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	Provedor de dados Naturalis (37) Autor Hartog, C. den (37) Plas, F. van der (2) Adema, F. (1) Berge Henegouwen, A.L. van (1) Ham, R.W.J.M. van der (1) Kasteel, J. van (1) Ploeg, D.T.E. van der (1) Polderman, P.J.G. (1) Segal, S. (1) Sipkes, C. (1) Swennen, C. (1) Weeda, E.J. (1) Wiegleb, G. (1) Mais... Tipo do documento Article / Letter to the editor (37) Ano 2002 (1) 1994 (1) 1980 (1) 1973 (3) 1972 (3) 1971 (1) 1970 (4) 1968 (3) 1967 (4) 1965 (2) 1964 (2) 1963 (2) 1962 (1) 1959 (3) 1958 (1) 1956 (1) 1955 (2) 1953 (1) 1952 (1) Mais... País Netherlands (37)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 37 Primeira ... 1 2 ... Última A synopsis of the Lemnaceae Naturalis Hartog, C. den; Plas, F. van der. The family Lemnaceae is divided into 2 subfamilies, Lemnoideae with the genera Spirodela and Lemna — the latter with 2 subgenera, Lemna and Staurogeton — and Wolffioideae with the genera Wolffia, Wolffiopsis, Wolffiella, and Pseudowolffia, the last two being new and based on former infrageneric taxa. All these taxa are described, and their types indicated; keys are provided for their distinction. Recognized species names are listed with their synonyms, a few being newly reduced. There are 5 new specific combinations. A list of invalid and dubious names is added. The excluded names are listed separately. An explanatory glossary is given of the terminology used in the descriptions, and is illustrated by some diagrams (fig. 1). Tipo: Article / Letter to the editor Ano: 1970 URL: http://www.repository.naturalis.nl/record/524867 Range extension of Halophila stipulacea (Hydrocharitaceae) in the Mediterranean Naturalis Hartog, C. den. Halophila stipulacea (Forsk.) Aschers. is a sea-grass which is widely distributed along the coasts of the western Indian Ocean and the Red Sea. In 1895 Fritsch (Verh. Zool. Bot. Ges. Wien 45, 1895, p. 104) recorded the species from the Island of Rhodos in the Aegean Sea. This was the first record of the species from the Mediterranean. There can be no doubt that it penetrated the Mediterranean via the Suez Canal, which was completed in 1869. Although there are no early records of its occurrence in the Suez Canal, it is significant that it was the only sea-grass found during the exploration of the canal by Munro Fox in the autumn of 1924; at that time it was abundant in several localities in the canal. Forti’s record (Nuov. Giorn. Bot. Ital. 34, 1927, p.... Tipo: Article / Letter to the editor Ano: 1972 URL: http://www.repository.naturalis.nl/record/525017 Potamogetonaceae, Zosteraceae, and Cymodoceaceae Naturalis Hartog, C. den; Wiegleb, G.. The three families of sea-grasses are treated together here, with a general introduction by Den Hartog and a key to the sea-grass genera. An extensive chapter on phytochemistry by R. Hegnauer (Leiden) has been included. Potamogetonaceae, pp. 174—196. The family comprises 3 genera and c. 80 species all over the world, of which in Malesia: Potamogeton (13 species) and Ruppia (1). The general part of the treatment covers c. 5 pages and includes a paragraph on pollen morphology by R.W.J.M. van der Ham (Leiden). Family, genera, and species are described and annotated. There are keys to the genera and species. Zosteraceae, pp. 197-200. The family consists of 3 genera and 17 species, of which only one genus (Zostera) with one species in Malesia. The general part... Tipo: Article / Letter to the editor Ano: 2002 URL: http://www.repository.naturalis.nl/record/532593 Bipalium engeli n. sp., a terrestrial triclad from Singapore Naturalis Hartog, C. den. A new species of the genus Bipalium, B. engeli, is described from secondary forest in Singapore. It is allied to B. rauchi von Graff, 1899, from the same area, but differs markedly in its colour pattern. Tipo: Article / Letter to the editor Ano: 1968 URL: http://www.repository.naturalis.nl/record/504838 Ondinea, a new genus of Nymphaeaceae Naturalis Hartog, C. den. Among water-plant material received on loan from the Western Australian Herbarium, South Perth, there was a very remarkable Nymphaeacea which did not fit in any of the 8 genera so far described in this family. Mr. R. C. Royce, the curator of the herbarium mentioned above, kindly gave his permission for me to work out this material. Fortimately, additional specimens of this taxon were received on loan from C.S.I.R.O., Canberra, through the kind collaboration of Miss Dr. N. T. Burbidge. Dr. R. C. Bakhuizen