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Registros recuperados: 93
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Preliminary biological characterization of the Saldanha hydrothermal field at the Mid-Atlantic Ridge (36 degrees 34 ' N, 32 degrees 26 ' W, 2200 m) ArchiMer
Biscoito, M; Almeida, A; Segonzac, Michel.
A preliminary description of the biology of the Saldanha hydrothermal field in the Mid-Atlantic Ridge (36 degrees 34'N, 32 degrees 26'W, 2200 m) is given, based on direct observation, video images and samples. Venting occurs mainly in a diffuse way through sediment, but hydrothermal fluid discharges are visible through centimeter-long orifices, scattered on the sediment, over an area of approximately 400 m(2), at depths between 2,200 and 2,220 metres. Emitted fluids are transparent, with a temperature of 7-9 degrees C. An almost complete absence of macro- and megafauna around the venting orifices was found. The only vent invertebrate identified was the gastropod Phymorhynchus sp., with only two juvenile specimens caught. A careful examination of the images...
Tipo: Text Palavras-chave: New records; Antimora; Acanthonus; Fish; Sponge; Bathyal megafauna; Gastropoda; Fauna assemblage; Mid Atlantic Ridge; Hydrothermal vents.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-3610.pdf
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Pteropods (Mollusca, Euthecosomata) from the Early Eocene of Rotterdam (The Netherlands) Naturalis
Janssen, A.W..
A borehole was drilled at Rotterdam in 1955 as a demonstration during the E55 exhibition. Holoplanktonic molluscs (pteropods) were found to be present in the interval 504.5-655.0 m below rotary table (= RT). The upper sample of Middle Eocene (Lutetian) age yielded just a few unidentifiable limacinids. The section between 507.5-607.0 m, of Early Eocene (Ypresian) age, yielded poorly preserved pteropods and demonstrated that the complete interval belongs to pteropod zone 9. Apart from the most abundant species, Camptoceratops priscus, which is the index taxon of pteropod zone 9, the section yielded Heliconoides mercinensis and Limacina taylori, which are known to accompany the index species. Two further limacinid species are described as new to science, viz....
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Thecosomata; Pteropods; The Netherlands; Eocene; Ypresian; Biostratigraphy; 38.22.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/361978
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Redefinition of Thapsia Albers, 1860, and description of three more helicarionoid genera from western Africa (Gastropoda, Stylommatophora) Naturalis
Winter, A.J. de.
As presently used, the helicarionoid genus Thapsia Albers, 1860 embraces a large, heterogeneous assemblage of species. As a first step in the revision of this group of taxa, the genus Thapsia (type species Helix troglodytes Morelet, 1848) is redefined anatomically and conchologically. In the absence of alcohol-preserved material of T. troglodytes, Thapsia ebimimbangana spec. nov. from Cameroon and T. wieringai spec. nov. from Gabon are described to characterize the soft parts morphology of Thapsia. Three new genera are introduced, viz. Saphtia gen. nov. (type species S. granulosa spec. nov.), Pseudosaphtia gen. nov. (type species P. brunnea spec. nov.) and Vanmolia gen. nov. (type species Thapsia sjoestedti d’Ailly, 1896). A second species of Saphtia, S....
Tipo: Article / Letter to the editor Palavras-chave: Cameroon; Côte d'Ivoire; Gabon; Africa; Gastropoda; Taxonomy; Land snails; Helicarionoidea; Thapsia; Saphtia; Pseudosaphtia; Vanmolia; Urocyclidae; 42.73.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/273964
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Remarks on the genus Chloritis in Sulawesi, Indonesia, with the descriptions of two new species Naturalis
Maassen, W.J.M..
Two new species of the genus Chloritis of the camaenid family are described from Sulawesi, Indonesia, viz. Chloritis vanbruggeni and C. togianensis. Three hitherto unfigured species (C. biomphala, C. balatensis and C. talabensis) are illustrated.
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Pulmonata; Camaenidae; Chloritis; Taxonomy; South-east Asia; Indonesia; Sulawesi; 42.73.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/311937
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Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 10. Mollusca, Gastropoda, Naticidae Naturalis
Kabat, A.R..
The 1990 Rumphius Biohistorical Expedition to Ambon (Indonesia) made 44 collecting stations. Twenty-seven species representing 11 genera of the Naticidae (Gastropoda: Caenogastropoda) were collected at 29 stations. This paper provides keys to the genera and species, along with diagnoses and short synonymies of the species. The modern identity of the thirteen naticid species known to Rumphius in his “D’Amboinsche Rariteitkamer” (1705) is determined. Fifty described species of Naticidae are currently known from Malaysia and Indonesia, with 38 known from Ambon itself (this expedition and older museum collections).
