Table 5 in Ceriantharia (Cnidaria) of the World: an annotated catalogue and key to species

Table 5. Comparison of anatomical features of Botruanthus species (after Stampar et al. 2016 a). B. benedeniB. mexicanusMarginal tentaclesUp to 90-100Up to 40-60Directive labial tentaclePresentPresentArrangement of labial tentacles(1)321.3213.3213(2)314.2314.2314.2314Actinopharynx1/3 - 1/4 of gastric cavity1/5-1/4 of gastric cavityOral disc1.1-1.3 cm0.5-0.7 cmSiphonoglyphBroad, 8 mesenteries attachedNarrow, 2 mesenteries attachedDirective mesenteries>Actinopharynx (= size of Actinopharynx)> ActinopharynxP2Long, almost to aboral pole (> 2/3 of gastric cavity)Short (<1/3 of gastric cavity)P3Short (1/3 of P2)Short (~P2)M1To aboral poreAlmost to aboral poreM3Almost to aboral poreShort, 1/2 of M1Cnido-glandular tract at fertile mesenteries of first quartetsPresentPresentCraspedion tract at fertile mesenteries5/7-8/98/9Cnido-glandular tract at B<½3/4Craspedonemes of craspedion at fertile mesenteriesSometimes presentSometimes presentBotrucnidaeRare in m and B, absent in M and b mesenteriesVery abundant (4-5 groups) in M and m, absent in B and b mesenteries