Symplectoscyphus paulensis Stechow 1923

• Main Authors: Galea, Horia R., Schuchert, Peter
• Format: Text
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Sertulariidae; Symplectoscyphus; Symplectoscyphus paulensis; Weddell Sea; Bellingshausen Sea; Pacific; Indian; New Zealand; Weddell; Pena; Yelcho; Antarc*; Antarctica; Macquarie Island
• Online Access: https://dx.doi.org/10.5281/zenodo.3475342; https://zenodo.org/record/3475342

Symplectoscyphus paulensis Stechow, 1923 Figs 16C, 17 K–M; Table 11 Symplectoscyphus paulensis Stechow, 1923: 8. Symplectoscyphus vervoorti El Beshbeeshy, 2011: 184, fig. 61. Symplectoscyphus paulensis – Stechow 1925: 467, fig. 28. — Millard 1967: 183, fig. 4G–H; 1975: 317, fig. 102A–C; 1977: 107; 1978: 199; 1979: 142; 1980: 144, fig. 5A–B. — Vervoort 1972: 180, figs 60B, 61; 1993: 263, figs 63, 65A. — Hirohito 1983: 51, fig. 24. — Vervoort & Watson 2003: 222, fig. 53A–B. — Watson 2003: 170, fig. 20. — Soto Àngel & Peña Cantero 2019: 37, fig. 11I. Sertularella paulensis – Stepanjants 1979: 71, pl. 17 fig. 2. Material examined PACIFIC OCEAN • a colony, 3 × 3.2 cm, without gonothecae; off New Caledonia, stn DW4759; 23°12′ S, 168°03′ E; 317–343 m; 26 Aug. 2016; KANACONO leg.; one fragment was used for DNA extraction, DNA 1390; voucher MHNG-INVE- 120851; barcode identifier MK 073104; MNHN-IK-2015-393 • a fertile colony, 4.5 × 5 cm; same collecting data as for preceding; MNHN-IK-2015-393. Remarks The present material fits the description and illustrations given by Vervoort (1993) of S. paulensis . It is mainly characterized by 1) its rootlike hydrorhiza, firmly adhering the colony to a hard substrate; 2) the stem is unbranched but fascicled, tending to monosiphonic distally; 3) the internodes are weakly indicated, and composed of a minute apophysis (supporting a cladium) together with its associated axillar hydrotheca, as well as two alternate hydrothecae above; 4) the cladia are given off regularly in an alternate manner; unbranched, up to 3 cm long, composed of up to 26 hydrothecate internodes separated by weak oblique nodes; 5) the gonothecae are laterally flattened, with undulated walls; aperture rounded atop of a neck region borne on a terminal, slightly depressed plateau; likely female, containing 1–2 large, ovoid bodies. El Beshbeeshy (2011) created S. vervoorti for material studied earlier by both Vervoort (1972, as S. paulensis ) and Stepanjants (1979, as Sertularella paulensis ), on the account of 1) wider internodes and nodes; 2) hydrothecae circular in cross section and isodiametric throughout; 3) hydrothecal aperture everted, rim provided with pointed cusps. However, in light of the reexamination of the lectotype of S. paulensis by Vervoort (1993: fig. 43A–D) and the comparative measurements given in Table 11, this doesn’t seem justified. Indeed, Vervoort (1993: 263) clearly stated that the “Valdivia material is in perfect agreement with specimens described by Vervoort (1972: 180–183, figs 60b, 61)”. Distribution Off St. Paul (Stechow 1923), off Mozambique (Millard 1967), Vema Seamount (Vervoort 1972), South Africa (Millard 1975), Patagonian Shelf (Stepanjants 1979; El Beshbeeshy 2011, as S. vervoorti sp. nov.), New Caledonia (Vervoort 1993, present study), New Zealand (Vervoort & Watson 2003), Japan (Hirohito 1983), Macquarie Island (Watson 2003) and Antarctica (Peña Cantero 2012; Soto Àngel & Peña Cantero 2019). : Published as part of Galea, Horia R. & Schuchert, Peter, 2019, Some thecate hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program, pp. 1-70 in European Journal of Taxonomy 562 on pages 50-51, DOI: 10.5852/ejt.2019.562, http://zenodo.org/record/3474305 : {"references": ["Stechow E. 1923. Neue Hydroiden der Deutschen Tiefsee-Expedition, nebst Bemerkungen uber einige anderen Formen. Zoologischer Anzeiger 56 (1 - 2): 1 - 20.", "El Beshbeeshy M. 2011. 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