Genus Plakortis Schulze, 1880

Definition. Plakinidae with spicules diods, triods and calthrops in a single size class, and with homolophose calthrops with one to four lophate rays. Diactine-derived microscleres (micro-rhabds) spheres and spined diods (amphiaster-like spicules) may be present in some species (Muricy & Diaz 2002).