Identifying Sponges

Key to California Porifera (Page 217)

( From page 001 B) CALCAREOUS SPICULES PRESENT: Calcareous Triacts (Triradiates) or Quadriradiates present (may have other types also).
[A] GO TO PAGE 219
Sponge borne on a narrow stalk at least one-fourth to one-third of the total height.
Note: If sponge has a distinct tripartate body (oscular tube, trunk, stalk) and occurs at depths > 1000 m., see page 265.
[B] GO TO PAGE 218
Sponge WITHOUT stalk.
START 001 002