A prodissoconch (meaning first or earliest or original shell) is an embryonic or larval shell which is present in the larva of a bivalve mollusk (clams...

gastropods. The homologous structure in bivalves (clams) is called the prodissoconch. Comparison of the whole shell and the protoconch of Atlanta lesueurii:...

the notable straight hinge of the prodissoconch I shell. The veliger continues to mature forming the prodissoconch II shell. In the end stage of veliger...

most commonly the umbo or beak. In some species the embryonic shell or prodissoconch may be present at the apex of each of the two valves. Dance, S. Peter...

is not eroded or worn down at all, it may still be capped with the prodissoconch, which is the larval shell of the animal. Hatterlie, Eugene C.; Abbott...

undergo considerable growth. As this occurs, the shell (known as a prodissoconch) and structures such as the larval foot, velum and visceral organs increase...

of the Pacific oyster are planktotrophic, and are about 70 μm at the prodissoconch 1 stage. The larvae move through the water column via the use of a larval...

a longer posterior end. It has a small, sharply pointed beak and a prodissoconch 200 μm in diameter. The shell has irregular, slightly wavy commarginal...

10-20 prominent teeth while the other has matching indentations. The prodissoconch starts out rounded and nearly circular before stretching into a parallelogram...

part is white, but a colourful (usually crimson, but it can be yellow) prodissoconch is clearly visible at the apical end. Right and left valve of the same...

of the Pacific oyster are planktotrophic, and are about 70 μm at the prodissoconch 1 stage. The larvae move through the water column via the use of a larval...

many angles. Porcellanous – Like porcelain. Prismatic – Like a prism. Prodissoconch – The embryonic shell. Protoconch – The embryonic shell. Protract –...