Polychaos dubium is a freshwater amoeboid and one of the larger species of single-celled eukaryote.
P. dubium reportedly has one of the largest genome size of any organism known,[3] though the authors of a 2004 study suggest treating that measurement with caution.
[1] Unlike species of Amoeba, P. dubium lacks longitudinal ridges on its pseudopods.
[5] During rapid locomotion, P. dubium may become monopodial (present only one pseudopod),[6] but there are an average of 12 pseudopodia.
The authors of one 2004 study, however, suggest treating that measurement with caution, because it was taken before the advent of modern genomic methods.