Silicularia rosea Meyen 1834
Silicularia rosea Meyen, 1834 (fig. 4 G–M, table 6) Silicularia rosea Meyen, 1834: 204, pl. 35 figs 1–11. – Hartlaub, 1905: 572, figs V 1, X 1, Y 1. – Vervoort & Watson, 2003: 442, fig. 108 A–D. ? Campanularia bilabiata Coughtrey, 1875: 291, pl. 20 figs 46–49. ? Hypanthea bilabiata – Hilgendorf,...
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2009
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Online Access: | https://dx.doi.org/10.5281/zenodo.6212460 https://zenodo.org/record/6212460 |
Summary: | Silicularia rosea Meyen, 1834 (fig. 4 G–M, table 6) Silicularia rosea Meyen, 1834: 204, pl. 35 figs 1–11. – Hartlaub, 1905: 572, figs V 1, X 1, Y 1. – Vervoort & Watson, 2003: 442, fig. 108 A–D. ? Campanularia bilabiata Coughtrey, 1875: 291, pl. 20 figs 46–49. ? Hypanthea bilabiata – Hilgendorf, 1898: 213, pl. 20 figs 5, 5A. Silicularia bilabiata – Bale, 1924: 233, fig. 4. – Ralph, 1956: 285, fig. 2 A, C. – Naumov & Stepanjants, 1962: 73, fig. 2. Silicularia bilabiata forma intermedia – Ralph, 1956: 286, figs 2 F, 3 A–D. Silicularia bilabiata forma subantarctica – Ralph, 1956: 287, fig. 3 K. Silicularia bilabiata forma subtropica – Ralph, 1956: 286, figs 2 D, 3 E–J. Eucopella campanularia p.p. von Lendenfeld, 1883: 497, pl. 29 fig. 15 D', D 1 / 2. – Bale, 1888: 751, pl. 13 figs 9–15. Silicularia campanularia – Bale, 1914: 84, pl. 13 figs 1–6. – Hodgson, 1950: 6, figs 12–13. Hypanthea aggregata Allman, 1888: 27, pl. 14 figs 1, 1A. Hypanthea repens Allman, 1876: 115. Hypanthea hemisphaerica Allman, 1888: 27, pl. 14 figs 2, 2A. Silicularia hemisphaerica – Hartlaub, 1905: 576, figs Z 1, A 2. – Jäderholm, 1905: 18, pl. 7 fig. 3. Hypanthea atlantica Marktanner-Turneretscher, 1890: 211, pl. 3 fig. 14. Hypanthea asymmetrica Hilgendorf, 1898: 212, pl. 20 fig. 4. – Hartlaub, 1901 b: 366, pl. 22 figs 24–26. Eucopella reticulata Hartlaub, 1905: 569, fig. R 1. Silicularia reticulata – Nutting, 1915: 91, pl. 25 figs 3–4. Material examined . Stn. 10 – 24.02.2008, 8 m, A 504 (MHNG INVE 62833): numerous hydrothecae and several female gonothecae, on weeds. Type locality . Not designated by Meyen (1834). For a list of his records, see Vervoort & Watson 2003. Description . Colony stolonal, with polyps arising at irregular intervals from branched, anastomozing, thick-walled stolon. Hydrothecal pedicels of moderate length, slightly constricted at origin from stolon; perisarc very thick, entirely smooth; subhydrothecal spherule present. Hydrotheca long, inverted-conical, asymmetrical, walls straight to slightly undulated or curved; oval in cross-section (bilaterally symmetrical), with perisarc much thickened laterally in frontal view, and lesser on front and rear sides (fig. 4 I); perisarc exceptionally thickened towards base of hydrotheca, delimiting an ovoid to nearly tubular basal chamber of varied height; aperture perpendicular to long axis of hydrotheca; rim even, not everted. Only remnants of hydranths present; tentacle number could not be checked. Gonothecae borne on stolon; female in present material, immature; pear-shaped, laterally compressed, with thickened, slightly undulated lateral walls; distal end truncated to broadly rounded, with wide, operculate aperture; proximal end tapering abruptly into short, smooth pedicel. Gonothecal content badly preserved; one central, large medusoid and a smaller, basal one, the latter often disintegrated in majority of gonothecae examined and fine structure could not be observed. Nematocysts (undischarged): large capsules (9.4–10.8) × (2.8–3.1) µm; small capsules ca . 5.6 × 1.4 µm. Remarks . The position of hydrothecal aperture in the present material is rather peculiar, and is similar to that observed by Coughtrey (1875) in his Campanularia bilabiata . Nearly all the variants of Silicularia rosea (Meyen, 1834) described in the literature have the aperture obviously inclined to one side (see references above). The peculiar feature observed by us probably occurs only seldomly, but still belongs to the normal range of variation found in this species. Additionally, the long hydrothecae belong to Ralph’s (1956) forma subantarctica . On the other hand, the female gonothecae are immature in the present material, with the characteristic, distal part not formed yet. Comparison of the Chilean specimens with female colonies from Tristan da Cunha (South Atlantic), bearing both mature and immature gonothecae (Galea, unpublished results), leave no doubt about the earliness of their development. Immature female gonothecae, with similar morphology, were illustrated by both Ralph (1956) (p. 292, fig. 3 I) and Blanco (1967 a) (p. 224, fig. 5) for specimens