Hydrozoa of the Eurasian Arctic Seas

Stepanjants, Sofia D.

doi:10.1007/978-1-4613-0677-1_16

Cited by 27 publications

(25 citation statements)

References 6 publications

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“…Rhizogeton ezoense Yamada, 1964, best known from the northwest North Pacific (Hirohito 1988) but also reported from the northeast North Pacific (Brinckmann-Voss 1996), has been regarded by some (Antsulevich & Polteva 1986;Antsulevich 1987Antsulevich , 2015Park 1997) as conspecific or likely conspecific with R. fusiformis. Rhizogeton fusiformis and R. nudus have long been maintained as distinct species (e.g., Kramp 1911;Dons 1012;Calder 1972;Antsulevich & Polteva 1986;Stepanjants 1989;Schuchert 2001aSchuchert , 2004Schuchert , 2012Ronowicz et al 2013;Antsulevich 2015) even though there is little to separate them morphologically. If the conclusion of Park (1997) is correct that they are conspecific, the range of the species would be extended well beyond the western North Atlantic.…”

Section: Reports Of Hydroids From the East Coast Of North America Datmentioning

confidence: 99%

Additions to the hydroids (Cnidaria, Hydrozoa) of the Bay of Fundy, northeastern North America, with a checklist of species reported from the region

Calder

2017

Zootaxa

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Two new species of hydroids, Eudendrium bleakneyi and Halecium praeparvum, are described from the Bay of Fundy. Fourteen others, Tubularia acadiae Petersen, 1990, Coryne pusilla Gaertner, 1774, Sarsia lovenii (M. Sars, 1846), Zanclea implexa (Alder, 1856), Corydendrium dispar Kramp, 1935, Rhizogeton fusiformis L. Agassiz, 1862, Bougainvillia muscus (Allman, 1863), Rhizorhagium roseum M. Sars, in G.O. Sars, 1874, Hydractinia symbiolongicarpus Buss & Yund, 1989, Eudendrium vaginatum Allman, 1863, Tiaropsis multicirrata (M. Sars, 1835), Obelia bidentata S.F. Clark, 1875, Halecium marsupiale Bergh, 1887, and Sertularella gigantea Hincks, 1874, are reported, with collection data, for the first time from the bay. All but Coryne pusilla, Rhizorhagium roseum, Eudendrium vaginatum, and Sertularella gigantea are also new to Atlantic Canada, while Zanclea implexa, Corydendrium dispar, and Halecium marsupiale are reported for the first time in the western North Atlantic. Two of those species, Hydractinia symbiolongicarpus and Obelia bidentata, are disjunct in distribution, with core populations occurring in warmer waters to the south of Cape Cod, Massachusetts. Both were discovered in Minas Basin, a hydrographically distinct embayment where surface water temperatures are much warmer during summer than in the perpetually cold lower Bay of Fundy. Rhizorhagium roseum and the subfamily Rhizorhagiinae are transferred from family Bougainvilliidae Lütken, 1850 to Pandeidae Haeckel, 1879. An annotated checklist of hydroids from the Fundy region, based on previously published reports and on new records of species, is added as an appendix. Included in the checklist are 43 species of anthoathecates and 75 species of leptothecates, referable to 30 families and 56 genera. Families with the most species were Sertulariidae (23), Haleciidae (13), Eudendriidae (11), and Obeliidae (10). Biogeographically, the aggregate hydroid fauna of the bay conforms with that occurring in other parts of the Western Atlantic Boreal Region. Halecium permodicum is proposed as a replacement name for Halecium minor Fraser, 1935, an invalid junior homonym of H. minor Pictet, 1893.

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Section: Reports Of Hydroids From the East Coast Of North America Datmentioning

confidence: 99%

Additions to the hydroids (Cnidaria, Hydrozoa) of the Bay of Fundy, northeastern North America, with a checklist of species reported from the region

Calder

2017

Zootaxa

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“…As noted earlier, Stepanjants et al (1996Stepanjants et al ( , 1997a discussed the bipolar distribution of Cnidaria: Medusozoa (Hydrozoa, Siphonophora and Scyphozoa; Anthozoa not discussed) based on numerous publications by taxonomists and faunists who have been working with these groups of invertebrates (Chun 1897;Vanhö ffen 1902Vanhö ffen , 1906Maas 1906Maas , 1909Broch 1910;Stepanjants 1967Stepanjants , 1979Stepanjants , 1989Antsulevitch 1987;Margulis 1989;Van der Spoel 1991;Svoboda et al 1995;Stepanjants et al 1997aStepanjants et al , 2004Sheiko & Stepanjants 1997a,b;Jarms & Mü hlenhardt-Siegl 1998;. General faunistic and biogeographical investigations were carried out by Derjugin (1915), Bergh (1947 and Ushakov (1958).…”

