A molluscan with calcareous spicules is

Lepidopleurus

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Doris

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Neopilina

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Chaetoderma

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Solution

The correct option is D Chaetoderma
Aplacophora is a small group of marine molluscs. It is characterized by absence of shells, absence of foot and worm-like appearance. Their mantle secretes tiny calcareous shiny spicules all over the body. Examples of this group includes Neomenia, Chaetoderma.
Thus, the correct answer is option D.

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