Caption

Scanning electron microscope image of Lytechinus pictus [sea urchin] embryo at the 2-cell stage. Fertilization envelope has been removed to reveal the cells covered with a dense meshwork of the hyaline layer, in which microvilli are embedded.

Class Echinoidea

Superorder Echinacea

OrderTemnopleuroida

Lytechinus pictus

JEOL 35C SEM

Writer

Evelyn Spiegel, Louisa Howard

Keywords

marine invertebrate, SEM, sea urchin, embryo