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| Weerdt, Walentina H. de. |
| In order to find characters in Millepora species with a higher diagnostic value than the growth form (on which species delimitation is hitherto based) a comparison is made of the surface structure, microstructure of the skeleton, structure of the ampullae coverings, size of the gastropores and dactylopores, and pore density in specimens of the four species occurring in the Caribbean region: Millepora alcicornis, M. complanata, M. squarrosa, and M. striata. While most characters are of little taxonomic value, pore sizes and densities are surprisingly useful. The species are diagnosed and some biogeographical remarks are given. |
| Tipo: Article / Letter to the editor |
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| Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/504417 |
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| Weerdt, Walentina H. de. |
| In the present paper the north-eastern Atlantic Chalinidae (Porifera, Demospongiae) are systematically revised and redescribed; where necessary lectotype designations are made. Three genera are recognized, viz. Haliclona, Acervochalina and Dendroxea. The latter genus is not represented in the study area. Seventy-two nominal species have been described in Haliclona in the wide sense here employed (including species assigned to other genera here considered junior synonyms of Haliclona: Reniera, Gellius, Adocia, Toxadocia, Orina). Among these 72 nominal species 12 valid species are recognized. One species new to science is described, viz. Haliclona xena spec, nov.; 4 nominal species of Acervochalina are reduced to 2 valid ones. |
| Tipo: Article / Letter to the editor |
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| Ano: 1986 |
URL: http://www.repository.naturalis.nl/record/505186 |
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| Weerdt, Walentina H. de. |
| The taxonomic history of the sponge order Haplosclerida is reviewed, with emphasis on literature concerning the Haplosclerida of the North Eastern Atlantic Ocean. The characters and their value for a phylogenetic classification are discussed. Two families are treated systematically: the Oceanapiidae, which have two representatives in the area, and the Petrosiidae, represented by one species. Emended diagnoses for the order, families, and genera are given. |
| Tipo: Article / Letter to the editor |
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| Ano: 1985 |
URL: http://www.repository.naturalis.nl/record/504691 |
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