Sertularella blanconae El Beshbeeshy, 2011,

Galea, Horia R., Schories, Dirk, Försterra, Günter & Häussermann, Verena, 2014, New species and new records of hydroids (Cnidaria: Hydrozoa) from Chile, Zootaxa 3852 (1), pp. 1-50: 32-33

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Sertularella blanconae El Beshbeeshy, 2011


Sertularella blanconae El Beshbeeshy, 2011 

(Plate 3 A; Figs 6 C; 7 B)

Material examined. HF 11, Isla Level, lat. - 44.47348, long. - 74.20472, 24.xi.2011, 25 m, sample C 128: fragmentary (up to 7 cm high) male colony, on dead gorgonian (MHNG-INVE- 86244). HF 11, Isla Teresa, lat. - 44.95713, long. - 73.79447, 27.xi. 2011, 21.6 m, sample C 234: profuse, sterile colony with stems up to 16 cm high (MHNG-INVE- 86243).

Remarks. In an earlier account ( Galea & Schories 2012 a) only scarce, fragmentary, infertile specimens were available for description. The present material, especially sample C 234, comprises large colonies, up to 16 cm high (Pl. 3 A). The stems and side branches are polysiphonic for most of their length. The ramification is irregular, with the side branches arising from below a stem hydrotheca (or a higher order branch), either laterally (Fig. 6 C) or slightly displaced towards the front or the rear side of the colony, giving it a general fan shaped appearance. The auxiliary tubes in the polysiphonic parts are rather tortuous and anastomose frequently. Sample C 128 is a male colony and allows the first description 17 of the gonotheca to be made. The gonothecae are typical of the genus: fusiform, lateral walls with up to 8 transverse ridges, of which the 5–6 distalmost are complete and prominent, while the remaining ones are fading off towards the base. The aperture is borne of the summit of a short, neck region, and is flanked by four blunt-ended projections of perisarc (Fig. 7 B).

Distribution in Chile. Previous records are from the Strait of Magellan ( Galea & Schories 2012 a), while the present material originates from Level and Teresa islands.

World records. See Galea & Schories (2012 a).

PLATE 3. In situ colonies of Sertularella blanconae El Beshbeeshy, 2011  (A), Staurotheca jaederholmi Stechow, 1920  (F), and Aglaophenia divaricata (Busk, 1952)  (G). Preserved colonies of Sertularella pauciramosa  sp. nov. (B), Symplectoscyphus semper  sp. nov. (C), Symplectoscyphus cf. subarticulatus ( Coughtrey, 1875)  (D), and Symplectoscyphus  sp. (E). Photos by H.R.G. (B ‒E), G.F. & V.H. (A, F), and D.S. (G).