Eurystomellidae Levinsen, 1909

Diagnosis: Colony thinly calcified, forming encrusting sheets, or free-living, lunulitiform, anchored by basal rhizoids. Zooids with extensive gymnocystal frontal, with minute oral cryptocyst embayments and small, proximal costal areas. Avicularia absent. Ovicells large, immersed, sometimes kenozooidal, with uncalcified frontal windows.

This family includes the genera

1. Eurystomella
2. Integripelta
3. Selenariopsis
4. Zygopalme

Selenariopsis gabrieli (Other images available)	Selenariopsis macgillivrayi	Selenariopsis marginata	Zygopalme crystallina (thanks to Dennis Gordon, NIWA)