Ephydatia is a genus of sponges belonging to the family Spongillidae.^[1]

Ephydatia
E. gutenbergiana from the Messel Formation
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Porifera
Class:	Demospongiae
Order:	Spongillida
Family:	Spongillidae
Genus:	Ephydatia Lamouroux, 1816
Species[1]
See text
Synonyms[1]
Clypeatula Peterson & Addis, 2000 Ephidatia Lecoq, 1862 Meyenia Carter, 1881 Pleiomeyenia Mills, 1884 Trachispongilla Rousseau, 1906 Trachyspongilla Dybovsky, 1878

The genus was first described by Jean Lamouroux in 1816.^[1]

The genus has cosmopolitan distribution.^[1]

Species:

• Ephydatia caatingae Nicacio & Pinheiro, 2015
• Ephydatia chileana Pisera & Sáez, 2003
• Ephydatia facunda Weltner, 1895
• Ephydatia fluviatilis (Linnaeus, 1759)
• Ephydatia fortis Weltner, 1895
• Ephydatia gutenbergiana (Müller, Zahn & Maidhoff, 1982)
• Ephydatia japonica (Hilgendorf, 1882)
• Ephydatia kaiseri Rauff, 1926
• Ephydatia meyeni (Carter, 1849)
• Ephydatia millsii (Potts, 1888)
• Ephydatia muelleri (Lieberkühn, 1856)
• Ephydatia mülleri (Lieberkühn, 1855)
• Ephydatia ramsayi (Haswell, 1883)
• Ephydatia robusta (Potts, 1888)
• Ephydatia subtilis Weltner, 1895
• Ephydatia syriaca Topsent, 1910