Family: Usually polypodial, pseudopods granular, cylindroid.
Genus: Pseudopods meld at bases during polypodial locomotion; nucleus oval (Illustrated Guide, 1985). Usually polypodial; pseudopodia sometimes flattening and broadening towards ends; may be monopodial in rapid locomotion; no dorsal ridges (Page, 1976).

P. dubium 5 clips Japan, 1998	P. dubium 4 clips Japan, 1998	P. dubium 2 clips Japan, 1998	P. dubium 6 clips Japan, 1998
P. dubium 2 clips Japan, 1998	P. dubium 5 clips Japan, 1998	P. dubium 5 clips Japan, 1998