nepionic constriction

nepionic constriction
(MOLLUSCA: Cephalopoda]
In a nautiloid shell, a definite growth discontinuity of the shell micro-ornamentation thought to correspond to eclosion from the egg.

Online Dictionary of Invertebrate Zoology. . 2005.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Nautilus praepompilius — Temporal range: Late Eocene – Oligocene Scientific classification Kingdom: Animalia Phylum: Mollusca Class …   Wikipedia

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