Category: Medusozoa

Belongs within: Statocysta. The Proboscidoidea are a group of hydroids possessing a flared hypostome forming a pregastric cavity (Daly et al. 2007). Proboscidoidea [Campanulariidae]DB07 | i. s.: PhialuciidaeDB07 | Ophiodes mirabilisH04 | Hypanthea hemisphaericaH04 |–+–+–‘Campanularia’ hincksiiLS09 | | `–‘Orthopyxis’ evertaLS09 | `–+–+–Silicularia roseaLS09 | | `–OrthopyxisLS09 | | |–O. sargassicolaLS09 | | `–+–‘Campanularia’ crenataLS09 | | `–O. integraLS09… Continue reading Proboscidoidea

Belongs within: Scyphozoa. The Ulmaridae are a family of jellyfish with simple or branched radial canals joining a marginal ring canal. Characters (Raskoff & Matsumoto 2004): Gastric cavity with peripherally radiating canals (either simple or branched) which join marginal ring canal. Oral arms either broad and curtain like or narrow and tapering; lips usually with nematocyst-lined papillae… Continue reading Ulmaridae

Belongs within: Medusozoa. The Codonophora are a clade within the siphonophores characterised by the presence of nectosomes, bell-shaped zooids specialised for swimming, and gelatinous shield-like bracts; these latter are lost in some subgroups (Dunn et al. 2005). They have been divided between the Physonectae, with a small apical pneumatophore, and the Calycophorae, lacking a pneumatophore,… Continue reading Codonophora

Belongs within: Medusozoa.Contains: Rhizostomeae, Ulmaridae, Pelagiidae, Periphyllidae. The Scyphozoa are a group of cnidarians including the typical jellyfish and related taxa, united by the presence of polydisc strobilation in metamorphosing polyps (further modified in some rhizostomes), rhopalia and ephyrae. Most scyphozoans have a life-cycle alternating between a sexually reproducing planktonic medusa and an asexually reproducing… Continue reading Scyphozoa

Belongs within: Macrocolonia. The Plumulariidae are a family of hydrozoans in which paired nematothecae are either absent or never fused with the hydrothecae. Plumulariidae [Plumulariinae]    |–Schizotricha Allman 1883VV77    |–Halicornopsis elegans (Lamarck 1816) (see below for synonymy)B14    |–Thecocaulus Bale 1915VV77    |–Dentitheca bidentataLS09    |–HalicornariaB14    |    |–H. baileyiB14    |    `–H. furcata [incl. H. intermedia Bale 1914, H. furcata var. intermedia]B14    `–Plumularia Lamarck 1816 [incl. Heteroplon Allman 1877]VV77         |  i. s.:… Continue reading Plumulariidae

Belongs within: Macrocolonia.Contains: Sertularella, Sertularia. The Sertulariidae are a family of hydrozoans possessing erect colonies and sessile hydrotheca with a hinged operculum. Sertulariidae    |–+–SertularellaLS09    |  `–Thyroscyphus Allman 1877LS09, R61 [Thyroscyphidae, Thyroscyphinae]    |       |–T. fruticosus (Esper 1830) (see below for synonymy)R61    |       `–T. marginatusLS09    `–+–‘Dynamena’ moluccanaLS09       `–+–Salacia Lamouroux 1816 non L. 1771 (ICBN)LS09, R61          |    |–S. bicalycula (Coughtrey 1876) (see below for synonymy)R61          |    |–S. buski (Allman 1876)… Continue reading Sertulariidae

Belongs within: Tubulariida. The Corynoidea are hydrozoans in which both stenotele and desmoneme nematocysts are present in medusae but only stenoteles are present in polyps (Petersen 1979). Characters (Petersen 1979): Medusa with stenoteles and desmonemes; polyp with stenoteles only, capitate oral tentacles may be present in one whorl or spread down hydranth, aboral tentacles filiform (often reduced);… Continue reading Corynoidea

Belongs within: Medusozoa.Contains: Tubulariida, Zancleida. The Capitata are a group of hydrozoans united by the possession of stenotele nematocysts and capitate tentacles (ending in knobs) on the polyps or filiform tentacles in separated whorls (Daly et al. 2007). Members of the suborder Moerisiida possess a single, more or less scattered whorl of moniliform tentacles on… Continue reading Capitata

Belongs within: Medusozoa.Contains: Hydractinioidea. The Filifera are a group of hydrozoans characterised by the possession of filiform tentacles on the feeding polyps, together with desmoneme and eurytele nematocysts. Desmoneme nematocysts are, however, absent in the Eudendriidae which also possess a styloid gonophore and trumpet-shaped hypostome (Daly et al. 2007). <==Filifera    |–Eudendriidae [Eudendriida, Eudendrioidea]P79    |    |–Myrionema Pictet 1893 non… Continue reading Filifera