Search publications of the members of the Royal Belgian institute of natural Sciences
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Influence of harbour construction on mud accumulation in the Scheldt estuary
- The bottom sediments of the turbidity maximum area of the Scheldt estuary were mapped in 1999 using echo sounding, sidescan sonar and grain-size analyses of bottom sediments. Four sediment types, sand, muddy sand, sandy mud and mud were recognised. Mud, with very little sand, occurs mainly in the access channels to the sluices giving access to the harbour docks of Antwerp. The sediments of the main channel have a sandier texture. One might conclude that the total mud stock in the middle estuary has increased, both between 1964-1986 and 1986-1999, but on the contrary the mud supply from the river, the mud stock in the river channel and the mud supply to the lower estuary have all decreased. The increase in the mud stock in the area as a whole was completely at the expense of mud deposition in the access channels to the sluice gates giving access to the harbour of Antwerp. The mud stock in the river channel decreased over the years because of a decreasing mud supply from the river. The mud stock in the river channel shows variations that are directly related to fluctuations in the river load. When the suspended matter decreased during a certain year the supply of silt and clay particles decreased correspondingly and the resuspension-deposition mechanism caused a relative increase of the sand fraction in the bottom sediments in that year. Copyright © 2007 AEHMS.
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Species of Syneches from Guangdong, China (Diptera, Empidoidea, Hybotidae)
- The following three species of the genus Syneches from Guangdong, South China are described as new to science: S. nanlingensis sp. n., 5. sublatus sp. n. and S. xiaohuangshanensis sp. n. An updated key to the species of the genus from Guangdong is presented. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
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Species of Euhybus from the Oriental Region (Diptera: Empidoidea; Hybotinae)
- Two new species of Euhybus are described: Eubybus nanlingensis n. sp. and E. xui n. sp. A key to the species from the Oriental Region is given.
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Paraclius (Diptera: Dolichopodidae: Dolichopodinae) of Singapore, with new species from mangroves
- Nine species of Paraclius are reported from Singapore. The following seven Paraclius species are described as new to science: P. asiobates new species, P. crassatus, new species, P. digitatus, new species, P. obtus, new species, P. polychaetus, new species, P. serratus, new species and P. singaporensis, new species. All these new species were collected in mangrove habitats and are assigned to a new species group: the singaporensis-group. P. adligatus Becker, 1922, is recorded from Singapore for the first, time and re-described. The presence of P. abbreviatus Becker, 1922, originally described from. Singapore could not be confirmed. A key to the males of the nine Singaporean Paraclius is provided. © National University of Singapore.
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Revision of the Papua New Guinea genus Elemacoris Miller (Hemiptera: Reduviidae: Harpactorinae)
- The species of the Papua New Guinea genus Elemacoris in the reduviid subfamily Harpactorinae are revised. Two species, E. vittatus Miller, 1958 and E. doesburgi Zhao, Constant & Cai, sp. nov., are described or redescribed, illustrated, and keyed. The diagnostic characters of the genus are modified. The type specimens of the new species are preserved in the Royal Belgian Institute of Natural Sciences. Copyright © 2007 Magnolia Press.
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Etudes bioarchéologiques de la nécropole à incinération romaine de Messancy (Prov. De Luxembourg)
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De poot van de wolf aan de poort van het Steen. Een bijna vergeten museumstuk en het lot van Canis lupus in postmiddeleeuws Vlaanderen
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Osteology and relationships of Olorotitan arharensis, a hollow-crested hadrosaurid dinosaur from the latest Cretaceous of Far Eastern Russia
- the most complete dinosaur discovered in Russia and one of the best preserved lambeosaurines outside western North America. This taxon is diagnosed by following autapomorphies: large helmet−like hollow crest higher than the rest of the skull and extending caudally well beyond the level of the occiput; very high postorbital process of jugal (ratio height of postorbital process/length of jugal = 1); rostral portion of the jugal shorter than in other lambeosaurines, with a perfectly straight rostral margin; very asymmetrical maxilla in lateral view, with ventral margin distinctly downturned; very elon− gated neck composed of 18 cervical vertebrae; tibia as high as the femur; shorter cnemial crest, about one fifth of tibia length. A phylogenetic analysis, based on 118 cranial, dental, and postcranial characters, indicates that Olorotitan is a member of the Corythosaurini clade, and is the sister taxon of Corythosaurus casuarius, Hypacrosaurus stebingeri, and Hypacrosaurus altispinus. The high diversity and mosaic distribution of Maastrichtian hadrosaurid faunas in the Amur−Heilongjiang region are the result of a complex palaeogeographical history and imply that many independent hadrosaurid lineages dispersed readily between western America and eastern Asia at the end of the Cretaceous.
