- umboniform
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adj. [L. umbo, knob or boss; forma, shape]1. Like or shaped like an umbo.2. (MOLLUSCA: Gastropoda)
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
rotelliform — adj. [L. dim. rota, wheel; forma, shape] (MOLLUSCA: Gastropoda) Almost lenticular, but with a low obtuse spire; see umboniform … Dictionary of invertebrate zoology