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| Engelhard, G.H.; Slik, J.W.F.. |
| Several forms of Albinaria idaea (L. Pfeiffer, 1849) have been described as (sub)species from various sites on Mt. Ida (Central Crete). In recent years, however, much additional material has been collected, which made clear that no sharp boundaries exist between these forms. Moreover, several characters proved to be altitude dependent to a certain extent. It may be concluded that on Mt. Ida only a single evolutionary entity can be distinguished, viz. A. i. idaea. On the isolated Mt. Kedros, south-west of Mt. Ida, an undescribed allopatric form was found, which because of its smaller size and differences in altitude dependent characters was given subspecific rank as A. i. amabilis ssp. nov. On the Paximadia Isles, south of Central Crete, a percostate and a... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Gastropoda; Pulmonata; Clausiliidae; Albinaria; Taxonomy; Altitudinal variation; Greece; 42.73. |
| Ano: 1994 |
URL: http://www.repository.naturalis.nl/record/318732 |
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| Welzen, P.C. van; Slik, J.W.F.. |
| Distribution patterns or the recognition of phytogeographical areas is usually based on the presence and absence of species. The taxa on which the analyses are based remain virtually anonymous. Here we want to determine which Malesian plant families (within the sample) are responsible for species richness and composition patterns. The other aim is to determine whether the different islands groups in Southeast Asia can be grouped into separate phytogeographical areas. A Principal Coordinates Analysis (PCO) showed the presence of three phytogeographical areas within Malesia: The Sunda Shelf (Malay Peninsula, Sumatra, Borneo) in the west, the Sahul Shelf (New Guinea) in the east, and all remaining central areas forming Wallacea. The latter can be divided into... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Floristic patterns; Malay Archipelago; Malesia; PCO; Plant families; Species richness. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/525639 |
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| Slik, J.W.F.; Welzen, P.C. van. |
| Mallotus sections Hancea and Stylanthus from Malesia are revised. Descriptions, distribution ranges, habit drawings and keys to all the species in these two sections are provided. The diagnostic characters for the sections are discussed briefly in the section headings. Mallotus section Hancea is defined more precisely than before, resulting in the exclusion of 4 species from this section (M. brachythyrsus, M. havilandii, M. insularum (new rank) and M. miquelianus). Mallotus beccarii is synonymised with M. brachythyrsus, and M. tenuipes with M. penangensis. This section contains 12 species. In Mallotus section Stylanthus, M. oblongifolius is synonymised with M. peltatus. This section contains 6 species. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Mallotus; Section Hancea; Section Stylanthus; Malesia; Taxonomy. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/525368 |
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| Sierra, S.E.C.; Welzen, P.C. van; Slik, J.W.F.. |
| A revision of Mallotus section Philippinenses (former section Rottlera) in Malesia and Thailand is given. Descriptions, distribution maps, habit drawings, and a key to the species are provided. The diagnostic characters for the section are briefly discussed. Five species (M. kongkandae, M. leptostachyus, M. pallidus, M. philippensis, and M. repandus) are recognised. Mallotus chromocarpus is excluded from the section because it has more shared characters with the monospecific genus Octospermum, like the presence of indehiscent fruits, absence of stipules, marginal extrafloral nectaries on the upper side of the leaf blade, broad connectives (shaped umbrella-like), and its occurrence in New Guinea, and is therefore probably closely related to it. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Euphorbiaceae; Rottlerinae; Mallotus; Philippinenses; Rottlera; Octospermum; Malesia; Taxonomy. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/525257 |
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