Caption

Scanning electron microscope image of Strongylocentrotus drobachiensus [sea urchin] embryo at the late gastrula stage. This is a high magnification image of "04SeaUrchinSEM". Embryo was cut to reveal blastocoel cavity. The primary mesenchyme cells have formed a syncytial ring, which is the precursor to spicule formation(developing calcareous larval skeleton).

Class Echinoidea

Superorder Echinacea

Order Echinoida

Strongylocentrotus drobachiensus

JEOL 35C SEM

Writer

Louisa Howard

Keywords

marine invertebrate, SEM, sea urchin, embryo