Genus | # M/# MP | M fertile | More mesenteries | Siphonoglyphs/directives | Mesogloeal sphincter | Retractor muscles | # Tentacles | Cinclides | Column surface | Acontia | Cnidome |
---|---|---|---|---|---|---|---|---|---|---|---|
Isanthus Carlgren, 1938 | Not numerous/6 | 1st cycle (6 pairs) | 0 | 2/2 | Not strong | Reniform | Not numerous | No | Smooth | No | Spirocysts, basitrichs, microbasic p-amastigophores |
Paraisanthus Sanamyan and Sanamyan, 1998 | 24–48/6 | 1st cicle (6 pairs) | Distally | 2/2 | Well developed | Strongly restricted, reniform or almost circumscribed | 48–74 | In longitudinal rows | Smooth | No | Spirocysts, basitrichs, p-amastigophores, holotrichs |
Zaolutus Hand, 1955 | Usually 48 in mid column/≤ 12 | Up to 2nd cycle (12 pairs) | Distally | 2/2 | Two sphincters | Restricted, those of directives sometimes reniform | Numerous (up to 6 cycles) | No | Smooth or with microscopic papillae | No | Spirocysts, basitrichs, microbasic p-amastigophores |
Austroneophellia Zamponi, 1978 | 24/12 | ? | ? | 2/2 | Palmate circumscribed | Circumscribed | >50 | No | Smooth | No | Spirocysts, microbasic b-mastigophores, microbasic p-mastigophores |
Eltaninactis Dunn, 1983 | ≤ 12/6 | 1st cycle 6 pairs | Equal or proximally | Absent or indistinct/2 | Weak | Strong, circumscribed | 24, 16 or 17 | No | Tenaculi and cuticle | No | Spirocysts, basitrichs, microbasic p-mastigophores |
Isoparactis Stephenson, 1920 | 24 + incomplete cycle/6 | 1st cycle (6 pairs) | Distally | 2/2 | Well developed | Restricted to circumscribed | Up to 110 | Proximally or absent | Adherent rugae/smooth | Yes, with basitrichs and p-amastigophores | Spirocysts, basitrichs, microbasic p-amastigophores |
Anthoparactis n. gen. | 48/6 | 1st cycle (6 pairs) | 0 | 2/2 | Well developed | Circumscribed | 48 | No | Adherent rugae | Yes, with basitrichs only | Spirocysts, basitrichs, microbasic p-amastigophores |