Is Keyhole sand dollar a sponge
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Is Keyhole sand dollar a sponge

[From: ] [author: ] [Date: 11-05-16] [Hit: ]
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No it is not, they belong to seperate familes as you can see by their scientific classifications

Sand Dollar:
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Clypeasteroida
Suborder: Scutellina
Family: Mellitidae
Leske, 1778
Genus: Mellita

Sponge:
Kingdom: Animalia
Subkingdom: Parazoa
Phylum*: "Porifera"

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No, they're both echinoderms but sand dollars are closer to sea urchins; they are essentially flattened sea urchins.
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