Oral Disc: Consists of a thin plate of tissue closing in the upper end of the cylindrical body. It is perforated in the center by the mouth, bears the tentacles on the outer part, and is marked by radiating lines which represent the insertions of the mesenteries into its underside (Stephenson, 1928; p. 22).


Oral Disc Images: (species names are linked to the Hexacorallian database)

Species: Aulactinia incubans

Caption: Oral disc of Aulactinia incubans. Note that white lines over directive endocoels cross oral cone whereas others do not; planulae or juveniles (arrows) inside tentacles.

Species: Phellia abyssicola

Caption: Phellia abyssicola, seen from above.

Species: Hoplophoria coralligens

Caption: Oral view of the living animal. The part n.b. of the stinging organ is the battery of nettle cells.

Species: Urticina columbiana

Caption: View of expanded disk and tentacles from a living specimen of Urticina columbiana.

Species: Anemonia depressa

Caption: Oral disk of Anemonia depressa.

Species: Cryptodendrum adhesivum.

Species: Paractinostola bulbosa

Caption: Paractinostola bulbosa von der Mundseite.

Species: Megalactis griffithsi

Caption: The stinging anemone Megalactis griffithsi, long-armed variety.

Species: Paractis alba

Caption: Paractis alba. Von oben, die Tentakelscheibe halb eingestülpt.

Species: Heterodactyla hypnoides

Caption: expanded polyp with pinnatified tentacles.

Species: Siphonactinia boeckii

Caption: Siphonactinia boeckii. a. tentacles. b. the tube. c. longitudinal split. d. the collar.

Species: Discosoma haddoni

Caption: Giant anemone, Discosoma sp.