Identifying Sponges

Key to California Porifera (Page 188)

( From page 182 A) Microscleres include Arcuate Isochelae.
[A] GO TO PAGE 191
Microscleres Arcuate Isochelae ONLY.
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[B] GO TO PAGE 197
Microscleres Arcuate Isochelae AND Sigmas OR Arcuate Isochelae, Sigmas and Forceps.
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