Saint-Pierre-du-Chemin, France
Saint-Pierre-du-Chemin, France

Time filter

Source Type

Galea H.R.,Hydrozoan Research Laboratory | Schories D.,Austral University of Chile
Zootaxa | Year: 2012

Twenty one species of shallow-water, benthic hydrozoans, belonging to nine families and fourteen genera, were found in a collection gathered from King George Island, South Shetland islands, during 2010 and 2011. Hydractinia angusta Hartlaub, 1904, Staurocladia charcoti (Bedot, 1908), Candelabrum penola (Manton, 1940), Orthopyxis norvegiae (Broch, 1948), and Silicularia pedunculata (Jäderholm, 1904) are redescribed. Additional notes are provided on Schizotricha turqueti Billard, 1906. Sertularella gaudichaudi (Lamouroux, 1824) is recognized as one of the most widely-distributed member of its genus in Antarctic waters. Taxonomic notes and updated synonymy are provided for some species. Copyright © 2012 · Magnolia Press.


Galea H.R.,Hydrozoan Research Laboratory | Schories D.,Austral University of Chile
Zootaxa | Year: 2012

This report supplements a series of earlier accounts on the hydrozoan fauna of Chile, and discusses 34 species of hydroids and one hydromedusa. The available collection was gathered from three distinct biogeographical regions: the southern border of the Peruvian Province around Punta de Choros, the southern Intermediate Zone around Corral, and the northern and southern parts of the Magellan Province, around Reloncaví Sound and in the Strait of Magellan, respectively. All the species are fully illustrated and, when necessary, data on the cnidome composition are provided. Six species, Halecium annuliforme, Sertularella curvitheca, Sertularella mixta, Symplectoscyphus patagonicus, Halopteris plumosa, and Clytia reloncavia, are described as new. The gonothecae of Halecium fjordlandicum Galea, 2007, Symplectoscyphus magellanicus (Marktanner-Turneretscher, 1890), and Campanularia hartlaubi (El Beshbeeshy, 2011) are described for the first time, while those of Kirchenpaueria curvata (Jäderholm, 1904) were rediscovered and are accurately redescribed. Morphological differences between C. hartlaubi and C. lennoxensis (Jäderholm, 1903), two species with similar trophosomes, are highlighted. Large, fertile specimens of Halecium pallens Jäderholm, 1904, as well as a female colony of Hydractinia parvispina Hartlaub, 1905, allowed new redescriptions to be made. Due to insufficient taxonomic information on several species created more than a century ago, two Chilean records are doubtfully assigned to Sertularella implexa (Allman, 1888) and Sertularella lagena Allman, 1876, respectively, the former represented by fertile specimens, and thus allowing the first description of its gonothecae. The long history of the confused taxonomy of South American "Symplectoscyphus subdichotomus (Kirchenpauer, 1884)" is now entirely settled. All the available records are confidently assigned to the synonymy of Symplectoscyphus filiformis (Allman, 1888), whose sexual dimorphism of gonothecae, first indicated by Totton (1930), is confirmed in light of the present material. Five species represent new records for the country: Staurocladia vallentini (Browne, 1902), Samuraia tabularasa Mangin, 1991, H. pallens, Sertularella blanconae El Beshbeeshy, 2011, and Symplectoscyphus paraglacialis El Beshbeeshy, 2011, the latter two being redescribed. Due to the scarcity of available material and the lack of gonophores of both sexes, six species of Eudendrium Ehrenberg, 1834 could be identified to genus only. Similarly, a species of Sertularella Gray, 1848 and two belonging to Symplectoscyphus Marktanner-Turneretscher, 1890, are awaiting reliable identifications based on fertile specimens. A species of Clytia Lamouroux, 1812 could not be determined to species in the absence of life cycle studies. Copyright © 2012 · Magnolia Press.


Galea H.R.,Hydrozoan Research Laboratory | Ferry R.,University of the French West Indies and Guiana | Ferry R.,CEA DAM Ile-de-France | Bertot J.-M.,Oceanvironnement
Zootaxa | Year: 2012

Gonothecae of both sexes and the non-released medusoids of Dentitheca dendritica (Nutting, 1900) are described for the first time. The genus Nemalecium Bouillon, 1986 is enriched through the discovery of a second species, N. gracile sp. nov., in Martinique, Lesser Antilles. Morphological data and comparison with material provisionally assigned to N. lighti (Hargitt, 1924) are provided. The mono- or dioecious colonies of N. gracile produce a swimming cryptomedusoid gonophore. The cnidome of Nemalecium is shown to comprise not only pseudostenoteles and microbasic mastigophores, but also two additional nematocyst types unreported so far. Copyright © 2012 · Magnolia Press.


