Identifying Sponges
Key to California Porifera (Page 259)
( From page 258 A)
Large Hypodermal Pentactins are present.
[A]
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Hypodermal Pentactins are all smooth or granulated; they lack thorns.
[B]
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Hypodermal Pentactins are NOT all smooth or granulated; some are ornamented with thorns.
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