Corvomeyenia everetti
Gemmoscleres
Megascleres
Microscleres
- Smooth long shafts with 5-7 curved hooks on ends
Megascleres
- Needle-like
- Smooth
Microscleres
- Narrow shaft ending in 3-5 curved hooks on both ends
Duosclera mackayi
Gemmoscleres
Megascleres
Microscleres – absent
- Rod shaped
- Stout, straight or slightly curved
- Covered with spines
Megascleres
- Needle-like
- Straight or slightly curved
- Covered with spines
Microscleres – absent
Ephydatia fluviatilis
Gemmoscleres
Megascleres
Microscleres - absent
- Short thick shafts
- Flat ends with more than 20 teeth, not deeply incised
Megascleres
- Needle-like
- Slightly curved, rarely straight
- Smooth
Microscleres - absent
Ephydatia muelleri
Gemmoscleres
Megascleres
Microscleres - absent
- Short thick shafts
- Flat ends with less than 12 teeth, deeply incised
Megascleres
- Needle-like
- Straight to slightly curved
- Small spines along length or smooth
Microscleres - absent