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| Registros recuperados: 14.605 | |
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| Soest, R.W.M. van. |
| Although sponges are by no means unimportant organisms, in biomass and diversity, of the Curaçao coral reefs, very few scientific studies have been undertaken in this area involving sponges. To date, apart from taxonomie studies by Arndt (1927) and myself (Van Soest, 1978, 1980), only the boring sponges received attention (e.g. studies of De Groot, in progress). The main reason for this, no doubt, is the confused taxonomy of West Indian sponges. While taxonomie studies are in full progress (but are necessarily slow), it is now already possible to present sufficient data to allow certain identification of the more common reef forms by non-taxonomists for ecological or other purposes. It is one of the objects of the present paper to provide these data; they... |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/506324 |
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| Ritsema Cz., C.. |
| The Stagbeetle described in the following lines and belonging to the genus Metopodontus of the subfamily Cladognathinae is very interesting by having five pubescent leaflets in the clava of the antennae. In all other known species of this subfamily the number of these leaflets is three. This is, as far as I know, the second example of an inconstant number of leaflets in the species of one and the same genus of the Lucanidae Lucanus and Metopodontus). In coloration as well as in general form the new species, for which I propose the specific title spectabilis, resembles Metopodontus cinctus Montr. |
| Tipo: Article / Letter to the editor |
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| Ano: 1912 |
URL: http://www.repository.naturalis.nl/record/508652 |
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| Wilkinson, C.; Bryan, G.; Menken, S.B.J.; Nieukerken, E.J. van. |
| The status of the four taxa Ectoedemia angulifasciella, E. atricollis, E. rubivora and E. arcuatella, has always been in debate. They have now been studied using several different systematic methods, relating to morphology, gel electrophoresis, host plant differentiation, life histories and distribution. Evidence is given here which demonstrates that they should be regarded as two pairs of sibling species. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ectoedemia angulifasciella; E. atricollis; E. rubivora; E. arcuatella; Sibling species; 42.75. |
| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/365073 |
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| Farjon, A.; Rushforth, K.D.. |
| Previous classifications of the genus Abies are reviewed and evaluated. A number of subgeneric names are lectotypified and a list of the validly named subgeneric taxa is given. A new classification scheme is proposed in which Abies is divided into ten sections, four of which are further divided into subsections. Three new subsectional names are proposed. A key to the sections and subsections is given and their morphological characteristics and biogeography discussed. |
| Tipo: Article / Letter to the editor |
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| Ano: 1988 |
URL: http://www.repository.naturalis.nl/record/535254 |
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| Holthuis, L.B.. |
| The Sumba-Expedition undertaken by Dr. E . Sutter of the Naturhistorisches Museum of Basle and Dr. A . Bühler of the Museum für Völkerkunde of the same town, visited the Lesser Sunda Islands, Indonesia, in 1949. Dr. Sutter, the zoologist, stayed in the islands from 19 May to 26 November; most of the time was spent by him in Sumba (21 May-31 October), and extensive collections were made there, among which a most interesting material of Decapod Crustacea, which forms the subject of the present paper. A few Crustacea were collected on the islands of Sumbawa (on 19 May) and Flores (19 and 21 November). The animals taken at Flores belong to species also obtained in Sumba and will be treated here with those; at Sumbawa two hermit crabs belonging to the species... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Decapod Crustacea; Indonesia; Sumba; Sumbawa; Flores; 42.74. |
| Ano: 1978 |
URL: http://www.repository.naturalis.nl/record/323937 |
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| Rowe, F.W.E.. |
| Twenty-seven species of holothurian are recorded from the East Indies, including a new species in the synaptid genus Protankyra collected from the central north coast of Java. The majority of the species are widely distributed throughout the Indo-west Pacific region. However, Labidoplax incerta (Ludwig, 1875), known only from Java, is recorded for the second time from the same area. |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.72. |
| Ano: 1983 |
URL: http://www.repository.naturalis.nl/record/318196 |
