synconoid grade

synconoid grade
(PORIFERA)
A grade of construction intermediate between the asconoid and the leuconoid, in which each radial canal is subdivided into elongate-flagellate chambers grouped around a common excurrent channel; see leuconoid grade, asconoid grade.

Online Dictionary of Invertebrate Zoology. . 2005.

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Look at other dictionaries:

  • 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 …   Dictionary of invertebrate zoology

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