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| Registros recuperados: 92 | |
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| Dörjes, J.; Young, J.O.. |
| The only hitherto known freshwater acoelan, Oligochoerus limnophilus, has been fully described by Ax & Dörjes (1966). It has been recorded from habitats of different European rivers: Elbe, Ilmenau, Lahn, Main, Mosel and Donau (Kothé, 1961, 1962; Kothé & Sturz, 1963; An der Lan, 1964) where it prefers to settle on artificial stone embankments and is absent from typical lenitic regions and in river parts with a high organic pollution. The species has also been recorded from irrigation canals of rice fields in the Camargue (leg. U. Graefe). Ax & Dörjes (1966) suppose that O. limnophilus emigrated during postglacial periods out of the ponto-caspian area into their new environments because all the other species of the genus have been found in the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1975 |
URL: http://www.repository.naturalis.nl/record/317230 |
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| Støp-Bowitz, C.. |
| INTRODUCTION Pendant les saisons de pêche de baleine 1946/47 et 1947/48 Dr. Vervoort, à bord du navire „Willem Barendsz", a recueilli une série d'échantillons planctoniques dans le secteur atlantique de l'Océan Antarctique. Le matériel a été recueilli principalement pour la recherche sur les Copépodes, et la pêche a été faite avec des filets à plancton à petites mailles et à larges mailles et par un large filet d'étamine („stramin-net"). 31 échantillons (entre 45 recueillis) contiennent aussi des polychètes pélagiques, que Dr. Vervoort m'a demandé d'examiner, en y ajoutant également un échantillon provenant de l'expédition du „Snellius" dans la Mer Rouge en 1929. La collection contient 15 espèces appartenantes à 10 genres et à 5 families: Polynoidae... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/319328 |
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| Horst, R.. |
| Nereis diversicolor O. F. Müll. Zooals te verwachten was, werd deze euryhaline soort, die in de Zuiderzee 1) algemeen verspreid is, ook hier in vrij grooten getale aangetroffen; er waren jeugdige exemplaren bij, met niet meer dan twaalf paren parapodia. Polydora hoplura Clap. 2) Te midden der bovengenoemde wormen vond ik het achtereinde van een Polydora, die in den dorsalen bundel der laatste 16 segmenten naast een of twee gewone, haarvormige borstels een groote, vischangelvormige borstel bezit; dit werd het eerst waargenomen door Claparède bij eene soort, levende in het kalkskelet van Balaniden in de Golf van Napels en door hem Polydora hoplura genoemd. Volgens Claparède komt deze haakborstel voor in de 15 achterste segmenten, terwijl Carazzi 3), die de... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1920 |
URL: http://www.repository.naturalis.nl/record/319287 |
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| Horst, R.. |
| 2. Nereidae 1). Nereis (Platynereis) striata (Schm.). (Mastigonereis striata Schm.). Of this species several specimens were collected in Table bay, where they were found for the first time by Schmarda 2) and afterwards met with by Willey 3). Unfortunately the description of the species is rather short and incomplete and the synonimy somewhat dubious; therefore I think it not superfluous to give a detailed account of them, especially while an epitocous male was among them. The specimens are rather small, measuring about 30 mm. in length, whereas the number of segments amounts to 70. The specimens of Schmarda and of Willey were somewhat larger, measuring 50 mm. in length, with about 80 segments. Nereis striata is characterized by a conspicuous coloration,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1918 |
URL: http://www.repository.naturalis.nl/record/318903 |
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| Horst, R.. |
| Occupied with the examination of Hesionidae from the Dutch Eastand West-Indies I found not only, that some genera of this family are described under several different names, but also, as already stated by Webster and Benedict, that the genera seem to be badly confused 1); Leocrates Kbg. f. i. is identical with Lamprophaës Gr. and Tyrrhena Clap., and Podarke pallida was ranged by Claparède among the genus Oxydromus whereas Podarke angustifrons according to Grube belongs to the genus Irma. Partly this might be ascribed to the circumstance, that sometimes not full-grown specimens were described, partly to the fact that the cephalic appendages were overlooked, either in consequence of their minute dimension or because they were fallen off. Because in the last... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1921 |
URL: http://www.repository.naturalis.nl/record/318159 |
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| Harman, W.J.. |
| CONTENTS Introduction................... 3 List of localities................. 4 Systematics................... 5 Chaetogaster.................. 5 Allonais................... 7 Slavina................... 8 Haemonais .................. 9 Stephensoniana.................. 11 Nais.................... 12 Pristina................... 13 Dero (Dero).................. 20 Dero (Aulophorus)................ 25 Conclusions................... 32 Key to the Naididae of Surinam............. 34 Literature cited.................. 35 INTRODUCTION Neotropical oligochaetes have been the object of study of several investigators over the last century, but these have resulted, for the most part, in reports of small collections or of limited geography. More exhaustive studies such... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1974 |
URL: http://www.repository.naturalis.nl/record/317843 |
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| Jamieson, B.G.M.. |
| Perionychella is reassigned to Diporochaeta as a junior synonym. 9 new species are added to the 8 previously known Queensland species of Diporochaeta, all of which are redescribed, bringing the generic total for Australia to 77 named species. Distribution of the genus is disjunct, the Queensland records being restricted to the northeast, between latitudes 15° and 19°S, with the exception of a single morphologically very isolated species in the Bunya Mountains of southeast Queensland. The remainder of the genus occurs in Tasmania, Victoria, the Australian Alps in southern New South Wales and, a few species, in New Zealand. The genus is redefined and a key to Queensland species provided. |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1976 |
URL: http://www.repository.naturalis.nl/record/317813 |
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| Horst, R.. |
| At the Stations 49a and 260 the Siboga-Expedition collected two specimens of Aphroditidae, that, though agreeing in their main characters with Hermione and Laetmonice, in my opinion cannot be ranged in these genera on account of the quite different shape of their dorsal bristles; therefore the new genus Halogenia may be proposed for them. Halogenia arenifera n. sp. Siboga-expedition, Stat. 49a, Sapeh-strait, depth of 69 M. The body of the unique specimen is ellipsoidal, long 12 mm., broad 7 mm.; the number of its segments is about 30. Its ventral side is rough, densely beset with small tubercles, whereas the dorsum is entirely covered with sand-grains, that are adhering to the elytra. No dorsal felt could be detected. The parapodia are slender, conical,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1916 |
URL: http://www.repository.naturalis.nl/record/317994 |
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| Horst, R.. |
| Our knowledge of the Aphroditidae from the Malay-Archipelago hitherto was very scanty and considering the great variety of those worms in neighboring seas — Grube from the Philippines 1) mentioned 27 and Potts from the Indian Ocean 31 species 2) — it could be expected that a thorough examination of this region, as done by the Siboga-expedition, should reveal us many new and interesting form; in these expectations we are not disappointed. Two remarkable species viz. Lepidasthenia sibogae and Eulepis malayana, besides three species of Psammolyce are already mentioned before 3); in the present paper we wish to confine ourselves to the subfamily of the Polynoïnae. Only six representatives of this group hitherto are mentioned from Amboina, Borneo, Ceram and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.76. |
| Ano: 1915 |
URL: http://www.repository.naturalis.nl/record/318645 |
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| Registros recuperados: 92 | |
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