Table 7 in Ceriantharia (Cnidaria) of the World: an annotated catalogue and key to species

Table 7. Comparison of anatomical features of Arachnanthus species (after Stampar et al. 2018). A. australiaeA. bockiiA. oligopodusA. sarsiiA. lilithMarginal tentaclesUp to 40Up to 30~20Up to 35Up to 24Arrangement of labial tentacles(0)1.11.11.11.11(0)1.11.11.11.11(?)(0)1.11.11.11.11(0)1.11.11.11.11(0)3.12.31.23.23.12Length of actinopharynx~2/3 of gastric cavity~1/2 of gastric cavity~1/2 of gastric cavity~1/2 of gastric cavity>1/2 of gastric cavityHyposulcus~1/2 size of stomodeum~1/2 size of stomodeum~2X size of stomodeum<size of stomodeum= size of stomodeumOral disc diameter~0.7 cm--~1 cm0.5 cmMesentery attachment to actinopharynxBroad, 12 mesenteries attachedBroad, 12 mesenteries attachedNarrow, 4 mesenteries attachedBroad, 6 mesenteries attachedBroad, 8 mesenteries attachedDirective mesenteries= length of Actinopharynx<length of Actinopharynx> length of Actinopharynx<length of Actinopharynx<length of ActinopharynxP(C)2Short, 1/2 of gastric cavityVery short, 1/4 of gastric cavityShort, 1/2 of gastric cavityLong, 3/4 of gastric cavityLong, 6/7 of gastric cavity, almost to aboral poleP(C)3Very short, <1/4 of gastric cavityVery short, <1/4 of gastric cavityShort, ~1/2 of gastric cavityShort, ~1/3 of gastric cavityShort, 1/3 of gastric cavityM1Almost to aboral poreAlmost to aboral poreTo aboral poreAlmost to aboral poreTo aboral poreM34/5 of gastric cavityAlmost to aboral pore1/5 of gastric cavityAlmost to aboral pore3/4 of gastric cavityCnido-glandular tract of fertile mesenteriesPresent (short?)Present (short?)PresentPresentPresentCnido-glandular tract of BPresent (short?)Present (short?)Present (short?)Present (short)Present (short)AcontioidsOnly in M1, M2 and M3Only in M1, M2 and M3Only in M1Only in M1, M2 and M3Only in M3 and M4