van den Brink, Leiden, rendered the diagnosis into Latin. Miss R. van Crevel prepared the drawing. Mr. J. Muller studied the pollen of the plant; his findings are given in an appendix to this paper. Tipo: Article / Letter to the editor Ano: 1970 URL: http://www.repository.naturalis.nl/record/526252 Immigration, dissemination and ecology of Elminius modestus Darwin in the North Sea, especially along the Dutch Coast Naturalis Hartog, C. den. In 1947, Bishop was the first to pay attention to the occurrence of the barnacle Elminius modestus Darwin in British waters. This barnacle, which is a native of the coasts of southern and eastern Australia and New Zealand, i.e. of the temperate seas of the southern hemisphere, had been found by him in great quantities on test-panels in Chichester Harbour in July 1945. Soon after, several other records were published. Crisp and Chipperfield (1948) mentioned a number of localities; Elminius modestus appeared to be already widely distributed along the British coast (see fig. 1). Stubbings (1950) had the disposal of data of 1944 and from the size of the collected specimens he concluded, that Elminius must have occurred in Portsmouth as early as 1943. According... Tipo: Article / Letter to the editor Ano: 1953 URL: http://www.repository.naturalis.nl/record/504998 Fycologische Notities, 1, Sphacelaria plumigera in Zeeland Naturalis Hartog, C. den. Sphacelaria plumigera Holmes is reported from 8 localities in the province of Zeeland (Netherlands). The differences between this species and S. plumosa Lyngb., with which it has been confounded, are given, and its habitat is described. The species occurs in the upper part of the sublittoral and the lowest part of the eulittoral, and is uncovered only during the spring ebb. It shows a preference for sheltered localities and has been found in the following algal communities: Polysiphonieto-Chaetomorphetum, Codieto-Hypoglossetum, and in the vegetation of Laminaria saccharina. The species is limited to the euhalinicum and does not occur in the brackish waters of the estuaries. Unilocular sporangia have been found in February, March and April. Finally the... Tipo: Article / Letter to the editor Ano: 1962 URL: http://www.repository.naturalis.nl/record/527090 Speculations on the Immigration of the Barnacle Elminius modestus in France Naturalis Hartog, C. den. The literature on the recent immigration of the Australian barnacle Elminius modestus to West European coasts is rather exhaustive. The present author has given details on the exact centre of immigration on the Dutch coast. The spreading from this centre has been followed in subsequent years (DEN HARTOG, 1953). From the French coast only few data are known. The localities where it first established itself are unknown. Speculative though it may be, therefore, it seems useful to try a reconstruction of the immigration of Elminius in France as exact data are still available. In July 1951 the author found Elminius on the Boulonnais coast (Pas de Calais: Le Portel, Boulogne sur Mer, Wimereux, Ambleteuse, Audreselles, Cap Gris Nez). On account of our findings on... Tipo: Article / Letter to the editor Ano: 1956 URL: http://www.repository.naturalis.nl/record/504982 Brackish water as an environment for Algae Naturalis Hartog, C. den. The term ‘brackish water’ is used in several senses and, therefore, I want at first to explain what I consider to be brackish water and what not. Redeke (1933) defined brackish water as a mixture of fresh water and sea water sensu stricto. This definition excludes the continental salt waters which have a different origin. There exist, however, salt waters which have lost long ago their contact with the sea and have now a chemical composition completely aberrant from sea water, due to the joint effect of continual inflow of new electrolytes with river water, evaporation, and precipitation. As examples the Caspian and the Aral Sea may be mentioned. Other investigators prefer to include on grounds of hydrological and hydrochemical similarities also the... Tipo: Article / Letter to the editor Ano: 1967 URL: http://www.repository.naturalis.nl/record/524784 Enige waterplantengemeenschappen in Zeeland Naturalis Hartog, C. den. The paucity of the waterplant flora of the province of Zeeland is ascribed to the difficult access by fresh-water species. The islands are surrounded by sea water, and the inland waters are for the larger part more or less brackish. Fresh water occurs only in a narrow sandy strip along the inner side of the dune ridge and in a few small enclaves elsewhere in the area. Moreover, in this limited area fresh water is only found in small drinking pits and small ditches, the larger waters being without exception brackish. The 20 phanerogams found (Table 1) are grouped in 6 different vegetation-units. 