Identifying Sponges

Key to California Porifera (Page 143)

( From page 134 B) Microscleres NOT Sigmas ONLY, but may include Onychaetes OR Rhaphides.
[A] GO TO PAGE 144
Immature Styles looking like Raphides may be present.
Onychaetes absent.
[B] GO TO PAGE 145
NO Rhaphides or Styles looking like Raphides.
Onychaetes present.
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