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| Weerdt, Wallie H. de. |
| The hydrocoral Millepora squarrosa (Hydrozoa, Coelenterata) exhibits a limited, partly disjunct, distribution in the tropical western Atlantic. In the Caribbean the species is known from the Dominican Republic, Puerto Rico, Vieques, Culebra, the Lesser Antilles arc, and Barbados. It also occurs in Brazil. It is hypothesized that M. squarrosa is the descendant of an ancestor shared with the Indo-Pacific species M. platyphylla and that vicariance events prior to the Pliocene uplift of the Panamanian Isthmus have induced speciation of this ancestor into these species. The restricted Caribbean distribution of M. squarrosa is hypothesized to be the result of extinction of this species in certain parts of the Caribbean and its inability to re-intrude in these... |
| Tipo: Article / Letter to the editor |
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| Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/505112 |
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| Weerdt, Wallie H. de. |
| The historical background of the taxonomic problems in the fire-coral, Millepora, is reviewed. The growth forms of the Caribbean species: Millepora alcicornis Linnaeus, M. complanata Lamarck and M. squarrosa Lamarck are investigated in relation with environmental factors: water movement, current, light and turbidity. Several sites on Curaçao and Bonaire were visited and all forms of Millepora collected. The localities have been divided in biotopes and the relative frequencies of the growth forms in these biotopes were studied. Some relations between growth forms and environment were found: delicately branched forms appear in deeper, quieter waters, sturdy forms in sites with strong water movement, incrusting forms in turbid and also in turbulent sites. At... |
| Tipo: Article / Letter to the editor |
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| Ano: 1981 |
URL: http://www.repository.naturalis.nl/record/504243 |
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| Weerdt, Wallie H. de. |
| All known species of the sponge family Chalinidae (Demospongiae, Haplosclerida) occurring in the shallower part of the Caribbean are described and taxonomically revised. The study is the result of collecting activities of the author and others throughout the Caribbean, and examination of type and other material in musea and institutes. In a previous revision of north-eastern Atlantic Chalinidae (De Weerdt, 1986, 1989), the family was subdivided into eight monophyletic species groups, with various states of the skeletal architecture as main synapomorphous (shared derived) characters. After examination of all available type species of the nominal genera of the family, the species groups are now given proper names, replacing the tentative names in the earlier... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Porifera; Demospongiae; Haplosclerida; Chalinidae; Caribbean; Monograph. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/505081 |
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| Zea, Sven; Weerdt, Wallie H. de. |
| Haliclona (Haliclona) epiphytica n.sp., a new species of seaweed-dwelling sponge of the family Chalinidae (Porifera, Demospongiae, Haplosclerida) from the Colombian Caribbean, is described. As the only member of the subgenus Haliclona (hitherto referred to as the ‘oculata’ group by De Weerdt, 1989) in the Caribbean Sea, it is distinguished from other chalinid species in this area by its regular, anisotropic, ladder-like skeleton of short and robust oxeas. |
| Tipo: Article / Letter to the editor |
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| Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/504916 |
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| Putchakarn, Sumaitt; Weerdt, Wallie H. de; Soncheang, Pichai; Soest, Rob W.M. van. |
| A new sponge species, Cladocroce burapha n. sp. (Chalinidae, Haplosclerida, Porifera), is described from Chonburi province, eastern coast of the Gulf of Thailand, Thailand. The new species can be separated from other Cladocroce species by a combination of characters, including growth form, form and size of the spicules, and habitat. This is the first record of the genus Cladocroce from Thailand. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Porifera; Haplosclerida; Chalinidae; Cladocroce; Gulf of Thailand; New species. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/504851 |
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