Tipo: Article / Letter to the editor Palavras-chave: Ambon; Gastropoda; Indonesia; Naticidae; Rumphius; 42.73.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/216182
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Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 11. Doridacea of the families Chromodorididae and Hexabranchidae (Mollusca, Gastropoda, Opisthobranchia,Nudibranchia), including additional Moluccan material Naturalis
Yonow, N..
Twenty-one species belonging to the family Chromodorididae and one species of Hexabranchus (Hexabranchidae) are present in the 1990 Rumphius Biohistorical Expedition (RBE) collection. The 1996 Fauna Malesiana Marine Maluku Expedition (Mal) collected 43 lots of nudibranchs, mostly chromodorids: 17 species were identified, six of which were not represented in the RBE collection. A total of 35 chromodorid species, belonging to nine genera, are described from Ambon and nearby localities. Four species are new to science, and seventeen species are recorded from Indonesian waters for the first time. Brief descriptions are given for the species which are well known, highlighting significant features, differentiating characters from similar species, and allowing...
Tipo: Article / Letter to the editor Palavras-chave: Indonesia; Ambon; Chromodorididae; Hexabranchidae; Nudibranchia; Opisthobranchia; Gastropoda; Systematics; Taxonomy; 42.73.
Ano: 2001 URL: http://www.repository.naturalis.nl/record/217432
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Results of the Rumphius Biohistorical Expedition to Ambon (1990) : Part 2. An unusual triphorid (Mollusca: Gastropoda) from the Moluccas, Indonesia Naturalis
Marshall, B.A..
Costatophora is introduced as a new subgenus of Tetraphora Laseron, 1958 for Triforis seranus P.J. Fischer, 1927, a triphorid with distinctive teleoconch sculpture and radular morphology.
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Triphoridae; New subgenus; Ambon; Indonesia; 42.01; 42.73.
Ano: 1994 URL: http://www.repository.naturalis.nl/record/318013
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Results of the Rumphius Biohistorical Expedition to Ambon (1990) : Part 5. Mollusca, Gastropoda, Muricidae Naturalis
Houart, R..
This report deals with the species of Muricidae collected during the Rumphius Biohistorical Expedition on Ambon. At 44 stations, a total of 58 species in 23 genera of the prosobranch gastropod family Muricidae were obtained. The identity and the classification of several nominal taxa is revised. Four species are new to science and are described here: Pygmaepterys cracentis spec. nov. (Muricopsinae), Pascula ambonensis spec. nov. (Ergalataxinae), Thais hadrolineae spec. nov. and Morula rumphiusi spec. nov. (Rapaninae). Some comments are included on the Muricidae described by Rumphius and on their identification. In his "Amboinsche Rariteitkamer" (1705) 21 species of muricids were included, of which 16 were illustrated by Rumphius or Schijnvoet. The identity...
Tipo: Article / Letter to the editor Palavras-chave: Rumphius expedition; Indonesia; Ambon; Mollusca; Gastropoda; Muricidae; 42.01; 42.73.
Ano: 1996 URL: http://www.repository.naturalis.nl/record/318484
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Results of the Rumphius Biohistorical Expedition to Ambon. Part 9. The Nassariidae (Mollusca: Gastropoda) Naturalis
Kool, H.H.; Strack, H.L..
This paper lists all species of the family Nassariidae collected during the Rumphius Biohistorical Expedition to Ambon (1990). Altogether 47 species are reported, of which two, Nassarius maccauslandi and N. rotundus, are new for Indonesia. Four additional species from Ambon are known from collections in the Nationaal Natuurhistorisch Museum, Leiden and in the Zoological Museum, Amsterdam. Another additional species is mentioned by Adam & Leloup (1938). Five species of Nassariidae were described by Rumphius, of which four were found by the Rumphius Biohistorical Expedition.
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Nassariidae; Ambon; Moluccas; Indonesia; Distribution; Taxonomy; Rumphius; 42.73.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/215262
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Revisionary notes on Negulus O. Boettger, 1889, a genus of minute African land snails (Gastropoda Pulmonata: Vertiginidae) Naturalis
Bruggen, A.C. van.
