Cryptic diversity of small‐sized species ofPhalacroma(Dinophysales, Dinophyceae) from Denmark Strait (Eastern Arctic Greenland)

SUMMARY Phalacroma currently comprises 69 species of mostly marine heterotrophic dinophysoids. With a round cell body and short sulcal and cingular lists, Phalacroma spp. have a simple morphology compared to other dinophysoid genera. Therefore, species identification is not always a trivial matter. A few Arctic species have been described and, with the exception of Ph. rotundatum , they are not only infrequently recorded but also occur in low...