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Jacht in de Laatste IJstijd
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Kwaliteitshandboek volgens ISO 17025:2005
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Storm influence on the burial of objects in a shallow sandy shelf environment.
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Multimodal particle size distributions of fine-grained sediments: mathematical modeling and field investigation.
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Santonian - Campanian (upper cretaceous) inoceramids from the Houthalen mineshaft, NE Belgium
- The Santonian and Campanian inoceramids from the Houthalen mine-shaft (Limburg, NE Belgium) are described. Four successive faunas were distinguished: the Sphenoceramus pachti fauna, dated for the Middle Santonian, the Sphenoceramus patootensiformis fauna, of the upper Upper Santonian - lower Lower Campanian, the Cordiceramus paraheberti fauna, possibly of the upper Lower Campanian, and the "Inoceramus" tenuilineatus fauna, characteristic for the middle Upper Campanian. The appearance of the latter fauna marks one of the main turnover events in the evolution of the Campanian inoceramids.
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Chrysotimus Loew from China (Diptera: Dolichopodidae)
- The following 8 species are described as new to science: Chrysotimus acutatus Wang, Yang and Grootaert, sp. nov., C. chikuni Wang, Yang and Grootaert, sp. nov., C. guangdongensis Wang, Yang and Grootaert, sp. nov., C. ningxianus Wang, Yang and Grootaert, sp. nov., C. sanjiangyuanus Wang, Yang and Grootaert, sp. nov., C. songshanus Wang, Yang and Grootaert, sp. nov., C. xiaohuangshanus Wang, Yang and Grootaert, sp. nov., C. xuae Wang, Yang and Grootaert, sp. nov. A key to the Chinese species of the genus is presented. Copyright © 2005 Magnolia Press.
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Description of two new species of Chaetogonopteron with a key to species of the Sympycnus- Chaetogonopteron complex (Diptera, Dolichopodidae, Sympycninae) in China
- Two new species of Chaetogonopteron from South China are described as new to science: Chaetogonopteron anae sp. n. and C. zhangae sp. n. A key is given for the males of the 28 species known in the Sympycnus- Chaetogonopteron complex in China.
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Typhloplanoida (Platyhelminthes, Rhabdocoela) from New Caledonia and eastern Australia, with the description of six new taxa
- Thirteen species of Typhloplanoida from the Australian east coast and New Caledonia are reported, six of them new to science. Three of these new species are representatives of the Promesostomidae: Coronhelmis cuypersi new species, Coronhelmis novaecaledoniae new species, and Kymocarens kanakorum new species. Austradenopharynx reynaertsi new genus and species is a member of the Solenopharyngidae. Two species are placed within the Typhloplanidae: Kaitalugia lydieae new genus and species and K. falcata new species. Furthermore, new localities are given for Messoplana minuta, known from the Weddell Sea, Brinkmanniella palmata, occurring on the North American Pacific coast, the Swedish west coast and in the Black and Mediterranean Seas, Ceratopera axi, a cosmopolitan species, and Vauclusia conica and Pilamonila bimascula, two Australian species. For the sake of completeness, two more species of which insufficient material is available, are mentioned. A complete species list of all marine Typhloplanoida found in the region is given. © The Royal Society of New Zealand 2005.
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New species of Hybos Meigen from Guangdong Province, South China (Diptera: Empididae)
- The following three new species of the genus Hybos Meigen, from Guangdong Province, China, are described as new to science: Hybos mangshanensis, H. nankunshanensis, H. xiaohuangshanensis. Their relationships with related species are discussed. Copyright © 2005 Magnolia Press.
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Two new species of Hybos from Guangdong (Diptera: Empidoidea: Hybotinae)
- The following two species are described as new to science: Hybos curvatus sp. nov. and H. obtusatus sp. nov. An updated key to the species of the genus from Guangdong is presented.
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A new species of Clinocera Meigen (Diptera: Empididae) from China
- Clinocera guangdongensis sp. n., a new aquatic dance fly of the subfamily Clinocerinae (Diptera, Empididae) is described from China. Relationships with other described species are discussed. The species of Clinocera from China are keyed. The biogeographic distribution of the genus in China is discussed. Copyright © 2005 Magnolia Press.
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Two new species of Trichopeza Rondani (Diptera: Empididae) from South China, with a key to world species
- The following two species of the genus Trichopeza Rondani collected in Guangdong Province (South China) are described as new to science: Trichopeza sinensis new species, Trichopeza liliae new species. A key to the species of the world is presented. © National University of Singapore.
