You searched for: “planktospheroidea
Planktospheroidea, planktosphaeroidea (s) (noun) (no pl)
An existing group of primitive worm-like animals, or hemichordata: In the Bay of Biscay, two types of planktonic, ciliated larvae, known as planktosphaeroidea, have been discovered. The inner composition suggests that the planktosphaeroidea are hemichordates, but the adults are unknown.
This entry is located in the following unit: plankto-, plankt-, -plankton (page 5)