n. [L. pro, before; dis, two; concha, shell]
(MOLLUSCA: Bivalvia)
1. The embryonic shell.
2. Early shell secreted by the shell gland of the larva.
3. Later shell secreted by the mantle edge.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

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  • prodissoconch — pro·dissoconch …   English syllables

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  • Spawn (biology) — The spawn (eggs) of a clownfish. The black spots are the eyes developing. Spawn refers to the eggs and sperm released or deposited, usually into water, by aquatic animals. As a verb, spawn refers to the process of releasing the eggs and sperm,… …   Wikipedia

  • protoconch — n. [Gr. protos, first; konche, shell] (MOLLUSCA: Gastropoda) The embryonic shell of a univalve, indicated by the apical whorls of the adult shell being clearly demarcated from later ones; see prodissoconch …   Dictionary of invertebrate zoology

  • protostracum — n. [Gr. protos, first; ostrakion, a shell] (MOLLUSCA: Bivalvia) 1. In larval forms, the first formed part of a prodissoconch. 2. In oysters, the shell of the D shaped larval stage; straight hinge veliger …   Dictionary of invertebrate zoology

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