hydromedusa

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Related to hydromedusae: scyphistoma

hydromedusa

the MEDUSA of a HYDROZOAN.
References in periodicals archive ?
Thus, there are a number of improvements that can be made to the collection of jellyfish data in Argentina and Uruguay that would provide more reliable information not only about scypho- and cubomedusae, but also about macro hydromedusae such as Aequorea or Rhacostoma (A.
Our results show that cubomedusae can regenerate the most complex structures, but whether they can rival the tissue plasticity found in some hydromedusae (Piraino et al., 1996) is still to be tested.
(1977) on taxonomic composition; AraUjo (1982) on qualitative and quantitative aspects, with special reference to Hydromedusae; and Rocha (1978) and Nascimento and Rocha (1994) on general diversity and abundance.
3 Pastos marinos Thallasia testudinium, Syringodium filiforme, Halodule wrighti 4 Zooplancton Amphipoda, Cladocera, Copepoda, Crustacea (Larvas), Chaetognatha, Echinoidea, Euphasiacea, Foraminifera, Hydromedusae, Mollusca, Ostracoda, Polychaeta, Sergestida, Thaliacea.
Growth, reproduction and nutrition of some Barents Sea hydromedusae in natural aggregations.
The coordinated tentacular response in cubomedusae is similar to the crumpling response of hydromedusae that can be induced by stimulation of an exumbrellar conducting system and involves an excitable epithelium (Mackie and Passano, 1968; Spencer, 1975, 1978; Josephson and Schwab, 1979; Mackie, 2004b).
However, studies on jellyfish are limited exclusively to the work of Pages & Orejas (1999), who identified 31 species of medusae in this area: 29 hydromedusae and 2 scyphomedusae.
interruptus eat large food items: fish larvae, chaetognaths and hydromedusae. In the current study, the phyllosomas were fed with gonads of mollusk Brachyodonts sp.
Atlanticus TAXA n % n % PROTOZOA 12 0.69 Order Radiolaria 12 0.69 CNIDARIA 1 0.06 3 1.20 Subclass Siphonophorae 1 0.40 Subclass Hydromedusae 1 0.06 2 0.80 ANNELIDA 15 0.86 2 0.80 Class Polychaeta 15 0.86 2 0.80 MOLLUSCA 1 0.06 Order Pteropoda 1 0.06 CHAETOGNATHA 2 0.11 Sagitta sp.
Around 100 species (polyps and medusae) are reported from the state of Parana, of which 89 are hydrozoans (including hydromedusae, solitary and colonial hydroids), nine are scyphozoans (typical jellyfish) and two are cubozoans (box jellyfish) (Marques et al., 2003; Oliveira et al., in press).
In comparison, scyphomedusae possess rhopalia but without the connecting tracts of a nerve ring, while hydromedusae have a pair of complex nerve rings representing their centralized nervous systems (see Satterlie, 2011).
Abstract: Blackfordia virginica is an important hydromedusae in the zooplankton of coastal lagoons at Mexico.