Distribution of spinochromes in sea urchins.

Order, family, species	The six main spinochromes						Others	Reference
	1	2	3	4	5	6
Camarodonta; Echinometridae
Echinometra mathaei	+	+	+	+			—	6
	+	+	+	+		+	—	35
Anthocidaris crassispina (transferred to Heliocidaris crassispina)	+	+	+	+			—	50
Camarodonta; Parechinidae
Psammechinus miliaris	+	+	+	+		+	Sulphate derivatives of 3 and 6, 32	28
Camarodonta; Strongylocentrotidae
Mesocentrotus nudus	+	+	+	+		+	19	21
	+	+	+	+		+	Acetylaminotrihydroxynaphthoquinone, 17, 32	5
	+	+	+	+		+	32	17
Strongylocentrotus droebachiensis		+		+	+	+	25, 26	25
			+		+		25, 26, spinochrome dimers with molecular masses 536 and 484	4
	+		+		+	+	20–23, 26 and 27	23
Strongylocentrotus intermedius		+	+	+	+		25	24
			+				—	51
Strongylocentrotus pallidus						+	32	23
Strongylocentrotus polyacanthus	+	+	+	+	+	+	Dimethoxy derivative of 6, 32	23
Camarodonta; Toxopneustidae
Toxopneustes pileolus		+	+	+			—	52
	+	+	+	+	+	+	—	35
Tripneustes gratilla	+				+	+	17	35
Clypeasteroida; Echinarachniidae
Echinarachnius parma	+			+		+	23, 26, 27, 30 and 31	23
Clypeasteroida; Scutellidae
Scaphechinus mirabilis	+				+		23, 26–29, 30 and 31	15, 16 and 27
Diadematoida; Diadematidae
Astropyga radiata	+				+	+	23, 26	26
Spatangoida; Schizasteridae
Brisaster latifrons	+				+	+	26	23
Stomopneustoida; Glyptocidaridae
Glyptocidaris crenularis			+		+	+	—	51