| Marginal tentacles |
Up to 40 |
Up to 42 |
Up to 60 |
Up to 32 |
| Arrangement of labial tentacles |
(3)413.4242.4312.4312 |
(1)1.11.11.11.11 |
(1)2.12.12.12.12 |
(2)431.4231.4231 |
| Length of actinopharynx |
~1/4 of gastric cavity |
~2/5 of gastric cavity |
~2/5 of gastric cavity |
~1/2 to 1/3 of gastric cavity |
| Hyposulcus |
~2/3 size of stomodeum |
= size of stomodeum |
= size of stomodeum |
= size of stomodeum |
| Oral disc diameter |
~2cm |
2 cm |
3.5 cm |
~0.5 cm |
| Mesentery attached to siphonoglyph |
Broad, 18 mesenteries attached |
Broad, 10 mesenteries attached |
Broad, 12-14 mesenteries attached |
Broad, 16 mesenteries attached |
| Directive mesenteries |
= length of Actinopharynx |
> length of Actinopharynx |
> length of Actinopharynx |
>length of Actinopharynx |
| P(C)2 |
Long, 3/4 of gastric cavity |
Short, 1/3 of gastric cavity |
Short, 1/3 of gastric cavity |
Long, 3/4 of gastric cavity |
| P(C)3 |
Very short, <1/8 of gastric cavity |
Very short, ~1/6 of gastric cavity |
Very short, ~1/5 of gastric cavity |
Short, ~1/5 of gastric cavity |
| M1 |
Almost to aboral pore |
Almost to aboral pore |
Almost to aboral pore |
Reach aboral pore |
| M3 |
Almost to aboral pore |
Almost to aboral pore |
Almost to aboral pore |
Reach aboral pore |
| Cnido-glandular tract of fertile mesenteries |
Present (short?) |
Present |
Present |
Present (short?) |
| Cnido-glandular tract of B |
Present (short?) |
Present (short) |
Present (short) |
Present (short?) |
| Acontioids |
Only in M1- M4 |
Only in M1-M6 |
M1-M3 (sometimes in M4 and M5) |
Only in M1- M5 or absent |