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| Benson, R.B.. |
| I have lately received for determination some very interesting sawflies collected in Java mostly by Dr. J. van der Vecht. The collection contained eight species not recorded in Forsius' recent list of Javan Sawflies (Forsius 1934), six of these being entirely new species. The types of these new species have been deposited in the Rijksmuseum van Natuurlijke Historie, Leiden, Holland; paratypes and duplicate specimens where available have been retained in the British Museum. In addition to these I have added the description of a new species of Anapeptamena given to the British Museum by Dr. C. Ferriére. The additions to the Javan fauna are listed below. ORUSSIDAE Ophrynopus maculpennis (Smith) Bajoekidoel, Banjoewangi, East Java, 1 ♂, IX. 1932, Toxopeus... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1935 |
URL: http://www.repository.naturalis.nl/record/318053 |
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| Stebbings, R.E.. |
| This study began in November, 1960 and involved studies of all bats living within one large and complex roof. Furzebrook House, built in 1885, was of brick with hollow walls and a black slate roof. The roof consisted of 9 distinct sections comprising some 385 m³ of which 60 % was accessible for searching. Eight species were caught in these accessible regions and because Plecotus spp. were the most numerous, they became the chief study. The study became more significant when Plecotus austriacus (Fischer) (first described by Bauer, 1960), was identified in the roof. Detailed descriptions of the two English Plecotus have already been published (cf. Stebbings, 1967). The aim of this report is to present evidence that might suggest reasons for the distribution... |
| Tipo: Article / Letter to the editor |
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| Ano: 1970 |
URL: http://www.repository.naturalis.nl/record/504055 |
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| Matthes, H.. |
| Although there exists an extremely voluminous literature on Cyprinid fishes and the morphology and physiology of some species has been intensively studied by various authors, very little is yet known about feeding mechanisms and their functioning in most members of this family. So far as known, only some European species — e.g. Cyprinus carpio, Carassius auratus, Rutilus rutilus Gobio gobio — one Asian (Labeo rohita), and one African (Labeo horie) have been investigated thoroughly as regards their morphology in relation to their feeding habits. Moreover ,the ecology of most African species is only scantily known. |
| Tipo: Article / Letter to the editor |
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| Ano: 1963 |
URL: http://www.repository.naturalis.nl/record/504603 |
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| Drift, J. van der. |
| 1. In the coastal area of Suriname the soil and surface fauna were studied in various types of agricultural land, and compared with the fauna in the adjacent forests. 2. In primeval forest the soil macroarthropods are less numerous than in secondary forest (Formicidae excluded). They range generally from 2,000 to 3,000 per m2 in the primeval forest and from 3,000 to 4,500 per m2 in the secondary forest. In cultivated land the numbers range in general from 1,500 to 2,500 per m2. In recently reclaimed land the numbers of soil macroarthropods are very small and amount to 15-30% of those in the adjacent forests. In the older agricultural soils they range from 50 up to 130% of the numbers of arthropods in forest soil. 3. The surface fauna is best developed in... |
| Tipo: Article / Letter to the editor |
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| Ano: 1963 |
URL: http://www.repository.naturalis.nl/record/506301 |
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| Rabaey, D.; Lens, F.; Huysmans, S.; Smets, E.; Jansen, S.. |
| Recent micromorphological observations of angiosperm pit membranes have extended the number and range of taxa with pseudo-tori in tracheary elements. This study investigates at ultrastructural level (TEM) the development of pseudo-tori in the unrelated Malus yunnanensis, Ligustrum vulgare, Pittosporum tenuifolium, and Vaccinium myrtillus in order to determine whether these plasmodesmata associated thickenings have a similar developmental pattern across flowering plants. At early ontogenetic stages, the formation of a primary thickening was observed, resulting from swelling of the pit membrane in fibre-tracheids and vesselelements. Since plasmodesmata appear to be frequently, but not always, associated with these primary pit membrane thickenings, it remains... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ontogeny; Pseudo-torus; Tracheary element; Pit membrane; Bordered pit; Wood ultrastructure; 42.56. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/430078 |
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| Weinberg, Steven. |