This report supplements an earlier account on the hydroids of the Guadeloupe archipelago, and records 31 additional species of thecates. Among them, Halecium calderi sp. nov., Antennella armata sp. nov., and Antennella incerta sp. nov., are described. Laomedea tottoni Leloup, 1935 is redescribed and reassigned to the genus Clytia Lamouroux, 1812. Its synonymy is broadened upon inclusion of Clytia laxa Fraser, 1937. Hebella venusta (Allman, 1877) is considered valid based on comparison with related species, and its gonotheca is described for the first time. Two sympatric varieties of Sertularella diaphana (Allman, 1885), easily separable morphologically and by their cnidome composition, are discussed. Sertularella ornata Fraser, 1937 is recorded for the second time and is fully redescribed. Its name is actually a junior synonym of S. fusiformis (Hincks, 1861) f. ornata Broch, 1933, and it is here referred to as S. fraseri nom. nov.Sertularia thecocarpa Jarvis, 1922, Sertularella minuscula Billard, 1924, Sertularella parvula Mammen, 1965, and Sertularia stechowi Hirohito, 1995 are placed in the synonymy of Sertularella tongensis Stechow, 1919, the latter being transferred to the genus Sertularia Linnaeus, 1758. Sertularia ephemera nom. nov. is proposed as a replacement name for Sertularia tongensis Stechow, 1919. Aglaophenia postdentata Billard, 1913 is confidently recorded from the Atlantic for the first time. Dentitheca dendritica (Nutting, 1900) is redescribed, and additional notes on Macrorhynchia clarkei(Nutting, 1900) are provided. All the species discussed herein are new records for the study area. Illustrations are given for each species and data on the nematocyst complement and size of capsules are given when necessary. The number of hydroid species reported from the study area is raised to more than eighty. Hydroids of the Caribbean are moderately well known faunistically, though continuous discovery of new species is likely, the species composition being certainly richer than currently reported. Copyright © 2010. Magnolia Press.


Galea H.R.,Hydrozoan Research Laboratory | Ferry R.,University of the French West Indies and Guiana
Revue Suisse de Zoologie | Year: 2015

The present report supplements a series of earlier accounts on the hydrozoan fauna of the French Lesser Antilles, and discusses 16 species of hydroids from Martinique. Of these, five are new to science: Hydractinia promiscua, Halecium plicatum, Dynamena bimorpha, Antennella quaterna and Monostaechas bertoti. The medusoid gonophores of Ralpharia gorgoniae Petersen, 1990 are described in detail. The female gonothecae of Halecium labiatum Billard, 1933, recorded for the second time, are redescribed. Characters of the trophosome and the cnidome composition allowed a reliable identification of Halecium lightbourni Calder, 1991, a species whose previously unknown gonothecae are here described for the first time. A reexamination of the type of Dynamena tropica Stechow, 1926 proved that it is conspecific with D. crisioides Lamouroux, 1824. Sertularia notabilis Fraser, 1947 is included in the synonymy of S. hattorii Leloup, 1940, and arguments for doing so are provided. The so called variety pusilla Ritchie, 1910, associated for a long time with Hincksella cylindrica (Bale, 1888), is raised to species, as H. pusilla (Ritchie, 1910), and their distinguishing characters are emphasized. Clytia edentula Gibbons & Ryland, 1991 is found for the second time, extending its known range of distribution.


Galea H.R.,Hydrozoan Research Laboratory | Di Camillo C.G.,Marche Polytechnic University
Marine Biodiversity | Year: 2016

A hydroid, originally described from the Kei Islands, Moluccas, as Halicornaria allmani (sic!) Marktanner var. sibogae Billard, 1913, was recently rediscovered at two additional Indonesian localities. Since it proves morphologically different from its western Atlantic counterpart, Gymnangium allmanii (Marktanner-Turneretscher, 1890), it is confidently raised to species as G. sibogae (Billard, 1913). Its morphological features are fully described and illustrated, and are compared with those of other poorly-known nominal species of the genus, notably G. furcatum (Bale, 1884), G. insigne (Allman, 1876), G. pennatulum (Ellis and Solander, 1786), and G. roretzii (Marktanner-Turneretscher, 1890). A reexamination of the type of G. insigne proved that it is morphologically indistinguishable from G. pennatulum, the latter having priority. © 2016 Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg


Galea H.R.,Hydrozoan Research Laboratory | Ferry R.,University of the French West Indies and Guiana | Ferry R.,CEA DAM Ile-de-France
Zootaxa | Year: 2013

A new species of hydroid, Podocoryna martinicana sp. nov., is described from the Lesser Antilles. It lives symbiotically with Iridopagurus caribbensis (A. Milne-Edwards & Bouvier, 1893) (Decapoda: Paguridae) inhabiting various gastropod shells. Its colonies are highly organized and develop exclusively around the aperture of the host shell. A few large, columnar gastrozooids provided with numerous tentacles arise from a perisarc-covered stolonal mat on the inner lip of the shell, and appear to form a gate when the hermit is withdrawn, while numerous, small, highly prolific gonozooids dress a line on the edge of the outer lip. Slender, very contractile tentaculozooids occur variably among the colonies. The dispersive stage, a free-swimming medusa with four well-developed marginal tentacles and no ocelli, is solely described based on young, sexually immature specimens. The species is further characterized by the peculiar bright white tinge of the core of both hydroid and medusa tentacles. Rich illustrations, data on the nematocyst complement, as well as comparisons with related congeners are provided. Copyright © 2013 Magnolia Press.


