scyphozoan


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scyphozoan

any marine medusoid COELENTERATE of the class Scyphoza, containing the jellyfish. The medusa is the dominant and sometimes only phase of the life history, the polyp being small (a SCYPHISTOMA) or absent.
References in periodicals archive ?
Cubozoan and scyphozoan jellyfishes of the Carolinian Biogeographic Province, southeastern USA.
In the more traditional sense, Lucas says, the term "jellyfish" applies just to the watery species in the stinging cnidarians, and she sometimes narrows even further to a subgroup called scyphozoans.
A fifth possible deposit exists in coeval strata of southern New Brunswick, in which more than a hundred discoidal to radial structures occur; these were informally described and hypothesized to represent composite molds of scyphozoan medusae (Pickerill 1982, 1990).
The scyphozoan solution involves the use of such a diffuse, non-polarized nerve net for distribution of motor commands (Mayer, 1910; Bozler, 1926a, b; Horridge, 1956a).
Since the statolith of both scyphozoan and cubozoan rhopalia is not organized into a recognizable statocyst-like structure, it is possible that the statolith functions as a weight to maintain a specific rhopalial orientation independent of orientation of the medusa, as demonstrated by Garm et al.
Induction of metamorphosis in the symbiotic scyphozoan Cassiopea andromeda: a role of marine bacteria and of biochemicals.
They captured the hydrozoans using dactyls at the tip of their pereiopods immediately after contact with the jellyfish, a predatory behavior very similar to that seen with the scyphozoans.
Nemopilema nomurai Kishinouye 1922 is one of the largest scyphozoan jellyfish, measuring 1-2 m in diameter and weighing 100-200 kg.
The giant jellyfish Nemopilema nomurai Kishinouye 1922 is one of the biggest scyphozoan jelly fishes in the world, attaining a bell diameter of 2 m and a wet weight of 200 kg (Kishinouye, 1922; Shimomura, 1959).
The morphological diversity of pelagic scyphozoan orders originated during the Cambrian (Willoughby and Robison, 1979; Hagadorn et al.
Hydrodynamic interactions during morphological stages of development may help explain the persistence of ontogenetic patterns across scyphozoan taxa.