Table 2 Basionyms that have been associated with P in Morphological and molecular variability of Peridinium volzii Lemmerm. (Peridiniaceae, Dinophyceae) and its relevance for infraspecific taxonomy

Table 2 Basionyms that have been associated with P. volzii, with diagnostic traits and further information as inferred from the protologues, and abundance of such traits in the investigated material
Basionym, protologueDiagnostic trait(s)Length/width [μm]Cingulum displacementRibotype (frequency) [n =100 for each ribotype]ImageP. tabulatum var. maeandricum Lauterborn, nom. corr. (ICN Art. 23.5), Verhandlungen des Naturhistorisch-Medicinischen Vereins zu Heidelberg n.s. 7: 604 (1904)Meandering ridges on plates’ surface62 ‒ 70/68 ‒ 74–I (–), II (–), III (–)Hansen & Flaim (2007: Fig. 16A, G)P. volzii Lemmerm., Abhandlungen herausgegeben vom Naturwissenschaftlichen Verein zu Bremen 18: 166–167, pl. XI 15–18 (1905)Plate 1′ small38/–1×I (100%), II (100%), III (100%)1a–iP. volzii var. australe G.S.West, Journal of the Linnean Society. Botany 39: [12, 19, 32, 41, 45,]80[–81], Fig. 10A–G (1909)Plates 1 ‴ and 2′ ‴ of unequal size40 ‒ 56/39 ‒ 591.5×I (86%), II (90%), III (83.5%)3iP. volzii var. maximum C.Bernard, Sur quelques algues unicellulaires: 82, Fig. 186 (1909)Larger cell size47 ‒ 58/47 ‒ 54–I (1%), II (4%), III (45%)–P. guestrowiense Er.Lindem., Archiv für Hydrobiologie und Planktonkunde 11: 490–491, Figs 1–3 (1916)Unawareness of P. volzii, but without antapical spine42 ‒ 48/42 ‒ 481×I (100%), II (100%), III (100%)–P. guestrowiense forma late-intercalatum Er.Lindem., Archiv für Hydrobiologie und Planktonkunde 11: 491–492, Figs 4–5 (1916)Broad sutures38 ‒ 441×I,II, III (broad range)1a; 3b, iP. guestrowiense forma latissime-intercalatum Er.Lindem., Archiv für Hydrobiologie und Planktonkunde 11: 492, Figs 9–10 (1916)Even broader sutures38 ‒ 44–I,II, III (broad range)3e, k ‒ lP. guestrowiense forma geniculatum Er.Lindem., Deutsche Gesellschaft fur Kunst und Wissenschaft in Posen. Zeitschrift der Naturwissenschaftlichen Abteilung (des Naturwissenschaftlichen Vereins). Posen 25: 25 (1918)Obtuse angle between plates 2′ and 4′––I (–), II (–), III (–)–P. guestrowiense forma lineatum Er.Lindem., Deutsche Gesellschaft fur Kunst und Wissenschaft in Posen. Zeitschrift der Naturwissenschaftlichen Abteilung (des Naturwissenschaftlichen Vereins). Posen 25: 25 (1918)Plates 1a, 2a, 3′ narrow––I (1%), II (1%), III (1%)3gP. guestrowiense forma sinuatum Er.Lindem., Archiv für Protistenkunde 39: 248–249, Figs 107–110 (1919)Transversal bending–0.5×I (1%), II (1%), III (1%)–P. guestrowiense forma compressum Er.Lindem., Archiv für Protistenkunde 39: 249, Figs 111–113 (1919)Dorso-ventral compression42/–1×I (1%), II (1%), III (1%)3hP. guestrowiense forma cyclicum Er.Lindem., Archiv für Naturgeschichte 84.8: 156, Figs 123–124 (1920)Cyclic configuration of apical plates46/–1.5×I (1%), II (1%), III (1%)–P. guestrowiense subvar. originale Er.Lindem., Archiv für Naturgeschichte 84.8: 158, Fig. 133 (1920)Plate 3 ‴ split––I (1%), II (2%), III (1%)3iP. guestrowiense var. betacollineatum Er.Lindem., Archiv für Naturgeschichte 84.8: 179, Fig. 190 (1920)β-collineation between plates 3a 4′, 5″, 6″––I (–), II (–), III (–)–P. willei var. botanicum Playfair, Proceedings of the Linnean Society of New South Wales 44: 813, pl. XLI 3 (1920)Two posterior spines, plates 1 ‴ and 2′ ‴ of equal size42 ‒ 60/40 ‒ 602I (–), II (–), III (–)–