FIGURE 1 in To be or not to be: On the usefulness of infraspecific names in Heterocapsa steinii (Heterocapsaceae, Peridiniales)

FIGURE 1. Illustrations of infraspecific variations within Heterocapsa steinii (reprinted from Lindemann 1920, 1924a), with interpretative plate labelling. A. 'Heterocapsa triquetra' sensu Stein (1883) in the interpretation of Lindemann (1924a, b). B. Heterocapsa triquetra [var. triquetra] forma apiculata, nom. illeg. (note that this illustration is not provided by Lindemann 1924a and is here interpreted based on his description, with the APC highlighted as red circle). C. Heterocapsa triquetra var. litoralis (lectotype); the dashed line indicates (wrongly) the original form in the interpretation of Lindemann (1924a, b; see Fig. 1A). D. Heterocapsa triquetra var. litoralis forma apiculata (lectotype). Note that Fig. 1A–C are probably inexistent in nature and that Fig. 1D cannot be differentiated from Heterocapsa steinii (Tillmann et al. 2017).