Medusozoa

Belongs within: Cnidaria.Contains: Staurozoa, Cubozoa, Scyphozoa, Limnomedusae, Narcomedusae, Trachymedusae, Halammohydra, Thecata, Capitata, Filifera, Codonophora. The Medusozoa are the clade of cnidarians in which a medusa, whether free or reduced, is the normal sexual adult stage of the life cycle and a polyp (if present) functions as the larval stage (Petersen 1979). Subgroups include the Hydrozoa… Continue reading Medusozoa

Sertularia

Belongs within: Sertulariidae. Sertularia is a genus of colonial hydroids in which the hydrothecal operculum is divided with the abcauline component being movable (Ralph 1961). Characters (from Ralph 1961): Erect stems branched or simple, monosiphonic; hydrothecae in opposite or subopposite pairs or alternate; margin usually with two abcauline teeth between each of which there is… Continue reading Sertularia

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Categorised as Medusozoa

Tubulariida

Belongs within: Capitata.Contains: Corynoidea, Tubulariidae. The Tubulariida are a group of hydroids characterised by the tendency for the oral whorl(s) of tentacles to become emphasised over the aboral tentacles. The majority (at least) of tubulariidans may form a clade Aplanulata, characterised by the absence of a ciliated planula larva (Daly et al. 2007). Characters (from… Continue reading Tubulariida

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Categorised as Medusozoa

Capitata

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

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Categorised as Medusozoa

Tubulariidae

Belongs within: Tubulariida. The Tubulariidae include both solitary and colonial hydroids in which the tentacles of both whorls are filiform and a stem parenchyma including central and peripheral canals is present (Petersen 1979). <==Tubulariidae |–Zyzzyzus solitarius (Warren 1906)P79 |–Ectopleura Agassiz 1862P79 | |–*E. dumortieri (van Beneden 1844)P79 | |–E. crocea (Agassiz 1862)P79 [=Tubularia croceaP79; incl.… Continue reading Tubulariidae

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Categorised as Medusozoa

Scyphozoa

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

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Categorised as Medusozoa

Codonophora

Belongs within: Medusozoa. The Codonophora is a clade within the siphonophores characterised by the presence of nectosomes, bell-shaped zooids specialised for swimming, and gelatinous shield-like bracts (these latter lost in some subgroups) (Dunn et al. 2005). <==Codonophora [Brachystelia, Physonectae] | i. s.: Lychnagalma utricularia [incl. L. vesicularia]DPH05 | Discolabe quadrigataH04 | Strobalia cupolaH04 |–ApolemaDPH05 [ApolemidaeDB07]… Continue reading Codonophora

Published
Categorised as Medusozoa