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Diversity of reproductive features in some Antarctic polynoid and sabellid polychaetes, with a description of Demonax polarsterni sp. n. (Polychaeta, Sabellidae) Gambi, M.C.; Patti, F.P.; Micaletto, G.; Giangrande, A. (2001). Diversity of reproductive features in some Antarctic polynoid and sabellid polychaetes, with a description of Demonax polarsterni sp. n. (Polychaeta, Sabellidae). Polar Biol. 24(12): 883-891. dx.doi.org/10.1007/s003000100287 In: Polar Biology. Springer-Verlag: Berlin; Heidelberg. ISSN 0722-4060; e-ISSN 1432-2056 Is gerelateerd aan: Gambi, M.C.; Patti, F.P.; Micaletto, G.; Giangrande, A. (2002). Diversity of reproductive features in some Antarctic polynoid and sabellid polychaetes, with a description of Demonax polarsterni sp. n. (Polychaeta, Sabellidae), in: Arntz, W.E. et al. (Ed.) Ecological studies in the Antarctic sea ice zone: results of EASIZ Midterm Symposium. pp. 24-32, meer

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Trefwoorden

Behaviour > Reproductive behaviour Interspecific relationships PSW, Weddell Sea Demonax Kinberg, 1867 [WoRMS]; Demonax polarsterni Gambi, Patti, Micaletto & Giangrande, 2001 [WoRMS]; Polychaeta [WoRMS]; Polynoidae Kinberg, 1856 [WoRMS]; Sabellida [WoRMS]; Sabellidae Latreille, 1825 [WoRMS] Weddell Sea [Marine Regions] Marien/Kust

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Auteurs		Top
Gambi, M.C. Patti, F.P. Micaletto, G. Giangrande, A.

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Abstract

The Polynoidae and Sabellidae represent two polychaete families with contrasting life habits and different phylogenetic constraints. Species of both families studied in this work were collected on the shelf of the Eastern Weddell Sea (Antarctica) during the EASIZ-I (1996) and EASIZ-II (1998) expeditions. Among the Polynoidae, three different species of the genus Harmothoe were observed to brood eggs under the dorsal elytra, which is an uncommon feature in this family. The egg size of all brooding taxa ranged between 120 and 216 µm. Three Sabellidae species were studied: Myxicola cf sulcata is gonochoric with eggs among the largest (up to 1000 µm) recorded for the sabellids. Eggs, as well as larvae, are incubated within the branchial crown, a feature newly discovered for the genus Myxicola. Demonax polarsterni n. sp. (a newly discovered taxon) and Euchone pallida are gonochoric and possess relatively large eggs (350 µm and 270 µm, respectively). In comparison with cogeneric species of temperate areas, the Antarctic Sabellidae have larger egg dimensions and egg brooding that seems unconstrained by adult size.

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