The genus Negulus is reviewed; only four Recent species, restricted to continental Africa, are recognized. The genus is extinct in Europe, being only recorded from Tertiary deposits. A key to the shells of the Recent species (all figured) is supplied. The anatomy is as yet unknown. A sinistral shell of N. abyssinicus is described from among a series of paralectotypes in the Leiden Museum, the first such abnormality in the genus (figured). A fair amount of shell material has become available (among which some historical specimens) so that metric data may be compared with greater confidence. Recent occurrence is established/confirmed for Eritrea, Ethiopia, Sudan, Kenya, Tanzania, Zaire, Zambia, Malaŵi, and Bioko (Fernando Poo). The small size of the shell...
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pulmonata; Vertiginidae; Negulus; Africa; St. Helena Is.; Taxonomy; 42.73.
Ano: 1994 URL: http://www.repository.naturalis.nl/record/318176
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Sexual selection maintains whole-body chiral dimorphism in snails Naturalis
Schilthuizen, M.; Craze, P.G.; Cabanban, A.S.; Davison, A.; Stone, J.; Gittenberger, E.; Scott, B.J..
Tipo: Article / Letter to the editor Palavras-chave: Amphidromus; Balanced polymorphism; Chirality; Gastropoda; Malaysia; 42.73.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/226754
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Southeast Asia as the birthplace of unusual traits: the Melongenidae (Gastropoda) of northwest Borneo Naturalis
Vermeij, G.J.; Raven, H..
In this paper the Miocene to recent melongenid species of northwest Borneo are discussed. The recent fauna is poor with three genera represented by one species each. In the Miocene three (possibly four) genera occur with eight (possibly nine) species of which three are described as new species: Melongena murifactor, uniquely characterized by the formation of a septum walling off the adapical sector of the aperture; Pugilina erecta, characterized (along with its close Miocene relative from Java, P. ickei) by a free-edged, erect inner lip; Volema goliath, large for the genus with later whorls progressively covering the upper row of spines of earlier whorls. The apertural septum of M. murifactor is unique within Gastropoda, whereas the erect inner lip of P....
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Melongenidae; Mollusca; Molluscs; 38.22; 42.73.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/320196
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Spatio-temporal differentiation in the population structure of Hydrobia ulvae on an intertidal mudflat (Marennes-Oleron Bay, France) ArchiMer
Haubois, Anne-gaelle; Guarini, Jean-marc; Richard, Pierre; Blanchard, Gerard; Sauriau, Pierre-guy.
Spatio-temporal changes in density, breeding cycle, growth and population structure of Hydrobia ulvae (Gastropoda: Prosobranchia) were studied by monthly sampling of a wide bare mudflat in Marennes-Oleron Bay. Four stations, located along a cross-shore transect and characterized by different geomorphological structures, were investigated from March 2000 to February 2001. Hydrobia ulvae was mainly distributed in the upper half part of the mudflat and no individuals were found in the lower part. The breeding cycle extended from March to December and showed two annual peaks, in spring and in autumn. Three cohorts were recruited during the year and showed high growth rates during summer; the parameters of the von Bertalanffy model describing the growth curves...
Tipo: Text Palavras-chave: Gastropoda; Mudflat; Spatio temporal change; Population dynamic.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-598.pdf
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Strategie de repeuplement du mollusque gasteropode Concholepas concholepas (B) au sud du Chili ArchiMer
Varelasantibanez, C.
The reproducers are kept in the laboratory throughout the year and the egg-carrying capsules can be stimulated during this entire period. The capsules are then transferred to the natural environment where hatching takes place. Moreover, juveniles taken in the natural environment can be farmed in suspended systems, at sea, where their growth is faster than in a controlled environment.
Tipo: Text Palavras-chave: Chile; Concholepas concholepas; Gastropoda; Marine molluscs; Nutrition; Raft culture; Juveniles; Hatcheries; Growth; Laboratory culture; Sexual reproduction; Aquaculture; Rearing.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-927.pdf
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Streptaxidae (Mollusca: Gastropoda: Pulmonata) of the Seychelles Islands, Western Indian Ocean Naturalis
Gerlach, J.; Bruggen, A.C. van.
The taxonomy of the species of the terrestrial carnivorous snail family Streptaxidae of the Seychelles archipelago is reviewed with the exception of the three species of the genus Priodiscus (vide Gerlach, 1995). All 18 species are restricted to the northern, granitic islands. This paper describes 15 species, including two new genera (Silhouettia and Careoradula), and four new subspecies (Edentulina dussumieri reservae, E. d. silhouettae, E. d. praslina, Stereostele nevilli parvidentata). The nominal taxon Streptaxis (Imperturbatia) constans var. silhouettae is raised to species level to become the type species of the new genus Silhouettia. The type species of Careoradula is Streptaxis (Imperturbatia) perelegans. Anatomical descriptions and figures are...
