Compsocidaris pyrsacantha Ikeda 1939
Family: Cidaridae	Order: Cidaroida
Locality: Philippines, Balut Island, 200 - 300 m, by tangle nets, 2011	Dimensions: 60,5 mm Ø x 45,5 mm
I got this specimen as Compsocidaris pyrsacantha, but I thought, that the correct taxon was another one. Following http://www.nhm.ac.uk/research-curation/research/projects/echinoid-directory/taxa/taxon.jsp?id=1139 the pore pairs should be non-conjugate, but in the present specimen they are. Furtheron the true C. pyrsacantha seemed to occur only around Japan. Later on in "Sea Urchins III" by Heinke Schultz I found pages 890-891, dealing with Compsocidaris pyrsacantha. Especially Fig. 1501 shows a specimen, also from Balut Island, fitting very well with the specimen above.