originating from New Zealand and Argentina, respectively. Nevertheless, additional studies on Chilean material are necessary to evaluate the intraspecific variation modulated by both genetic and ecological factors, as well as the examination of the morphology of male colonies. World distribution . Circumglobal in Antarctic and subantarctic waters (Vervoort & Watson 2003). Records from Chile . Strait of Magellan (Jäderholm 1903, as H. repens ), Navarino Island (Hartlaub 1905, as S. hemisphaerica ), South of Chiloé Island (present study). – pedicel diameter 130–180 – – – – : Published as part of Galea, Horia R., Häussermann, Verena & Försterra, Günter, 2009, New additions to the hydroids (Cnidaria: Hydrozoa) from the fjords region of southern Chile, pp. 1-28 in Zootaxa 2019 on pages 18-19, DOI: 10.5281/zenodo.186052 : {"references": ["Meyen, F. J. F. (1834) Beitrage zur Zoologie gesammelt auf einer Reise um die Erde, von Dr F. J. F. Meyen. V. Ueber das Leuchten des Meeres und Beschreibung einiger Polypen und anderer niederer Tiere. Novorum Actorum Academiae Caesareae Leopoldino-Carolinae Naturae Curiosorum, 16, 125 - 216.", "Hartlaub, C. (1905) Die Hydroiden der Magalhaensischen Region und chilenischen Kuste. In: Fauna chilensis. Zoologische Jahrbucher, Suppl. 6 (3), 497 - 714.", "Vervoort, W. & Watson, J. E. (2003) The marine fauna of New Zealand: Leptothecata (Cnidaria: Hydrozoa) (Thecate Hydroids). NIWA Biodiversity Memoir, 119, 1 - 538.", "Coughtrey, M. (1875) Notes on the New Zealand Hydroidae. Transactions of the Royal Society of New Zealand, 7, 281 - 293.", "Hilgendorf, F. W. (1898) On the hydroids of the neighbourhood of Dunedin. Transactions and Proceeding of the New Zealand Institute, 30, 200 - 218.", "Bale, W. M. (1924) Report on some hydroids from the New Zealand coast, with notes on New Zealand Hydroida generally, supplementing Farquhar's list. Transactions and Proceedings of the New Zealand Institute, 55, 225 - 268.", "Ralph, P. M. (1956) Variation in Obelia geniculata (Linnaeus, 1758) and Silicularia bilabiata (Coughtrey, 1875) (Hydroida, F. Campanulariidae). Transactions of the Royal Society of New Zealand, 84 (2), 279 - 296.", "Naumov, D. V. & Stepanjants, S. D. (1962) Gidroidy podotryada Thecaphora, sobrannye v antarkticheskikh i subantarkticheskikh vodakh sovetskoi antarkticheskoi ekspeditsiei na dizel' - elektrokhode \" Ob \". In: Resul'taty biologicheskikh issledovanii sovetskoi antarkticheskoi ekspeditsii (1955 - 1958 gg), 1. Issledovaniya Fauny Morei, 1 (9), 69 - 104.", "Von Lendenfeld, R. (1883) Ueber Coelenteraten der Sudsee, IV. Eucopella Campanularia nov. gen. Zeitschrift fur Wissenschaftliche Zoologie, 38, 497 - 583.", "Bale, W. M. (1888) On some new and rare Hydroida in the Australian Museum collection. Proceedings of the Linnean Society of New South Wales, 2 (3) 2, 745 - 799.", "Bale, W. M. (1914) Further notes on Australian hydroids. III. Proceedings of the Royal Society of Victoria, 27 (1), 72 - 93.", "Hodgson, M. M. (1950) A revision of the Tasmanian Hydroida. Papers and Proceedings of the royal society of Tasmania, 1949, 1 - 65.", "Allman, G. J. (1888) Report on the Hydroida dredged by H. M. S. Challenger during the years 1873 - 76. Part II. The Tubularinae, Corymorphinae, Campanularinae, Sertularinae and Thalamophora. Report on the Scientific Results of the Voyage of H. M. S. Challenger during the year 1873 - 76, Zoology, 23 (70), 1 - 90.", "Allman, G. J. (1876) Descriptions of some new species of Hydroida from Kerguelen's Island. Annals and Magazine of Natural History, (4) 17 (98), 113 - 115.", "Jaderholm, E. (1905) Hydroiden aus antarktischen und subantarktischen Meeren gesammelt von der schwedischen Sudpolar-Expedition. Wissenschaftliche Ergebnisse der Schwedischen Sudpolar-Expedition 1901 - 1903, 5 (8), 1 - 41.", "Marktanner-Turneretscher, G. (1890) Die Hydroiden des k. k. naturhistorischen Hofmuseums. Annalen des Naturhistorischen Museums in Wien, 5, 195 - 286.", "Hartlaub, C. (1901 b) Hydroiden aus dem Stillen Ocean. Ergebnisse einer Reise nach dem Pacific (Schauinsland 1896 - 97). Zoologische Jahrbucher. Abteilung fur Systematik, Geographie und Biologie des Tiere, 14 (6), 349 - 379.", "Nutting, C. C. (1915) American hydroids. Part III. The Campanularidae and Bonneviellidae. Special Bulletin of the United States National Museum, 4 (3), 1 - 126.", "Blanco, O. M. (1967 a) Estudio critico sobre las especies del genero \" Silicularia \" Meyen, 1834. Revista del Museo de La Plata, 9 (70), 217 - 241.", "Jaderholm, E. (1903) Aussereuropaische Hydroiden im schwedischen Reichsmuseum. Arkiv for Zoologi, 1, 259 - 397."]} |
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