1. The Lemno-Spirodeletum is only fragmentarily represented. 2. The Lemnetum trisulcae, a community of small, free floating hydrophytes, is only present in Zeeland... Tipo: Article / Letter to the editor Ano: 1963 URL: http://www.repository.naturalis.nl/record/527569 Notities over Nederlandse Alismataceae Naturalis Hartog, C. den. Er bestaat op het ogenblik de neiging de kleine waterweegbree Baldellia ranunculoides (L.) Parl. te noemen in plaats van Echinodorus ranunculoides (L.) Engelm. In de nieuwste druk van de flora van Heukels-van Ooststroom werd deze naam in de Nederlandse literatuur geïntroduceerd. In mijn Alismataoeae-bewerking voor de Flora Malesiana (1957) heb ik de naam reeds afgewezen, doch een nadere argumentatie zal de Nederlandse floristen stellig interesseren. In 1854 heeft Parlatore Schinodorus ranunculoides als het type van een nieuw monotypisch genus Baldellia aangevoerd, doch hij werd niet nagevolgd. Volgens Pichon (1946) is er evenwel alle reden voor om dit wel te doen, want hij meende niet minder dan 4 kenmerken gevonden te hebben, waarin E. ranunculoides van... Tipo: Article / Letter to the editor Ano: 1959 URL: http://www.repository.naturalis.nl/record/534160 Over de oecologie van bloeiende Lemna trisulca Naturalis Hartog, C. den. Flowering Lemna trisulca has been found in three localities in the province of Zeeland. The vegetative plants are completely submerged and do not show any adaptation to aerial life (ricciellids). The fertile plants rise to and drift on the surface, as their fronds contain intracellular air spaces, and stomata are developed (lemnids). The inflorescences are proterandrous. Pollination takes place by direct contact of the stiff curved stamens of the one plant with the short style of an other plant. Contacts are easily made, as wind, water currents and moving animals continually shift the position of the fronds, which usually are densely packed. The species has its optimum in relatively small waters, where it is sheltered from wind- and waveaction, and where... Tipo: Article / Letter to the editor Ano: 1964 URL: http://www.repository.naturalis.nl/record/527531 Some notes on the distribution of Plasmodiophora diplantherae, a parasitic fungus on species of Halodule Naturalis Hartog, C. den. Plasmodiophora diplantherae (F. & W.) Iv. Cook is a specific parasite on species of the sea-grass genus Halodule. It had been recorded only from its type locality in the West Indies, but from a recent study of extensive herbarium material it has proved to be a widely distributed pantropic species. Tipo: Article / Letter to the editor Ano: 1965 URL: http://www.repository.naturalis.nl/record/531896 Korte mededelingen Naturalis Adema, F.; Ham, R.W.J.M. van der; Hartog, C. den; Ploeg, D.T.E. van der; Weeda, E.J.. Een nieuwe desinfectiemethode voor herbaria. Droog organisch materiaal oefent een grote aantrekkingskracht uit op allerlei dierlijke organismen. Gedroogde planten, het herbarium, maken daarop geen uitzondering en worden met graagte door verschillende insektesoorten gegeten. Vooral de z.g. museumkevers worden nogal eens in collecties aangetroffen. Iedereen, die er een herbarium op na houdt, weet, dat regelmatige controle en desinfectie van zijn collectie noodzakelijk zijn. Het controleren van vele, soms duizenden of tienduizenden, exemplaren is een tijdrovend, zij het niet altijd onplezierig karweitje. Het desinfecteren van een collectie kan echter wel onplezierig zijn. Om een herbarium insektenvrij te houden, wordt tot nu toe gewerkt met bepaalde... Tipo: Article / Letter to the editor Ano: 1980 URL: http://www.repository.naturalis.nl/record/528088 Die Seepocke Elminius modestus auf Helgoland Naturalis Hartog, C. den. Im Jahre 1953 setzten Crisp & Southward auseinander, dass hinsichtlich Arten aus dem Gezeitengebiet, Seestrassen bisweilen eine unüberwindliche Sperre bilden. Crisp & Southward erläuterten diese Annahme u.a. mit den Beispielen der Seepocke Balanus perforatum Bruguière und der Napfschnecke Patella intermedia Jeffreys, Arten welche an der englischen Südküste vorkommen, jedoch in Irland fehlen