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| Format: | Recurso digital |
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Zenodo
2019
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| Accés en línia: | https://doi.org/10.5281/zenodo.14829066 |
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- <p><b><i>DESMOXYA PELAGIAE</i> VAN SOEST & HOOPER, 2005</b></p><p>(FIG. 20A–H)</p><p><i>Desmoxya pelagiae</i> Van Soest & Hooper, 2005 (pp. 1368–1370, fig. 2a–h).</p><p><i>Material examined:</i> Holotype ZMA POR18145, M2004 BX33A, Rockall Bank, S part, 55°30.288′N, 15°47.148′W, 2 September 2004, 673 m.</p><p>BELUM Mc 7764, 54°4.435′N, 12°31.507′W, CE10004 of RV <i>Celtic Explorer</i>, 27 May 2010, coll. C. Morrow, det. C. Morrow.</p><p><i>DNA sequences:</i> From BELUM Mc 7764, we sequenced partial <i>CO1</i> (GenBank accession no. KC876696) and 28S (D3–D5, GenBank accession no. KF018109). The 18 S GenBank sequence KC902064 is from the same specimen.</p><p><i>Remarks:</i> A re-examination of the type specimen of <i>Desmoxya pelagiae</i> found acanthostyle spicules and unidirectional spines on the raphides (similar to onychaetes) that were overlooked in the original description (Fig. 20 shows an SEM of the spicules from the type specimen). The acanthostyles are relatively scarce and confined to the basal region of the sponge. They measure 288– <i>314–</i> 353 µm × 9–10 µm (<i>N</i> = 6; measurements taken at middle portion of shaft), the heads of the acanthostyles are ~12 µm across.</p><p>The presence of acanthostyles and onychaetes suggests an affinity with Tedaniidae (Poecilosclerida). Figure 20G, H illustrates the spicule composition in <i>Desmoxya # pelagiae</i> and <i>Tedania</i> (<i>Trachytedania</i>) cf. <i>ferrolensis</i> (Cristobo & Urgorri, 2001), respectively. Both species share strongyles, raphides and acanthostyles. In addition, <i>Desmoxya pelagiae</i> has bow-shaped acanthose microscleres with unidirectional spines.</p>