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
Eunapius fragilis
Gemmoscleres
Megascleres
Microscleres - absent
- Rod-shaped
- Covered with conspicuous spines, often more abundant at tips
- Attached tangentially to gemmule
Megascleres
- Needle-like
- Smooth
Microscleres - absent
Heteromeyenia baileyi
Gemmoscleres
Megascleres
Microscleres
- Two class sizes
- Shafts with conical spines
- Ending in both ends with umbrella-like discs with incised teeth
Megascleres
- Needle-like
- Microspined at tips
Microscleres
- Needle shaped with spines which increase in size toward center which can end in knobs
Heteromeyenia tentasperma
Gemmoscleres
Megascleres
Microscleres
- Two sizes
- Ends with several spines or hooks
Megascleres
- Needle-like
- Straight to slightly curved with few microspines
Microscleres
- Needle-like
- Much smaller than megascleres
- Very slender with few microspines
Heteromeyenia tubisperma
Gemmoscleres
Megascleres
Microscleres
- Two class sizes
- Stout shafts with small number of spines
- Ending on both ends in a number of lateral spines
Megascleres
- Needle-like
- Few microspines
Microscleres
- Slender
- Entirely spined with central spines larger