Symplectoscyphus frondosus Peña, 2010, sp. nov.
Symplectoscyphus frondosus sp. nov. (Figures 1 A–C, 2, Table 2) Material examined. Stn 82, two complete stems 165 (NIWA 60488) and 65 mm high (MNCN 2.03/ 437), the latter with immature male gonothecae; Stn 102 VV, one fragment c. 6 mm long, with immature female gonothecae (NIWA 60489); Stn 103, thre...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2010
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| Online Access: | https://zenodo.org/record/5622799 https://doi.org/10.5281/zenodo.5622799 |
| Summary: | Symplectoscyphus frondosus sp. nov. (Figures 1 A–C, 2, Table 2) Material examined. Stn 82, two complete stems 165 (NIWA 60488) and 65 mm high (MNCN 2.03/ 437), the latter with immature male gonothecae; Stn 102 VV, one fragment c. 6 mm long, with immature female gonothecae (NIWA 60489); Stn 103, three stems 85, 40 (NIWA 60490) and 30 mm high (MNCN 2.03/ 438); Stn 108, one branched stem c. 300 mm high, with male gonothecae (holotype, NIWA 60491), 16 S sequence FN 424151; Stn 171, two stems 100 (NIWA 60492) and 95 mm high (MNCN 2.03/ 439), with male gonothecae, on mollusc shell. Other material. Symplectoscyphus liouvillei (Billard, 1914): Spanish Antarctic Expedition Bentart 95, Stn 5 A, 23 –01– 95, 62º41.6855' S 60 º31.8195' W (south of Livingston Island, the South Shetland Islands), 256 m, twelve stems up to 185 mm high. Description (Holotype): Erect, main stem strongly sinuous, giving rise to primary branches spirally arranged, with a complete whorl every five branches. Roughly all branches of similar development, which gives the colony a bottlebrush appearance (Fig. 1 A). Stem completely and strongly polysiphonic. Branches also with well-developed polysiphony, but becoming monosiphonic distally. Usually only most distal part of branches monosiphonic. Stem branched (Fig. 1 A), giving rise to two secondary stems at c. 80 and 110 mm high, 80 and 150 mm long, respectively. The latter, in turn, forming a third-order stem c. 80 mm long. Lower-order stems originating from much developed primary branches. Rhizoidal hydrorhiza composed of relatively thin stolons, some attached to gravel (Fig. 1 A). Basalmost part of stem, however, forms a disc-shaped hydrorhiza, clearly indicating original settlement on hard substrate (e.g. pebbles, gravel). First 60 mm of main stem were clearly buried in sediment, as there are numerous rhizoidal stolons, some attached to gravel, and there are either no branches at all basally or just the proximal part of them at distal part (Fig. 1 A). Branching much developed (Fig. 1 A, B), though all ... |
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