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Pulmonata; Streptaxidae; Seychelles Islands; Taxonomy; Biogeography; 42.73.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/219431
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Studies on the Streptaxidae (Mollusca: Gastropoda Pulmonata) of Malaw^ i 5. Description of Gulella meredithae spec. nov. Naturalis
Bruggen, A.C. van.
Gulella meredithae spec. nov. is described from the uplands of central and northern Malawi. It belongs to what has been termed the G. browni-group (better called the G. radius-group), an assemblage of Central and East African taxa with small shells with a noticeably acute apex, with more or less smooth nepionic whorls and with marked costulation on the remaining whorls. Attention is drawn to the striking juvenile apertural dentition.
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pulmonata; Streptaxidae; Gulella; Africa; Malawi; Juvenile dentition; Taxonomy; 42.73.
Ano: 2000 URL: http://www.repository.naturalis.nl/record/216030
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Studies on the Streptaxidae (Mollusca: Gastropoda Pulmonata) of Malawi 12 Four new species of Gulella s.l. Naturalis
Bruggen, A.C. van.
Gulella annibiodiversitatis spec. nov. is described from a few scattered localities in montane forest above c. 1300 m in southern-central Malaŵi. It is mainly characterized by a smallish (4.9-6.3 mm high), smooth and generally featureless shell without apertural dentition. Gulella menkhorsti spec. nov., has a small (2.3-2.9 mm high) and smooth shell with a six-fold dentition and is probably a restricted range endemic; so far it has only been recorded from the Mpita Forest in southern Malaŵi. A single smooth and small shell (2.7 mm) with a seven-fold apertural dentition from the Misuku Hills in northern Malaŵi also does represent a new species, Gulella crux spec. nov. Another sample from the same area, introduced as Gulella nuchalis spec. nov., has a...
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pulmonata; Streptaxidae; Gulella; Malawi; East Africa; Taxonomy.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/638094
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Studies on the Streptaxidae (Mollusca, Gastropoda Pulmonata) of Malawi 8. A revision of ‘Marconia’ hamiltoni (Smith), the largest local Naturalis
Bruggen, A.C. van; Winter, A.J. de.
‘Marconia’ hamiltoni s.l. is known from two discrete mountainous areas in Malawi, i.e. the (southern) Mt. Mulanje complex, and the (more northern) Zomba Plateau s.l. These uplands are separated by about 65 km of lower lying land with different types of vegetation and climate. Material from these two regions may be distinguished as separate species, the southern populations having comparatively small and broad shells with some apertural dentition (‘M’. hamiltoni, lectotype designated), while the northern populations have noticeably larger and more slender shells with a more reduced apertural dentition (‘M’. malavensis). Discussion of the type localities for both taxa shows that these are either localized in an unlikely place (‘M’. hamiltoni) or unclear...
Tipo: Article / Letter to the editor Palavras-chave: Mollusca; Gastropoda; Pulmonata; Streptaxidae; Marconia; Austromarconia gen. nov.; Taxonomy; Nomenclature; Central Africa; Malawi.; 42.73.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/220294
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Studies on the Streptaxidae (Mollusca: Gastropoda Pulmonata) of Malawi9. Description of Gulella streptostelopsis, a new Streptostele-like species of Gulella. Naturalis
Bruggen, A.C. van.
Gulella streptostelopsis spec. nov. is described from a series of localities of mainly between 1000 and 1500 m a.s.l. in Malawi south of about 11°S. The minute, almost smooth, shell (length 2.0-2.4 mm) resembles that of the genus Streptostele (hence the name), but is characterized by three-fold apertural dentition and just under six whorls. This taxon may represent a new genus; pending studies on the anatomy no new generic name is proposed.
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pulmonata; Streptaxidae; Gulella; Streptostele; Taxonomy; Malawi; East Africa; 42.73.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/226596
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Studies on the Streptaxidae (Mollusca: Gastropoda Pulmonata) of Malaŵi 10. Description of Gulella systemanaturae, a new species from Dedza Mountain Naturalis
Bruggen, A.C. van.
Gulella systemanaturae spec. nov. is described from Dedza Mt. in South-Central Malaŵi. The mediumsized shell is characterized by little prominent costulation and a four-fold apertural dentition consisting of angular lamella, labral process, and outer and inner columellar processes. The labrum is sharply angulate at its point of attachment to the body whorl near the angular lamella.
Tipo: Article / Letter to the editor Palavras-chave: Gastropoda; Pulmonata; Streptaxidae; Gulella; Taxonomy; Malaŵi; 42.73.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/261759
Registros recuperados: 93
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