Section: Peculiarities Of the Bipolar Distribution Of Medusozoamentioning

confidence: 99%

“…The identification of species that were previously assumed to be bipolar is no longer trustworthy. For example, the Hydrozoa species Campanularia verticillata (Linnaeus, 1758), mentioned by Derjugin (1915) and Bergh (1947) as a ''classically bipolar'' species, in reality has another areal distribution, and it now belongs to the family Campanulariidae and is named Rhizocaulus verticillatus (Linnaeus, 1758) (Stechow 1919;Cornelius 1982Cornelius , 1995aStepanjants 1989). Its distribution may be classified as Arctic Á boreal, and is only restricted to the northern hemisphere.…”

Section: Peculiarities Of the Bipolar Distribution Of Medusozoamentioning

confidence: 99%

“…Most of the 15 known species inhabit the temperature interval 2.4 Á 118C, and are restricted to significant depths. Stepanjants (1989) reported that Candelabrum phrygium (Fabricius, 1780) inhabits and reproduces in the northern hemisphere at temperatures between Á 1 and 78C. The other species of this genus are restricted to the southern hemisphere, where they inhabit mainly Subantarctic waters with temperatures between 0.5 and 58C.…”

Section: Peculiarities Of the Bipolar Distribution Of Medusozoamentioning

confidence: 99%

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A review of bipolarity concepts: History and examples from Radiolaria and Medusozoa (Cnidaria)

Stepanjants

Cortese

Kruglikova

et al. 2006

Marine Biology Research

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Bipolarity, its history and general interpretation are investigated and discussed herein. Apart from the classical view, namely that a bipolar distribution is a peculiar biogeographical phenomenon, we propose that it is ecologically controlled too. This approach was used for bipolarity assessment within the following groups: Phaeodaria, Nassellaria, Spumellaria (Radiolaria) and Medusozoa (Cnidaria). We recognize 46 bipolar radiolarian species and three radiolarian genera. However, although species concepts in radiolarians are relatively stable and well known, the high-rank taxonomy of radiolarians is still not well defined. Caution should therefore be taken in the interpretation of distribution data at a taxonomic level higher than the species. In the Medusozoa, bipolarity is observed for 23 species and 32 genera. The different ways in which bipolarity can develop are discussed under the different groups, but preference has been given to the recent and most probable routes of migration. In our investigation of the bipolarity phenomenon, we reviewed more than 400 articles dealing with taxonomy, ecology and biogeography of the modern fauna in both groups.

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“…According to Panteleeva et al (1999), P. polaris is definitely a cold-water species. Its bathymetric range of occurrence is between 10 m (Kramp 1947) and 2500 m (Stepanjants 1989).…”

Section: Ecologymentioning

confidence: 99%

Glaciambulata neumayeri gen. et sp. nov., a new Antarctic trachymedusa (Cnidaria: Hydrozoa), with a revision of the family Ptychogastriidae

Galea

Roder

Walcher

et al. 2016

EJT

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Abstract.A new genus and species of sympagic trachymedusa, Glaciambulata neumayeri gen. et sp. nov., are described based on material from Antarctica. Its generic features are compared to those of its relatives, Ptychogastria Allman, 1878 and Tesserogastria Beyer, 1959, and a review of the family Ptychogastriidae Mayer, 1910, based on literature data, is provided. From this, it results that the poorlyknown Pectis antarctica Haeckel, 1879, formerly assigned to Ptychogastria by a number of authors, displays all characters of the contemporary rhopalonematid genus Voragonema Naumov, 1971. It is additionally demonstrated that V. laciniata Bouillon et al., 2001 is coterminous with P. antarctica, a finding that clarifies, 137 years later, the morphology and the taxonomic status of Haeckel's medusa. In accordance with the Principle of Priority, Pectis is recognized as the valid name of the genus, and Voragonema is assigned to its synonymy. Similarly so, the specific name introduced by Haeckel has priority over laciniata.

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Hydrozoa of the Eurasian Arctic Seas

Cited by 27 publications

References 6 publications

Additions to the hydroids (Cnidaria, Hydrozoa) of the Bay of Fundy, northeastern North America, with a checklist of species reported from the region

Additions to the hydroids (Cnidaria, Hydrozoa) of the Bay of Fundy, northeastern North America, with a checklist of species reported from the region

A review of bipolarity concepts: History and examples from Radiolaria and Medusozoa (Cnidaria)

Glaciambulata neumayeri gen. et sp. nov., a new Antarctic trachymedusa (Cnidaria: Hydrozoa), with a revision of the family Ptychogastriidae

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