| ( From StartKey ): Review spicule (skeletal) types; ascertain the general nature of the spicules then choose one of the following categories: | |
[A.] SILICEOUS SPICULES PRESENT WITH OR WITHOUT SPONGIN FIBERS [GO TO page 2 ] |
[B.] CALCAREOUS SPICULES PRESENT Calcareous triacts ( triradiates) or quadriradiates present (may have other spicule types also) [GO TO page 217 ] |
[C.] NO SPICULES - SPONGIN FIBER SKELETON ONLYNo spicular skeleton although fibers may contain foreign spicules, sand grains etc. Foreign spicules are usually broken, of improbable combinations such as both calcareous and siliceous spicules together, and/or of low numbers. [GO TO page 235 ] |
[D.] WITHOUT SKELETON No fibers, No spicules) [GO TO page 234 ] |