Table 2. Occurrence (% cover) of hydroid species on pelagic Sargassum species and morphotypes, and on benthic S. polyceratium var. ovatum from Puerto Morelos, Quintana Roo.
| Taxon | Annual average of the percentage of cover | Sargassum species | Sargassum regions with hydroids | Previous records in pelagic and benthic Sargassum species | ||
|---|---|---|---|---|---|---|
| Axes | Leaves | Aerocysts | ||||
| Superorder “Anthoathecata” Cornelius, 1992 | ||||||
| Order Capitata Kühn, 1913 | ||||||
| Zancleidae Russell, 1953 | ||||||
| Zanclea alba (Meyen, 1834)001569 | 1.33 | Sn I | x | x | x | Sf, Sn (4) |
| 0.36 | Sn VIII | x | x | |||
| Superorder Leptothecata Cornelius, 1992 | ||||||
| Order Macrocolonia Leclère, Schuchert, Cruaud, Couloux & Manuel, 2009 | ||||||
| Suborder Plumupheniida Maronna, Miranda, Peña Cantero, Barbeitos & Marques, 2016 | ||||||
| Halopterididae Millard, 1962 | ||||||
| Halopteris diaphana (Heller, 1868)001564 | 0.32 | Sf III | x | x | Sc (9); Sfu (10); Sf, Sn (4) | |
| 2.32 | Sn I | x | x | |||
| 0.17 | Sn VIII | x | ||||
| Halopteris spp. | 1.28 | Sn I | x | |||
| Plumulariidae McCrady, 1859 | 0.03 | Sf III | x | |||
| Plumularia strictocarpa Pictet, 1893001566 | 1.64 | Sf III | x | x | x | Sc (9); Sf, Sn (4); Sh, St, Sto (2); Sfu (8) |
| 0.92 | Sn I | x | x | x | ||
| Aglaopheniidae Marktanner-Turneretscher, 1890 | ||||||
| Aglaophenia latecarinata Allman, 1877001561 | 62.24 | Sn VIII | x | x | x | Sc (9, 10); Sf (4); Sf III (11); Sfu (10), Sn I (11); Sn VIII (11) |
| Suborder Sertulariida Maronna, Miranda, Peña Cantero, Barbeitos & Marques, 2016 | ||||||
| Sertulariidae Lamouroux, 1812. | ||||||
| Tridentata marginata (Kirchenpauer, 1864)001567 | 46.00* | Spo | x | x | Ss (6); Sc (8, 9, 10) | |
| Tridentata turbinata (Lamouroux, 1816)001568 | 28.70* | Spo | x | x | x | Sc (8, 9, 10); Sfu (8, 10) |
| Order Statocysta Leclère, Schuchert, Cruaud, Couloux & Manuel, 2009 | ||||||
| Suborder Proboscoida Broch, 1910 | 3.99 | Sf III | x | x | ||
| 0.06 | Sn I | x | ||||
| Clytiidae Cockerell, 1911 | ||||||
| Clytia hemisphaerica (Linnaeus, 1767)001562 | 5.0 | Sn VIII | x | x | x | Sa (5); Sf, Sn (4); Ss (6); Sc, Sfu (8) |
| Clytia noliformis (McCrady, 1859)001563 | 36.63 | Sf III | x | x | x | Sf X (1); Sf (4); Sfu (8, 10); Si (7); Sn I, Sn II, Sn VIII, Sn IX (1); Sn (3, 4); Ssw (7) |
| 15.08 | Sn I | x | x | x | ||
| 0.22 | Sn VIII | x | ||||
| Clytia spp. | 5.52 | Sn I | x | x | x | |
| Obeliidae Haeckel, 1879 | ||||||
| Obelia dichotoma (Linnaeus, 1758)001565 | 0.06 | Sf III | x | Sh (2); Sa (5); Sc (8, 9, 10); Sfu (8, 10) | ||
| 1.07 | Sn I | x | x | x | ||
| Obelia spp. | 0.59 | Sn I | x | |||
Notes:
Average of the percentage of cover, only considering the two months in which S. polyceratium var. ovatum was collected. Superindex indicate the catalog number of epibiont hydroids deposited in the collection.
Sa, Sargassum acinarium (Linnaeus) Setchell; Sc, Sargassum cymosum C. Agardh; Sf, Sargassum fluitans (Bøergesen) Bøergesen; Sf III, Sargassum fluitans III; Sfu, Sargassum cf. furcatum Kutzing; Sh, Sargassum hemiphyllum (Turner) C. Agardh; Si, Sargassum ilicifolium (Turner) C. Agardh; Sn, Sargassum natans (Linnaeus) Gaillon; Sn I, Sargassum natans I; Sn II, Sargassum natans II; Sn VIII, Sargassum natans VIII; Sn IX, Sargassum natans IX; Spo, Sargassum polyceratium var. ovatum (Collins) W.R. Taylor; Ss, Sargassum stenophyllum (undefined authority); Ssw, Sargassum swartzii C.Agardh; St, Sargassum thunbergii (Merten ex Roth) Kuntze; Sto, Sargassum tortile (C. Agardh) C. Agardh. (1) Parr (1939), (2) Nishihira (1965), (3) Ryland (1974), (4) Calder (1995), (5) Morri & Bianchi (1999), (6) Haddad & Chiaverini (2000), (7) Moazzam & Moazzam (2006), (8) Oliveira, Marques & Migotto (2006), (9) Cunha & Jacobucci (2010), (10) Oliveira & Marques (2011) and (11) Govindarajan et al. (2019). x, presence.