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A comparison of paraffin and resin-based techniques used in bark anatomy Naturalis
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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A comparison of the application of a biological and phenetic species concept in the Hebeloma crustuliniforme complex within a phylogenetic framework Naturalis
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
Ano: 2004 URL: http://www.repository.naturalis.nl/record/532249
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A comparison of the structure of ovules and seeds in Stemona (Stemonaceae) and Pentastemona (Pentastemonaceae) Naturalis
Bouman, F.; Devente, N..
Stemona and Pentastemona differ clearly in the size and structure of their ovules and seeds. Especially the development, shape, and cell wall thickenings of the endotestal cells, and by consequence the origin of the seed ridges, show marked differences. The embryological and seed anatomical characters support the proposal to give Pentastemona a family status.
Tipo: Article / Letter to the editor
Ano: 1992 URL: http://www.repository.naturalis.nl/record/524654
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A complementary note to my Review of the genus Rhipidura Naturalis
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
Ano: 1893 URL: http://www.repository.naturalis.nl/record/508832
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A comprehensive molecular phylogeny of the Mortierellales (Mortierellomycotina) based on nuclear ribosomal DNA Naturalis
Wagner, L.; Stielow, B.; Hoffmann, K.; Petkovits, T.; Papp, T.; Vágvölgyi, C.; Hoog, G.S. de; Verkley, G.; Voigt, K..
The basal fungal order Mortierellales constitutes one of the largest orders in the basal lineages. This group consists of one family and six genera. Most species are saprobic soil inhabiting fungi with the ability of diverse biotransformations or the accumulation of unsaturated fatty acids, making them attractive for biotechnological applications. Only few studies exist aiming at the revelation of the evolutionary relationships of this interesting fungal group. This study includes the largest dataset of LSU and ITS sequences for more than 400 specimens containing 63 type or reference strains. Based on a LSU phylogram, fungal groups were defined and evaluated using ITS sequences and morphological features. Traditional morphology-based classification schemes...
Tipo: Article / Letter to the editor Palavras-chave: Internal transcribed spacer; Large subunit ribosomal DNA; Taxonomic revision; Zygomycetes; Zygomycota.
Ano: 2013 URL: http://www.repository.naturalis.nl/record/531904
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A computer-based registration system for geological collections Naturalis
Germeraad, J.H.; Freudenthal, M.; Boogaard, M. van den; Arps, C.E.S..
The new computer-based registration system, a project of the National Museum of Geology and Mineralogy in the Netherlands, will considerably increase the accessibility of the Museum collection. This greater access is realized by computerisation of the data in great detail, so that an almost unlimited number of operations to select and sort the data is possible. A flexible design of annotating information, mainly in plain words, saves considerable time. The fast mechanical data processing permits the efficient preparation of catalogues which contain selected information about the geological collection; as an additional benefit labels may be produced at low costs. The RGM system disposes of the burden of classical registration books and card-indexes, without...
Tipo: Article / Letter to the editor Palavras-chave: 38.03.
Ano: 1972 URL: http://www.repository.naturalis.nl/record/317543
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A concise revision of the Flacourtiaceae of New Caledonia anf the Loyalty Islands Naturalis
Sleumer, H..
A taxonomic revision of the Flacourtiaceae of New Caledonia incl. the Loyalty Islands, based mainly on the recently very enriched materials deposited in the Paris Herbarium. This resulted in a total of 53 species, belonging to 4 genera: Casearia, Homalium, Xylosma, and the endemic genus Lasiochlamys; 21 species and 1 variety were described as new and 5 new combinations were made.
Tipo: Article / Letter to the editor
Ano: 1974 URL: http://www.repository.naturalis.nl/record/524625
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A conservation genetic study of Rafflesia speciosa (Rafflesiaceae): patterns of genetic diversity and differentiation within and between islands Naturalis
Pelser, P.B.; Nickrent, D.L.; Barcelona, J.F..
Rafflesia speciosa is a threatened endo-holoparasitic species. It has several populations in the Central Panay Mountain Range (CPMR) of Panay island and a single population on Negros Island. Because R. speciosa is the only Philippine species of the genus that is not endemic to an individual island, it is a suitable species for improving our understanding of the factors underlying the high island endemism of Philippine Rafflesia. For this purpose and to inform the conservation management of R. speciosa, patterns of genetic diversity and differentiation were studied using 15 microsatellite loci and samples from nine populations. None of these populations shows evidence of inbreeding and R. speciosa has similar levels of heterozygosity as generally observed...
Tipo: Article / Letter to the editor Palavras-chave: Microsatellites; Conservation; Negros; Panay; Philippines; Population genetics.
Ano: 2018 URL: http://www.repository.naturalis.nl/record/655789
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A conspectus of the families of Aphyllophorales Naturalis
Donk, M.A..
