Desmanthus topsenti Hentschel 1912
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2000
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| author | Van Soest, Rob W. M. Hajdu, Eduardo |
| author_facet | Van Soest, Rob W. M. Hajdu, Eduardo |
| contents | <p><i>Desmanthus topsenti</i> Hentschel, 1912</p><p>(Fig. 2G, H)</p><p>HOLOTYPE. — <b>Aru Islands.</b> Stn 77, Merton coll. (SMF 1560).</p><p>DISTRIBUTION. — Aru Islands (eastern Indonesia), on rocks at 20 m.</p><p>DESCRIPTION</p><p>Thinly encrusting, about 0.5 mm thick and 1.7 cm long. Surface hispid. Colour grey or brownish grey in alcohol. Structure compact.</p><p><i>Skeleton</i></p><p>The main skeleton consists of an irregular layer of desmas on which monactinal spicules are erected. <i>Spicules</i></p><p>Desmas which can be separated in basally arranged smaller desmas (Fig. 2H), presumably desmas I, with more tuberculate cladi, dimensions: 240-270 × 20 µm, and peripherally arranged more robust desmas (Fig. 2G), presumably desmas II, dimensions cladome: 200- 310 × 30-45 µm. They are not clearly separated morphologically and the larger desmas lack a distinct rhabdome. Monactinal spicules are styles and rhabdostyles, variable in form, size and curvature, the smaller sizes tend to be rhabdostyles, dimensions: 224-1000 × 14-31 µm.</p><p>REMARKS</p><p>Hentschel (1912) states that this species differs from <i>D. incrustans</i> mainly in the absence of clear rhabdomes in the desmas. A syntype specimen from the Senckenberg Museum was re-examined (SMF 1560, from stn 77 of the Merton collection described by Hentschel). The rhabdomes are certainly inconspicuous, but nevertheless there is a clear division in thinner and more robust desmas. So far no other specimens of this species have been recorded, but it is possible that some of the Indian Ocean records of <i>D. incrustans</i> are referable to this species.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_14907554 |
| institution | Zenodo |
| language | |
| publishDate | 2000 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Desmanthus topsenti Hentschel 1912 Van Soest, Rob W. M. Hajdu, Eduardo Biodiversity Taxonomy Animalia Porifera Demospongiae Bubarida Desmanthidae Desmanthus Desmanthus topsenti <p><i>Desmanthus topsenti</i> Hentschel, 1912</p><p>(Fig. 2G, H)</p><p>HOLOTYPE. — <b>Aru Islands.</b> Stn 77, Merton coll. (SMF 1560).</p><p>DISTRIBUTION. — Aru Islands (eastern Indonesia), on rocks at 20 m.</p><p>DESCRIPTION</p><p>Thinly encrusting, about 0.5 mm thick and 1.7 cm long. Surface hispid. Colour grey or brownish grey in alcohol. Structure compact.</p><p><i>Skeleton</i></p><p>The main skeleton consists of an irregular layer of desmas on which monactinal spicules are erected. <i>Spicules</i></p><p>Desmas which can be separated in basally arranged smaller desmas (Fig. 2H), presumably desmas I, with more tuberculate cladi, dimensions: 240-270 × 20 µm, and peripherally arranged more robust desmas (Fig. 2G), presumably desmas II, dimensions cladome: 200- 310 × 30-45 µm. They are not clearly separated morphologically and the larger desmas lack a distinct rhabdome. Monactinal spicules are styles and rhabdostyles, variable in form, size and curvature, the smaller sizes tend to be rhabdostyles, dimensions: 224-1000 × 14-31 µm.</p><p>REMARKS</p><p>Hentschel (1912) states that this species differs from <i>D. incrustans</i> mainly in the absence of clear rhabdomes in the desmas. A syntype specimen from the Senckenberg Museum was re-examined (SMF 1560, from stn 77 of the Merton collection described by Hentschel). The rhabdomes are certainly inconspicuous, but nevertheless there is a clear division in thinner and more robust desmas. So far no other specimens of this species have been recorded, but it is possible that some of the Indian Ocean records of <i>D. incrustans</i> are referable to this species.</p> |
| title | Desmanthus topsenti Hentschel 1912 |
| topic | Biodiversity Taxonomy Animalia Porifera Demospongiae Bubarida Desmanthidae Desmanthus Desmanthus topsenti |
| url | https://doi.org/10.5281/zenodo.14907554 |