumValve length (μm)12.0-21.515.0-26.08.8-17.411.4-21.518-2211-1810.3-23.9Valve width (μm)2.0-3.02.5-3.52.2-4.12.6-4.02.2-2.62-32.7-3.5Valve outlinelinear with parallel margins and lanceolatelinear-lanceolate to linear-rhombic, and clearly inflated in central portionlinear-elliptic to linear-lanceolatenarrow clearly lanceolate with convex marginslinear-lanceolate with convex marginslinear-lanceolatelinear-lanceolate, slightly inflated in the central portionValve apicesprotractedsubcapitate to capitaterostrate to subcapitate protracted or as a rectangular fasciasubcapitateclearly capitateprotracted and capitateprotracted, subcapitate to capitateStriation patternstrongly radiate, throughout the valve and denser near the apicesstrongly radiate throughout the valve, denser towards the apicesstrongly radiate and denser near the apicesradiate throughout the valve and more strongly radiate near the apices-radiate throughout, strongly radiate near apicesradiate throughout the valve, denser towards the apicesRaphe valveCentral areaslightly rhombic with 1-2 spaced striae composed of 3, rounded rectangular areolaesmall bordered by 1-3 widely spaced stria both sidesalmost absent, slightly rounded or as a rectangular fascia (more rarely)rectangular fascia, in some valves with one shortened striae near the valve marginsrounded, never forming a fascia due to presence of several shortened spaced central striaeirregular, 1-2 shortened striaesmall rounded, bordered by one more widely spaced stria on one or both sidesStriae (in 10 μm)27-3027-2830 (up to 35 near the apices)33-34 (up to 35-38 near the apices)28-3030-3236-40 (up to 45 near the apices)Number of areolae (per striae)3 (1-2 at the apices)4 at the central area, 3-4 at the apices3-4 (rarely 2)3-52-33-43-6Rapheless valveCentral areaabsentabsent or slightly rhombicweakly elliptical and almost absentsmall, never forming a fascia with striae slightly more spaced than the striae located towards the apicesalmost non-existing, discernable due to several more widely spaced striaeirregular, 1-2 shortened striaeindistinct or narrow lanceolateStriae (in 10 μm)27-3028-2935 (up to 40 near apices)28-30 (35-38 up to near the apices)28-3430-3238-40Number of areolae (per striae)4 (2-3 at the apices)4-5 at the central area, 3-4 at the apices3-53-52-33-53-6ReferenceThis studyThis studyNovais (2015)Wojtal et al. (2011)Van de Vijver et al. (2011)Witkowski et al. (2012)Marquart et al. (2017)