|
|
|
| Registros recuperados: 14 | |
|
|
| Platvoet, Dirk; Scheepmaker, Maarten; Pinkster, Sjouk. |
| During two and a half decades periodic survey programs have been carried out to follow the dispersal of Gammarus tigrinus. Since the last survey in the period 1985-1986 the species consolidated its position and showed a minor range extension in the southeastern part of the country. Gammarus specimens from the island Terschelling were electrophoretically investigated and compared with known G.tigrinus and G.zaddachi from the mainland. These experiments demonstrated the presence of G.tigrinus on this island. Crangonyx pseudogracilis which showed some range extension in the 1985-1986-survey, again was found outside its hitherto known distribution area. |
| Tipo: Article / Letter to the editor |
|
| Ano: 1989 |
URL: http://www.repository.naturalis.nl/record/505504 |
| |
|
|
| Platvoet, Dirk. |
| Bogidiella neotropica was described by Ruffo in 1952 after a single specimen of unknown sex, from Amazonia (Brazil). Both sexes have been found recently in the Guarico district, Venezuela. From the absence of secondary sexual differences in the male appendages it is clear that the species belongs to the subgenus Bogidiella s. str. The Venezuelan specimens are redescribed and illustrated. |
| Tipo: Article / Letter to the editor |
|
| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/504197 |
| |
|
| |
|
| |
|
|
| Pinkster, Sjouk; Platvoet, Dirk. |
| Like in many previous years, the distribution pattern of G. tigrinus was followed. G. tigrinus proves to have recovered from its decline after the severe winter of 1978/1979. Likewise the distribution of C. pseudogracilis was checked, three year after its first discovery in the Netherlands. Some minor range extensions were found. In a monthly sampling program and in laboratory experiments information was collected on the biology so far unknown for this species. Its possible future interaction with local amphipod species is discussed. |
| Tipo: Article / Letter to the editor |
|
| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/505403 |
| |
|
| |
|
|
| Platvoet, Dirk. |
| Samples from wells in the coastal region of the département Var (France), from Mallorca and from a cave in Formentera (Balearic islands) contained among other amphipods species belonging to the genus Salentinella Ruffo; the status of the specimens from Var and from Mallorca is discussed. Salentinella formenterae n. sp. is described from Formentera and some remarks on the discriminating features used within the genus are given. |
| Tipo: Article / Letter to the editor |
|
| Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/503919 |
| |
|
|
| Pinkster, Sjouk; Dieleman, Jan; Platvoet, Dirk. |
| Since its first discovery in the Netherlands in 1964, Gammarus tigrinus has rapidly spread over inland waters in the western and north-eastern parts of the Netherlands. It appeared that at the end of 1976, G. tigrinus had replaced the local Gammarus species in most of the newly invaded waters. Surveys carried out in 1978 and 1979 showed a different and rather confusing pattern i.e that G. tigrinus is still extending its range in the delta region of the Netherlands and in the province of Zuid-Holland but that its spreading has come to a stand still in the rest of the country. It has even disappeared from a great number of formerly inhabited waters. In some of these waters indigenous species like G. d. duebeni and G. p. pulex reappeared after an absence of... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1980 |
URL: http://www.repository.naturalis.nl/record/505333 |
| |
|
| |
|
|
| Sanz, Sebastián; Platvoet, Dirk. |
| On several occasions, shrimps belonging to a new species of the genus Typhlatya were collected in a cave in the province of Castellón, Spain. This is the first record of the genus in the Iberian Peninsula. The species is described and the validity, distribution, and zoogeography of the genus, as well as the status of the genus Spelaeocaris, are discussed. Former models for the evolution of the genus Typhlatya and its genus group are reviewed, as well as the system of inner classification of the Atyidae and its biogeographical meaning. For the age and evolution of the genus we developed a new model based on vicariance principles that involves further evolution of each species after the disruption of the ancestral range. This allows new estimations for the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Typhlatya; Decapoda; Spain; Subterranean waters; Systematics; Zoogeography; Vicariance; Evolution; Key to genus. |
| Ano: 1995 |
URL: http://www.repository.naturalis.nl/record/503881 |
| |
|
| |
| Registros recuperados: 14 | |
|
|
|