The author gives a recapitulation of the families of the Aphyllophorales. He is inclined to recognize 21: the families he is not (yet) prepared to uphold are discussed. The synonymy of the order and the families above the rank of genus is listed, but it is avowedly incomplete. The treatment of each family does not go further than the mention of the included genera, but through selected references cited for each genus in a special list, an introduction to the separate genera is provided. An introductory chapter contains some general remarks and discusses a number of terms used in connection with the treatment of the families. New taxa are, Brachybasidiales, Hericiaceae, Punctulariaceae, Asterostromatoideae, Pteruloideae, while the name Septobasidiales Couch...
Tipo: Article / Letter to the editor
Ano: 1964 URL: http://www.repository.naturalis.nl/record/532067
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A conspectus of the genus Bhesa (Celastraceae) Naturalis
Hou, Ding.
In his Numerical List Wallich inserted four specific epithets in the genus Kurrimia, viz 4334 K. pulcherrima Wall., 4335 K. calophylla Wall., 4336 K. paniculata Wall., and later 7200 K.? macrophylla Wall. The latter one was provided with a question mark; it was a new combination for Itea macrophylla Wall. No generic or specific descriptions were provided, merely the indication that the name Kurrimia was named in honour of Kurrim Khan who had faithfully served the Calcutta Botanic Garden as its curator for four decades. A few years later Walker-Arnott described a genus Bhesa Ham. ex Arn. (Edinb. New Phil. J. 16, 1834, 315) for which he provided a full generic description and brief but clear diagnoses of two species, viz B....
Tipo: Article / Letter to the editor
Ano: 1958 URL: http://www.repository.naturalis.nl/record/526349
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A conspectus of the native and naturalized species of Nephrolepis (Nephrolepidaceae) in the world Naturalis
Hovenkamp, P.H.; Miyamoto, F..
All species of the genus Nephrolepis are reviewed and described. 19 species are recognized, with 3 varieties, and 7 putative or confirmed hybrids are briefly discussed. Two new combinations are made, of which one as the result of a transferral of species to varietal rank. One variety and two hybrids are described as new. A change of name is proposed for the commonly recognized N. falcata and N. multiflora.
Tipo: Article / Letter to the editor Palavras-chave: Nephrolepis.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/525219
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A conspectus og the genus Allophylus (Sapindaceae). The problem of the complex species Naturalis
Leenhouts, P.W..
Allophylus, at present with c. 255 accepted species, is considered as one of the largest genera of the Sapindaceae. It is distributed throughout the tropics of the Old and the New World, and shows a wide ecological range. Although somewhat variable in vegetative characters, there is a striking homogeneity in fertile characters, by which the generic disposition is easily spotted all over the world. Specific delimitation is renowned difficult in this genus (chapter 2). An analysis of the revision given by Radlkofer in his monograph of the Sapindaceae in ‘Das Pflanzenreich’, Heft 98 (1931—34) reveals that the characters, accepted by him as diagnostic, are all extremely vague, and often grading or overlapping. Of course, the species defined by these characters...
Tipo: Article / Letter to the editor
Ano: 1967 URL: http://www.repository.naturalis.nl/record/525034
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A contribution to our knowlegde of the Sigalioninae Naturalis
Horst, R..
Though our knowledge of the Sigalioninae much increased in the last years thanks to the assiduous investigations of Mc Intosh, Pruvot et Racovitza 1), Darboux, Willey a. o., yet there still reigns a good deal of confusion about the exact diagnosis of the genera. Sthenelais simplex Ehl. 2) f. i. has rightly been ranged by Augener among the genus Leanira 3); Leanira Giardi Darb.4) according to the investigations of Marenzeller belongs to Sthenelais 5) and Thalenessa stylolepis Willey 6) will prove, as I presume, to be a species of Sigalion. Partly this may be ascribed to the circumstance, that only a few of the investigators could dispose of a large material and therefore must borrow their knowledge from the often inadequate descriptions of others; but it...
Tipo: Article / Letter to the editor Palavras-chave: 42.76.
Ano: 1916 URL: http://www.repository.naturalis.nl/record/319324
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A contribution to the fern flora of French Guiana Naturalis
Kramer, K.U..
In recent times very little has been published on the fern flora of French Guiana. In 1918, R. BONAPARTE published a list of fern specimens, collected chiefly by Leprieur and Mélinon (p. 365: Guyane franςaise, plusieurs collecteurs, herbier du Prince Bonaparte; apart from some scattered notes in other volumes of Notes Ptéridologiques); POSTHUMUS’s records of ferns from that region, which are included in his work on the ferns of Surinam (1928), were partly based on Bonaparte’s work, but comparatively little new material had been added to the existing collections. Consequently, when Mme M. Tardieu-Blot informed me that the Paris herbarium contained some unidentified collections of Pteridophytes from that region, I accepted willingly her offer to study them....
Tipo: Article / Letter to the editor
Ano: 1955 URL: http://www.repository.naturalis.nl/record/535035
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A contribution to the intraspecific systematics of Bufo bufo (Linnaeus, 1758) (Amphibia) Naturalis
Lange, L. de.
