Fig. 1

Schemes of the possible phylogenetic position and life cycles of Syssomonas and Pigoraptor. a Pluriformea as a sister lineage to the clade uniting animals, choanoflagellates, and filastereans (including Pigoraptor) according to Hehenberger et al. [37]. b Pluriformea as a sister lineage to Ichthyosporea within Teretosporea according to López-Escardó et al. [42]. c Life cycle of Syssomonas multiformis. d Life cycle of Pigoraptor vietnamica and P. chileana