411 REFERENCE · Wikibooks
Dichotomous Key/Porifera
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Porifera Animalia Animalia Porifera Porifera
1
Spicule composition
Calcium carbonate (calcite) - ../Calcarea/
Other - #2
2
Spicule composition
Silica - ../Hexactenellida/
Spongin fiber - ../Demospongiae/