A biometrical analysis of preserved specimens of Bufo bufo, supplemented by a detailed examination of the shape of the skin warts, was performed in order to ascertain the taxonomic status of the form described as B.b.spinosus. Indications of a N.-S. clinal variation in the formation of wart thorns and in allometric relations of body elements were found. The validity of the form as a distinct subspecies seems accordingly very doubtful.
Tipo: Article / Letter to the editor
Ano: 1973 URL: http://www.repository.naturalis.nl/record/504705
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A contribution to the investigation of the Holocene history of the beech in the eastern Netherlands Naturalis
Daniels, A.G.H..
To study the immigration and spreading of the beech (Fagus sylvatica L.) in the Netherlands during the young Holocene, three peat bogs were palynologically investigated in the eastern Netherlands and in the adjacent German area. For this purpose peat samples have been collected in the Korenburgerveen near Winterswijk, in a peat bog near Burlo (Germany) and in the Aamsveen south-east of Enschede. The analysis of the peat-samples proved, that extensive beech-forests existed in subatlantic times in the subcentreuropean flora district of the Netherlands. This is shown in the comparatively high Fagus-percentages in the pollendiagrams.
Tipo: Article / Letter to the editor
Ano: 1964 URL: http://www.repository.naturalis.nl/record/535092
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A contribution to the knowledge of non-marine Mollusca of South West Africa Naturalis
Bruggen, A.C. van.
The moment to collate scattered notes on South West African non-marine molluscs arrived last year when Mr. B. H. Lamoral of the Natal Museum, Pietermaritzburg (South Africa), entrusted the present author with the study of material obtained during a Council of Scientific and Industrial Research (C.S.I.R., Pretoria)-sponsored collecting trip. During Mr. Lamoral's explorations in 1969 in South West Africa non-marine molluscs were obtained as a sideline. Nevertheless the material is certainly considered sufficiently interesting to warrant publication. South West African material from various sources was studied and the following abbreviations have been used: BM for British Museum (Natural History), London; NM for Natal Museum, Pietermaritzburg; RMNH for...
Tipo: Article / Letter to the editor Palavras-chave: 42.73.
Ano: 1970 URL: http://www.repository.naturalis.nl/record/318771
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A contribution to the knowledge of the genus Spheginobaccha De Meijere (Diptera, Syrphidae) Naturalis
Doesburg Sr., P.H. van.
In 1883 J. M. F. Bigot described Speghina? macropoda after one female from "Birmania". Bigot used to place a question mark after the generic name when he was not sure that the described species did belong to the genus in question. The not forwardly produced oral margin, the presence of a facial tubercle, the spinose hind femora, and the wing-venation created a doubt about the correct use of the name Sphegina. He thought macropoda might need a new genus. De Meijere (1908) erected the new genus Spheginobaccha with Sphegina macropoda Bigot as type-species. He recorded one ♂ and one ♀ from Semarang, Java. He described both specimens and figured the wing. Though in many respects his female answered to Bigot's description of the female, De Meijere found also...
Tipo: Article / Letter to the editor Palavras-chave: 42.75.
Ano: 1968 URL: http://www.repository.naturalis.nl/record/319403
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A Contribution to the knowledge of the Indian Maydeae Naturalis
Henrard, J.Th..
The grasses constitute a very well defined natural group of plants, but the division of this family into tribes and subtribes is a difficult problem. We know that ROBERT BROWN divided the family into the Panicaceae and the Poaceae. BENTHAM already indicated that in the former the tendency to imperfection lies in the lower flowers of the spikelets, whereas in the Poaceae the tendency is in the opposite direction, but he observes at the same time that this principle is too indefinite to serve as a practical character to recognize both groups. In combination with other characters, especially those taken from the fruits (the caryopsis, enclosed by the scales), these two groups become however more stabile. KUNTH gave us no less than 13 tribes, many of them...
Tipo: Article / Letter to the editor
Ano: 1931 URL: http://www.repository.naturalis.nl/record/508354
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A contribution to the knowledge of the Melastomataceae occurring in the Malay Archipelago especially in the Netherlands East Indies Naturalis
Bakhuizen van den Brink, R.C..
Originally it had been my intention to write a monograph of the Melastomataceae occurring in the Malay Archipelago. Owing to difficulties caused by the development of the political situation it was impossible for me, to carry out this plan to its full extent. As the important collections of the Herbarium of the Buitenzorg Botanical Garden could not be consulted and as most foreign herbaria too were inaccessible, I had to restrict myself almost entirely to the study of the collections preserved in the Utrecht and Leyden Herbaria. These however, though not so rich as those of the Buitenzorg herbarium, are very important, especially by the large number of type specimens. Of the great number of species described from parts of the Malay Archipelago outside the...
Tipo: Article / Letter to the editor
Ano: 1943 URL: http://www.repository.naturalis.nl/record/534897
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