Protoconch
Videos
A protoconch is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called "nu
An SEM image of the trochophore of Haliotis asinina 11 hours post fertilization, with calcified protoconch (pc) prior to torsion.
Protoconch of Haliotis asinina when the torsion is complete.
Growth series of Caecum glabrum showing protoconch in bottom image.
Kuroshiodaphne supracancellata is a species of sea snail, a marine gastropod mollusc in the family Raphitomidae.
