This module holds several additional text keys, offered as either an alternative to the picture key for the considered group, or as small keys to developmental stages, to species, or to groups.

1) Siphonophora: key to species, (Additional Text Keys topic, Siphonophora: key to species)

2) Barnacles: key to larval stages, (Additional Text Keys topic, Barnacles: key to larval stages)

3) Amphipoda: key to suborders, (Additional Text Keys topic, Amphipoda: key to suborders)

4) Caprellidea: key to families, (Additional Text Keys topic, Caprellidea: key to families)

5) Hyperiidea: key to species, (Additional Text Keys topic, Hyperiidea: key to species)