leuconoid grade or type

leuconoid grade or type
(PORIFERA)
A grade of construction of sponges in which the choanocyte chambers are small, and distributed through the interior tissues; see asconoid grade, synconoid grade.

Online Dictionary of Invertebrate Zoology. . 2005.

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Look at other dictionaries:

  • asconoid grade — (PORIFERA) A grade of construction in which the choanocytes line thin, short tubes; see syconoid grade, leuconoid grade or type …   Dictionary of invertebrate zoology

  • leucon — see leuconoid grade or type …   Dictionary of invertebrate zoology

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