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New combinations for two coronate polyp species (Atorellidae and Nausithoidae, Coronatae, Scyphozoa, Cnidaria) Naturalis
Morandini, A.C.; Jarms, G..
Within the order Coronatae, six valid species remain known only by their polyp stage. The inability to relate them to any medusae genera of the group is a problem that remains to be solved in the order. With the examination of type specimens, we reassign the species Stephanoscyphistoma sibogae and S. striatus to the genera Atorella and Nausithoe respectively.
Tipo: Article / Letter to the editor Palavras-chave: Atorella; Nausithoe; Polyp; Scyphistoma; Stephanoscyphistoma; Stephanoscyphus; Systematics; Taxonomy; 42.79.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/214344
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Monobrachium parasitum (Cnidaria: Hydrozoa) epizoic on antarctic bivalves and its bipolarity Naturalis
Jarms, G.; Mühlenhardt-Siegel, U..
During antarctic macrozoobenthos research, colonies of Monobrachium were found on small bivalves. The species problem of the genus Monobrachium is discussed and it is stated that there are three species. However, the widespread species Monobrachium parasitum might be a species-complex comprising several species. This can only be confirmed by rearing experiments and/or molecular investigations. Host specificity and the factors influencing the infection of the bivalve species are shown. The impact of the infection is demonstrated to be harmful to the host bivalve, although not of a parasitic nature. The phenomenon of bipolarity within the genus Monobrachium is discussed.
Tipo: Article / Letter to the editor Palavras-chave: Hydroids; Monobrachium; Bivalves; Symbiosis; Ecology; Bipolarity.; 42.72; 42.73.
Ano: 1998 URL: http://www.repository.naturalis.nl/record/317784
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