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| Registros recuperados: 17 | |
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| Genzano, Gn; Zamponi, Mo. |
| The first studies on hydroids of the subantarctic region (SW Atlantic Ocean) were based on samples from expeditions to the Antarctic at the end of the 19th and beginning of the 20th centuries. In spite of these works, hydroids from the northern Argentine continental shelf remained unknown until the 1960s. In coastal waters off Mar del Plata, studies on hydroids have been few in number and limited to species described from preserved material. Even rudimentary ecological information is lacking in these reports. Over the past few decades, samples from oceanographic expeditions, and specimens collected directly from the intertidal rocky shore or by means of scuba diving and snorkeling, have provided heretofore unpublished information on hydropolyps of the Mar... |
| Tipo: Text |
Palavras-chave: Hydraires; Epibiosis; Distribution; Argentine; Atlantique sud-occidental; Hydroids; Epibiosis; Distribution; Argentina; SW Atlantic Ocean. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00322/43297/43033.pdf |
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| Russel, David J.; Hedgpeth, Joel W.. |
| The calyptoblast hydroids Aglaophenia struthionides (Murray, 1860), Eucopella (= Campanularia) everta (Clark, 1896), and Abietinaria spp. in the low intertidal zone at Mussel Point, Pacific Grove, Monterey Bay, California, often bear the adult pycnogonids Tanystylum duospinum Hilton, 1939 and Ammothea hilgendorfi (Böhm, 1879). Larval stages of these pycnogonids were found living and feeding on Eucopella everta. The larvae of Tanystylum duospinum are ectoparasitic. Those of Ammothea hilgendorfi are endoparasitic in the gastrovascular cavities of hydranths. Larvae of both species feed on the gut contents of Eucopella everta, often on the same hydroid colony. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Pycnogonids; Host; Hydroids; Ontogeny; Monterey Bay. |
| Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/504291 |
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| Peña Cantero, A.L.; Vervoort, W.. |
| The type material of Oswaldella billardi Briggs, 1938, has been re-examined and a complete description and figures are presented. The study of that material has allowed to reconsider the systematic position of all the material previously assigned to O. billardi and to determine that part of it belongs to another species. Since it is clearly different from the remaining species of the genus, it is described as Oswaldella erratum spec. nov. Resumen: Se ha revisado y redescrito el material tipo de Oswaldella billardi Briggs, 1938. Su estudio ha permitido reconsiderar la posición sistemática de todo el material anteriormente asignado a O. billardi y, así, determinar que parte del mismo pertenece a otra especie. Ya que dicha especie es claramente diferente de... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Oswaldella; New species; Antarctic; 42.72. |
| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/318245 |
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| 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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| Watson, J.E.; Vervoort, W.. |
| Seventy seamounts 50 to 100 km off South East Cape, southern Tasmania, rise from depths of 1000- 2000 m on the Australian continental slope. Sampling of the slopes of 14 seamounts was undertaken in 1997 by the Australian Commonwealth Scientific & Industrial Research Organisation (CSIRO). The collection yielded 14 species of hydroids, six of which are new, including two species of a new genus. Only Halecium fragile Hodgson, 1950, and Tripoma arboreum Hirohito, 1995, have previously been recorded from Tasmania. Other species are known from deep water off New Zealand, Japan and the south-western Atlantic. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Tasmania; Australia; Seamount; Hydroids; 42.79. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/219453 |
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| Peña Cantero, A.L.; García Carrascosa, A.M.; Vervoort, W.. |
| Two species of the antarctic hydroid genus Oswaldella Stechow, 1919, are considered. The first, described by Stepan'yants (1979) as a subspecies, O. billardi shetlandica, has been raised to specific level and will henceforth be indicated as Oswaldella shetlandica Stepan'yants, 1979. A second species is described as Oswaldella elongata spec. nov. Both species are differentiated against the remaining known species of Oswaldella; new records are added and the geographical distribution is discussed. Resumen: Se considera la posición sistemática de dos especies del género Oswaldella Stechow, 1919. Una de ellas, descrita por Stepan'yants (1979) como una subespecie de Oswaldella billardi Briggs, 1938, es elevada al nivel específico y pasa a denominarse Oswaldella... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Antarctic; New records; New species; 42.72. |
| Ano: 1995 |
URL: http://www.repository.naturalis.nl/record/318391 |
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| Vervoort, W.; Vasseur, P.. |
| INTRODUCTION Distribution and ecology of hydroids from coral reefs of high islands and atolls of French Polynesia so far have received little attention. Redier (1967, 1971) published a preliminary list of 14 species from Salvat's collections, sampled during several trips to Tahiti, Tuamoto (Mururoa, Reao and Maturei Vavao Atolls), to the Australes Islands (Rapa) and to Gambier. The present paper results from researches carried out by one of us (P.V.) concerning the benthic bionomy of reef sciophilous communities of hard bottoms. They have been carried out at Tiahura, Moorea, Society Islands (fig. IA) and on Takapoto Atoll, Tuamoto Archipelago (fig. 2A) in 1973 and 1974. They gave us occasion to compile a revised list of about 22 species of hydroids... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Hydroids; Ecology; Distribution; French Polynesia; 42.72. |
| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/323934 |
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| Peña Cantero, A.L.; Vervoort, W.. |
| Jäderholm's type of Schizotricha antarctica, collected by the Swedish Antarctic Expedition 1901-1903, is redescribed from a syntype in the collections of the Swedish National Museum, Stockholm. The type lot of that species proved to be composite, the material best resembling Jäderholm's (1904, 1905) descriptions and figures has been designated as the syntype. There are two more species in the type lot, that have also been described, but are too poorly represented to be either recognized as one of the described species of Oswaldella or to merit a new specific name; they have been indicated as Oswaldella spec. 1 and spec. 2. Resumen: Se ha revisado y redescrito el material tipo de Schizotricha antarctica Jäderholm, 1904, recogido durante la Swedish Antarctic... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Antarctic; Redescription of Oswaldella antarctica; New species; 42.72. |
| Ano: 1995 |
URL: http://www.repository.naturalis.nl/record/318099 |
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| Calder, D.R.; Maÿal, E.M.. |
| Hydroid distribution patterns along a horizontal ecocline in the Rio Formoso/Rio Ariquindá/Rio Porto Alegre system, a small and seasonally poikilohaline estuary on the tropical northeast coast of Brazil, were investigated. Collecting was undertaken during the dry season, in November 1993, by diving (with and without SCUBA). Nine stations were sampled on a transect extending from a reef outside the river mouth to a mangrove system at the upper end of the estuary. Four major regions were distinguished along the ecocline based on numerical analyses of hydroid species/station location data: (1) nearshore reef — a sandstone ledge outside the entrance of the estuary; (2) river mouth — a sandy and shelly flood-tidal delta area inside the entrance of the Rio... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cnidaria; Hydrozoa; Hydroids; Estuary; Zonation; Distribution; Ecology; Brazil.; 42.72. |
| Ano: 1998 |
URL: http://www.repository.naturalis.nl/record/317616 |
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| Registros recuperados: 17 | |
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