Megaplanktonic molluscs without a shell are called:
A) cephalopods.
B) thecosome pteropods.
C) gymnosome pteropods.
D) nudibranchs.
E) oceanic limpets.

Question

Quizplus · Accepted Answer

Gymnosome pteropods are a group of large, pelagic molluscs that lack a shell, making them megaplanktonic. Cephalopods are also molluscs, but they typically have a shell or reduced internal shell. Thecosome pteropods have a small, external calcareous shell, while nudibranchs are sea slugs that often have a reduced shell or no shell at all. Oceanic limpets are not a recognized group of megaplanktonic molluscs.

Megaplanktonic Molluscs Without a Shell Are Called