Calycina is a scientific name for several organisms and may refer to:
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''Calycina'' (beetle), a genus of insects in the family Mordellidae
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''Calycina'' (fungus), a genus of fungi in the family Pezizellaceae
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Calycina (echinoderm)
The Phymosomatoida are an order of sea urchin
Sea urchins or urchins () are echinoderms in the class (biology), class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal zone to deep s ...
, a superorder of sea urchins
{{Taxonomy disambiguation