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	Provedor de dados Naturalis (1) OMA (1) Autor Boero, F. (2) Bouillon, J. (2) Denitto, F. (1) Gravili, C. (1) Miglietta, M.P. (1) Pagliara, P. (1) Piraino, S. (1) Tommasa, L.D. (1) Mais... Palavra-chave Anthomedusae (2) Hydrozoa (2) 42.72 (1) Classification (1) Cnidaria (1) Cnidaria [cnidarians] (1) Heterochrony (1) Leptomedusae (1) Life cycle (1) Paedomorphosis. (1) Phylogeny (1) Mais... Tipo do documento Article / Letter to the editor (1) Info:eu-repo/semantics/article (1) Ano 2000 (1) 1998 (1) País Belgium (1) Netherlands (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Heterochrony, generic distinction and phylogeny in the family Hydractiniidae (Hydrozoa: Cnidaria) Naturalis Boero, F.; Bouillon, J.; Piraino, S.. The taxonomy of Hydractinia, Stylactaria and Podocoryna is discussed and the three genera are merged into Hydractinia since their diagnostic characters are liable to lead to polyphyly and paraphyly, due to repeated episodes of medusa reduction via heterochrony (paedomorphosis). The phylogeny of the Hydractiniidae is reconstructed by using two outgroups, Clava and Cytaeis, both having some characters in common with the Hydractiniidae. The resulting phylogenetic trees agree in identifying affinities among Hydractinia, Kinetocodium and Hydrocorella, all with polymorphic colonies with gastrozooids having oral tentacles. The position of Clavactinia (characterized by gastrozooids with widely scattered tentacles) is at the root of the tree if Clava is the... Tipo: Article / Letter to the editor Palavras-chave: Cnidaria; Hydrozoa; Anthomedusae; Phylogeny; Life cycle; Classification; Heterochrony; Paedomorphosis.; 42.72. Ano: 1998 URL: http://www.repository.naturalis.nl/record/317695 Approaches to the ethology of hydroids and medusae (Cnidaria, Hydrozoa) OMA Miglietta, M.P.; Tommasa, L.D.; Denitto, F.; Gravili, C.; Pagliara, P.; Bouillon, J.; Boero, F.. The behavioural patterns of 26 species of Antho- and Leptomedusae (with or without medusa stage) were investigated by video recordings. The analysed activities were: answers to mechanical stimuli, prey capture and ingestion, digestion, egestion, and swimming. The quantity of behavioural patterns identified in the small number of hydrozoan diversity studied so far is sufficient to demonstrate that these supposedly "simple" animals have evolved a complex array of responses to both external and internal stimuli. Tipo: Info:eu-repo/semantics/article Palavras-chave: Anthomedusae; Cnidaria [cnidarians]; Hydrozoa; Leptomedusae. Ano: 2000 URL: http://www.vliz.be/imisdocs/publications/232610.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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