TABLE 1 in Gomphonema rajaguruii sp. nov., a new diatom (Bacillariophyceae) species from the Western Ghats, India

TABLE 1. Comparison between the morphologically similar species and Gomphonema rajaguruii sp. nov. from the different sources. (— indicates unknown)
Features / SpeciesGomphonema rajaguruii sp. novGomphonema kallarense Pardhi et al. 2020Gomphonema lujanense E. Reichardt & Maidana 2008Gomphonema pseudointermedium E. Reichardt 2008Gomphonema zellense E. Reichardt 1999Gomphonema supertergestinum E. Reichardt 2009Gomphonema irroratum Hustedt 1945Valve length (μm)45.5–71.032.9–46.6176.4–52.628.0–55.027.0–60.022.0–52.024.0–37.0Valve width (μm)8.8–12.86.8–9.15.6–9.06.6–7.79.2–11.07.0–9.05.5–7.5Valve shapeLanceolate - RhombicLanceolate-clavateLanceolate-clavateClavateClavateLanceolate to ellipticClavateHead poleSlightly broadly rounded towards poleBroadly rounded, almost flat, slight capitateBluntly rounded or truncate with small pore fieldObtusely roundedRoundedBroadly roundedBroadly roundedFoot poleNarrowly rounded, elongated towards poleNarrow roundedNarrow roundedNarrow roundedRoundedNarrowly roundedRoundedStriae (10 μm)9–10 in central area 10–12 towards poles9–137–1210–118–109–1214–16Striae pattern (Head to Centre)Slightly radiate from head pole to central valveSlight radiateModerately radiateStrongly radiateRadiateRadiateStrongly RadiateStriae pattern (Centre to Foot)Strongly radiate towards the foot poleRadiateRadiateWeakly radiateSlightly radiateParallelRadiateAreolae (10 μm)60–7060–70——22–26—30–35Areolae patternBiseriate, slit-shaped, aligned alternativelyBiseriate, slit-shaped, aligned alternativelyBiseriate, slit-shaped, aligned alternativelyMostly biseriate, slit-shapedUniseriate and Partially biseriateBiseriate, RoundBiseriate, roundRapheWeakly undulateLateral to undulateLateralLateral fissure somewhat undulateNarrow, LateralLateral or filiformLateral, undulatedAxial area (size)Slightly broader, linear to lanceolateBroad to narrow, lanceolateModerately narrow, linear to lanceolateNarrow, linearNarrow, linearNarrow, linearNarrow, linear to lanceolateCentral areaDistinct, smallDistinct, smallUnilaterally widened with one greatly shortened striaSmallLarge to nearly rectangularDistinct, Extended to the edge, Very short striaeSmall, irregular to ellipticPseudoseptumPresentPresent——AbsentPresent—Stigma ExternallyOvalRoundRoundRoundRoundRound1HabitatWet wallStreamRiverLakeLakeLakeLakeType localityMahabaleshwar, Maharashtra, IndiaKallar stream, Kerala, IndiaLujan river, ArgentinaInley Lake, BurmaZellsee Lake, GermanyBrandenburg, GermanyBalkan Highlands, Balkan PeninsulaReferencePresent studyPardhi et al. (2020)Reichardt (2008)Reichardt (2008)Reichardt (1999)Reichardt (2009)Hustedt (1945)