- asconoid grade
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(PORIFERA)A grade of construction in which the choanocytes line thin, short tubes; see syconoid grade, leuconoid grade or type.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
asconoid grade
Look at other dictionaries:
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 … Dictionary of invertebrate zoology
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
