Identifying Sponges

Key to California Porifera (Page 200)

( From page 199 A) Microscleres present. may include Sigmaspires, Spiny Sigmas, Asters or Microxeas. The latter are in the range of 35 - 100 μm long.
[A] GO TO PAGE 202
Microscleres = Sigmaspires OR Spiny Sigmas.
[B] GO TO PAGE 201
Microscleres other than Sigmaspires or Spiny Sigmas.
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