1,721,280 research outputs found
Licciano, M. Giangrande, A. and Gambi, M. C. (2009) A new genus of Sabellidae (Annelida, Polychaeta) from Antartica, with discussion of relationships among plesiomorphic genera within Sabellinae. Zootaxa, 2226, 28-42.
No full textLICCIANO, M., GIANGRANDE, A., GAMBI, M. C. (2009): Licciano, M. Giangrande, A. and Gambi, M. C. (2009) A new genus of Sabellidae (Annelida, Polychaeta) from Antartica, with discussion of relationships among plesiomorphic genera within Sabellinae. Zootaxa, 2226, 28-42. Zootaxa 2247 (1): 68, DOI: 10.11646/zootaxa.2247.1.4, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2247.1.
Polychaete reproductive patterns, life cycles and life histories: an overview
No full textPresent knowledge of polychaete reproduction, developmental mode, gametogenesis patterns, sperm structure, and larval morphology are reported. Based on published data, some life-cycle and life-history traits are also examined and reviewed across families, in order to summarize the main life-style patterns. Polychaetes show a great diversity in reproductive traits, but some patterns can be found, and the families can be grouped within long-living iteroparous forms, semelparous forms, and short-living iteroparous forms, the first being the msot common strategy. Phylogenetic constraints seem to be present especially at family level, influencing the egg-size and/or the developmental mode. Each family shows a characteristic range of egg-size and a more common developmental mode, even though different developmental modes can be found within single families, reflecting the high plasticity of this group, and the probable independent evolution of developmental mode at family level. The importance of morphological constraints is also discussed
Observations on recruitment and growth of Eunice harasii Audouin and Milne Edwards (polychaeta, eunicidae) in the mediterranean sea
No full textPolychaete zonation and its relation to algal distribution down a vertical cliff in the western Mediterranea (Italy): a structural analysis
Full text linkThe zonation of polychaetes down a vertical cliff (0-5 m in depth) at Cape Romito, Leghorn, Italy, was investigated. The structural organization of the community changed with depth. A community typical of photophilic environments was found in the superficial zone (0-2 m), while in the deeper zone (3-5 m), a more diversified community characterized by species typical of sciaphilic environments was present. At the surface (0 m) the community was very poor in species and individuals and thus probably corresponds to the midlittoral fringe. In fact, some species typical of the midlittoral zone were found. This distribution pattern was constant for samples taken in February and August 1985. The distribution of polychaetes was closely related to that found for macroalgae. It is hypothesized that algae condition the substratum and that this is the main factor responsible for the zonation of polychaetes. © 1988
Occurrence of Fabricia filamentosa Day, 1963 (Polychaeta, Sabellidae, Fabricinae) in the Mediterranean Sea
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VALUTAZIONE E PROCESSO PROGETTUALE: UNA PROCEDURA DI SEGMENTAZIONE TRICOTOMICA PER LA VALUTAZIONE DI PROGETTI IN ARCHITETTURA
No full textA new species of sphaerosyllis (polychaeta, syllidae, exogoninae) from the coasts of italy and cyprus (eastern mediterranean sea)
No full textThe faunistic analysis of hard and soft benthic materials collected from the Marine Reserve of Porto Cesareo (Ionian Sea, Salento Peninsula, Italy) and the coast of northern Cyprus (Levant Sea) revealed a new species of Sphaerosyllis, S. boeroi sp. n. (Polychaeta, Syllidae, Exogoninae). This species is mainly characterized by having compound chaetae with discernable subdistal spine, a strong dorso-ventral gradation in size of blades throughout the body, elongated slender blades of superior compound chaetae on anterior and middle parapodia, parapodial glands with fibrillar material, and the distributional pattern of papillae on the body surface. Sphaerosyllis boeroi is described and compared to the other morphologically similar species, with emphasis on its ecological and reproductive patterns. © 2005 Taylor & Francis Group, LLC.Two of the Authors (L.M. and A.G.) wish to thank Drs Caterina Longo, Mariella Mercurio and Carlotta Nonnis Marzano from the University of Bari, and Dr. Cataldo Pierri from the University of Lecce for their help during the sampling phase. The other Author (M.E.Ç.) also thanks the crews and scientific personnel of the R/V K. PIRI REIS for their help in obtaining benthic samples, and TUBITAK (NATO-B1 Programme) for the financial support that enabled him to visit some research stations in Italy to make this collaboration possible. -
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