| Seven coral reef survey methods were compared in an experimental plot of 100 m² on a Caribbean shelf reef off southwest Puerto Rico. This area was mapped in detail by means of underwater photography and in situ drawings, in order to provide an objective standard against which to test the results obtained by the different survey methods. Minimal survey area was determined, and minimal sampling time deduced for one of the most laborious methods. Two 45-minute periods (i.e. 1.6 X minimal time) were chosen arbitrarily as the standard time alotted to each method. Three survey criteria were chosen: number of species observed, relative coverage (in %) and population densities (in colonies m²). The results of the latter two methods were compared to real values (as... |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/504554 |
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| O'Herne, L.. |
| Foraminiferal collections from Java and Borneo stored in the Netherlands National Museum of Geology and Mineralogy in Leiden enables to study the range of variation in Lepidocyclina ferreroi and L. multilobata. Taken separately many features considered typical of L. multilobata and L. ferreroi are insufficient to identify the specimens. When typically developed both species are highly characteristic and easily distinguished. Transitional forms however cannot be classified with certainty. Possibly L. multilobata has evolved from L. ferreroi but too little is known about the ages of the two species, especially of L. multilobata. L. crucifera is probably a form of L. ferreroi with four rays distinguished by the development of more than one tubercle on each... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.20. |
| Ano: 1976 |
URL: http://www.repository.naturalis.nl/record/317538 |
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| Hamann, T.; Smets, E.; Lens, F.. |
| Bark anatomy is an unappreciated discipline in plant systematics, despite its great potential to reveal systematically informative features. In this paper, main reasons for the lack of detailed bark anatomical data in many plant families are identified, including problems with sectioning, terminological issues, and difficulties in observation of dilated stems. We deal with these problems by focusing on two aspects: (1) compare, discuss and improve existing sectioning and maceration techniques using two species with soft and hard bark tissues; and (2) discuss the best way to collect stem bark samples. We hope that this paper will stimulate inclusion of bark anatomical data in future systematic studies. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bark anatomy; Light microscopy; Macerations; Plant systematics; Phloem; Sectioning; 42.54. |
| Ano: 2011 |
URL: http://www.repository.naturalis.nl/record/421834 |
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| Aanen, Duur K.; Kuyper, Thomas W.. |
| A method is presented to derive an operational phenetic species concept for the Hebeloma crustuliniforme complex in northwestern Europe. The complex was found to consist of at least 22 biological species (intercompatibility groups; ICGs). Almost none of these biological species could be recognised unambiguously by morphological criteria. It is therefore necessary to base a phenetic species concept on combinations of biological species. However, such species delimitation must be performed within an explicitly phylogenetic context. It is crucial therefore to have a reliable estimate of the phylogeny of 22 biological species in that complex. Based on two nuclear sequences, we present a best estimate of the phylogeny of biological species within the complex.... |
| Tipo: Article / Letter to the editor |
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| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/532249 |
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| Büttikofer, J.. |
| When, in my » Review of the genus Rhipidura”, I was to decide what to make of the two specimens from Mount Arfak, described antea, p. 82, species 43, I believed them, on the authority of Dr. A. B. Meyer, to be specifically distinct from his R. cinnamomea. Our Arfak birds, as well as the specimens mentioned by Dr. Meyer as R. brachyrhyncha, , thus belonging neither to this latter species nor to the closely allied R. cinnamomea Meyer, nor being, in my mind, the females of R. atra Salvad., they were enregistered as a new species, which I named R. meyeri in honor of Dr. Meyer, who was the first to give a description of the bird and who only with some hesitation identified it with R. brachyrhyncha Schlegel. |
| Tipo: Article / Letter to the editor |
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| Ano: 1893 |
URL: http://www.repository.naturalis.nl/record/508832 |
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| Registros recuperados: 14.605 | |
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