The present report provides the first general account of the shallow-water hydroids (excluding Eudendriidae) of Martinique, French Lesser Antilles. Of a total of 92 species recorded, 10 athecates and 31 thecates are discussed here, with the remaining species having been the subject of earlier accounts. Six hydroids, namely Halecium discoidum, H. xanthellatum, Sertularella calderi, Antennella peculiaris, A. similis, and A. tubitheca, are new. Previously unreported data on the nematocyst complement of Heterocoryne caribbensis Wedler & Larson, 1986, Ectopleura mayeri Petersen, 1990, Ralpharia gorgoniae Petersen, 1990, and seven hebellid species are provided. The gonotheca and the gonophore of Hebellopsis communis Calder, 1991 are described for the first time, allowing a genus transfer to Anthohebella Boero et al., 1997. Thyroscyphus longicaulis Splettstösser, 1929, a species whose gonosome remained unknown until now, is redescribed based on new, fertile material of both sexes. The occurrence of Antennella quadriaurita Ritchie, 1909 in the Caribbean is questioned upon comparison of its cnidome with that of specimens from Tristan da Cunha, the type locality of this species. An unexpectedly wide morphological variation is noted for Aglaophenia rhynchocarpa Allman, 1877. Specimens corresponding to the Caribbean Gymnangium longicaudum (Nutting, 1900), are shown to be indistinguishable morphologically from a taxon described earlier from Brazil, Gymnangium allmani (Marktanner-Turneretscher, 1890), the latter having priority. Thorough descriptions are provided for the new, lesser known or unidentifiable species, while the common taxa are accompanied by brief remarks and/or distributional data. Illustrations are provided for each species discussed in order to justify their identification, and to facilitate identification by others. A checklist at the end of this work incorporates records of 101 species of hydroids reported from Martinique, both occurring in the present collection and cited in the literature. Copyright © 2013 Magnolia Press.


PubMed | Hydrozoan Research Laboratory
Type: | Journal: Zootaxa | Year: 2015

The present report provides the first general account of the shallow-water hydroids (excluding Eudendriidae) of Martinique, French Lesser Antilles. Of a total of 92 species recorded, 10 athecates and 31 thecates are discussed here, with the remaining species having been the subject of earlier accounts. Six hydroids, namely Halecium discoidum, H. xanthellatum, Sertularella calderi, Antennellapeculiaris, A. similis, and A. tubitheca, are new. Previously unreported data on the nematocyst complement of Heterocoryne caribbensis Wedler & Larson, 1986, Ectopleura mayeri Petersen, 1990, Ralpharia gorgoniae Petersen, 1990, and seven hebellid species are provided.The gonotheca and the gonophore of Hebellopsis communis Calder, 1991 are described for the first time, allowing a genus transfer to Anthohebella Boero et al., 1997. Thyroscyphus longicaulis Splettstbsser, 1929, a species whose gonosome remained unknown until now, is redescribed based on new, fertile material of both sexes. The occurrence of Antennella quadriaurita Ritchie, 1909 in the Caribbean is questioned upon comparison of its cnidome with that of specimens from Tristan da Cunha, the type locality of this species. An unexpectedly wide morphological variation is noted for Aglaophenia rhynchocarpa Allman, 1877. Specimens corresponding to the Caribbean Gymnangium longicaudum (Nutting, 1900), are shown to be indistinguishable morphologically from a taxon described earlier from Brazil, Gymnangium allmani (Marktanner-Turneretscher, 1890), the latter having priority. Thorough descriptions are provided for the new, lesser known or unidentifiable species, while the common taxa are accompanied by brief remarks and/or distributional data. Illustrations are provided for each species discussed in order to justify their identification, and to facilitate identification by others. A checklist at the end of this work incorporates records of 101 species of hydroids reported from Martinique, both occurring in the present collection and cited in the literature.


PubMed | Hydrozoan Research Laboratory
Type: | Journal: Zootaxa | Year: 2015

A new species of hydroid, Podocoryna martinicana sp. nov., is described from the Lesser Antilles. It lives symbiotically with Iridopagurus caribbensis (A. Milne-Edwards & Bouvier, 1893) (Decapoda: Paguridae) inhabiting various gastropod shells. Its colonies are highly organized and develop exclusively around the aperture of the host shell. A few large, columnar gastrozooids provided with numerous tentacles arise from a perisarc-covered stolonal mat on the inner lip of the shell, and appear to form a gate when the hermit is withdrawn, while numerous, small, highly prolific gonozooids dress a line on the edge of the outer lip. Slender, very contractile tentaculozooids occur variably among the colonies. The dispersive stage, a free-swimming medusa with four well-developed marginal tentacles and no ocelli, is solely described based on young, sexually immature specimens. The species is further characterized by the peculiar bright white tinge of the core of both hydroid and medusa tentacles. Rich illustrations, data on the nematocyst complement, as well as comparisons with related congeners are provided.

Loading Hydrozoan Research Laboratory collaborators
Loading Hydrozoan Research Laboratory collaborators