und von welchen angenommen werden kann, dass es sich hier nicht um rezente Einwanderer handelt. Die Seepocke Elminius modestus Darwin, die sich während des Krieges in England ansiedelte (Bishop, 1947) und sich dort schnell verbreitete, ist ein interessantes Objekt um diese Annahme zu prüfen. Die südliche Nordsee sowohl wie der Kanal zeigten sich als Sperre nicht... Tipo: Article / Letter to the editor Ano: 1959 URL: http://www.repository.naturalis.nl/record/505007 The littoral environment of rocky shores as a border between the sea and the land and between the sea and the fresh water Naturalis Hartog, C. den. Many ecologists have occupied themselves with the problem of the littoral zonation and they still disagree among themselves about the delimitation of the zones and the factors which cause the zonation. In this paper the problem has been approached in two different ways. In the first place the littoral zone sensu lato has been regarded as the border area between the sea and the land. This approach does not result in an explanation of the ‘submergence’ of many eulittoral organisms in the Arctic waters and the Baltic. Secondly the littoral zone sensu lato has been considered as the border zone between the sea and the fresh water, in other words as a brackish environment. This approach gives a reasonable explanation for the ‘submergence’ of littoral organisms... Tipo: Article / Letter to the editor Ano: 1968 URL: http://www.repository.naturalis.nl/record/525977 Een tweede vondst van Plasmodiophora maritima in Nederland Naturalis Berge Henegouwen, A.L. van; Hartog, C. den. The parasitic fungus Plasmodiophora maritima G. Feldmann has recently been found in the Slufter salt marsh on the island of Texel; previously it had been recorded from the Balgzand salt marsh near Den Helder. The species causes conspicuous deformations of its host Triglochin maritima L. Tipo: Article / Letter to the editor Ano: 1973 URL: http://www.repository.naturalis.nl/record/527450 Distribution and ecology of the slugs Alderia modesta and Limapontia depressa in the Netherlands Naturalis Hartog, C. den. This paper deals with the slugs Alderia modesta (Lovén) and Limapontia depressa Alder & Hancock, both very common in the intertidal zone of the Dutch salt-marshes. Van Benthem Jutting & Engel did not mention them as native species in „Fauna van Nederland” 8, a monograph on Dutch Opisthobranchia, published in 1936. Alderia and Limapontia do not belong to the order of Nudibranchia, but to a separate order, Saccoglossa (Ascoglossa). They possess an uniseriate radula, the worn teeth of which fall in a pouch (saccus, ascus). Their way of life is different, the Nudibranchs feed mainly on hydroids, sea anemones, bryozoa, sponges, etc.; only a few species e.g. Polycera quadrilineata O. F. Müller feed on algae, while all west-european Saccoglossa feed... Tipo: Article / Letter to the editor Ano: 1959 URL: http://www.repository.naturalis.nl/record/505201 Blyxa Quadricostata nov. sp., a new Hydrocharitacea from Thailand Naturalis Hartog, C. den. The dioecious species of the genus Blyxa can be divided into 2 groups, those with 6 stamens and those with 9 stamens in the male flowers. The first group is restricted to tropical Africa and needs further study. The second group occurs in Asia and Australia and up to now was considered to consist of 2 very distinct species, Blyxa octandra (Roxb.) Planch, ex Thw., characterized by a basal rosette of long, smooth, linear leaves, and B. novoguineensis den Hartog which is caulescent with short serrulate leaves. B. octandra is widely distributed in India, Burma, Indo-China, New Guinea, and the tropical part of Australia. B. novoguineensis is known with certainty only from New Guinea. Recently a third species, very similar in its habit to B. octandra, was found... Tipo: Article / Letter to the editor Ano: 1973 URL: http://www.repository.naturalis.nl/record/525345 Plasmodiophora bicaudata, een parasiet op Zostera noltii Naturalis Hartog, C. den; Polderman, P.J.G.. The parasitic fungus Plasmodiophora bicaudata, which prevents the elongation of the internodes of Zostera noltii and gives the diseased plants a tufted appearance, has been found in three localities in the Netherlands but is obviously very rare. Tipo: Article / Letter to the editor Ano: 1973 URL: http://www.repository.naturalis.nl/record/526770 Registros recuperados: 37 Primeira ... 1 2 ... Última

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