clavule

From ZooTerms (Dictionary of Invertebrate Zoology)
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« clava | cleavage nucleus »
clavule (noun; Latin diminutive clava, club): 1. (Echinodermata: Echinoidea) In Spatangoida, a minute ciliated spine on the test.

2. (Porifera) A modified triaxonal spicule with a disk or bulb at one end.

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