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selenizone

Translation
selenizone
n. [Gr. selene, moon; zone, girdle]
(MOLLUSCA: Gastropoda)
In dibranchiates, a spiral band of crescentric growth lines or threads (lunulae) on the shell surface due to the semicircular end of a notch or slit on the outer lip; a slit band; corresponds to the anal fasciole of some other groups.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • lunula — n.; pl. lunulae [L. dim. luna, moon] 1. A small lunate mark or crescent shaped object. 2. (MOLLUSCA: Gastropoda) A crescentic ridge on the selenizone, concave toward aperture …   Dictionary of invertebrate zoology

  • pseudoselenizone — n. [Gr. pseudos, false; selene, the moon; zone, girdle] (MOLLUSCA: Gastropoda) A band of crescentic growth lines on the shell surface resembling a selenizone, but not identifiable as caused by a notch or slit in the aperture …   Dictionary of invertebrate zoology

  • slit band — see selenizone …   Dictionary of invertebrate zoology

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