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Larval shell of a mollusk
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
Prodissoconch
Embryonic or larval shell of some molluscs
gastropods. The homologous structure in bivalves (clams) is called the prodissoconch. Comparison of the whole shell and the protoconch of Atlanta lesueurii:
Protoconch
Species of mollusc
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
Blue_mussel
Species of bivalve
part is white, but a colourful (usually crimson, but it can be yellow) prodissoconch is clearly visible at the apical end. The type series representing this
Spondylus_varius
Part of the shell of a mollusk
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
Apex_(mollusc)
Larval stage of some molluscs
undergo considerable growth. As this occurs, the shell (known as a prodissoconch) and structures such as the larval foot, velum and visceral organs increase
Veliger
Eggs and sperm released into water
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
Spawning
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
Beak_(bivalve)
Species of clam
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
Cymatioa_cookae
Genus of bivalves
10-20 prominent teeth while the other has matching indentations. The prodissoconch starts out rounded and nearly circular before stretching into a parallelogram
Asperarca
Species of bivalve
inequilateral. Beaks fairly prominent, with a moderately large rounded prodissoconch which is marked off from the post-embryonic part of the shell by a slightly
Perrierina_insulana
Species of bivalve
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
Pacific_oyster
Genus of bivalves
anterior side being significantly shorter). The genus has a cap-shaped prodissoconch and shallow hinge plates, that have pairs of small cardinals in each
Perrierina
many angles. Porcellanous – Like porcelain. Prismatic – Like a prism. Prodissoconch – The embryonic shell. Protoconch – The embryonic shell. Protract –
Glossary_of_gastropod_terms
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