Sertularella mediterranea Hartlaub 1901

• Main Authors: Galea, Horia R., Schories, Dirk, Häussermann, Verena, Försterra, Günter
• Format: Text
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Sertulariidae; Sertularella; Sertularella mediterranea; Argentina; Uruguay; Blanco; Garzón; Spitzbergen
• Online Access: https://dx.doi.org/10.5281/zenodo.6029745; https://zenodo.org/record/6029745

Sertularella mediterranea Hartlaub, 1901 Fig. 14 A-E; Table 16 Sertularella mediterranea Hartlaub, 1901: 86, pl. 5 figs 10- 11, 15-16. – Genzano, 1990: 47, figs 13-15. – Blanco, 1994: 199. – Genzano & Zamponi, 2003: 308. Sertularella uruguayensis Mañé Garzón & Milstein, 1973: 21, fig. 1 ( syn. nov. ). – Milstein, 1976: 85, figs 25, 28, 29, 36. Sertularella picta. – Blanco, 1967: 112, pl. 3 figs 1-7 [non Ser- tularella picta (Meyen, 1834) ]. Material examined: HRG-0001; France, La Ciotat, 43.174850° 5.611921°, 0.5 m, coll. H.R. Galea; 16.03.2003; male colony composed of numerous stems, up to 4 cm high. Description: Stems erect, up to 1.5 cm high, monosiphonic, sparingly and irregularly branched. Internodes rather short, delimited by deep, oblique constrictions of the perisarc, basally with a more or less marked bulge; first internodes of side branches comparatively longer than subsequent ones, with 2-3 basal twists; distally a hydrotheca to each internode. Hydrothecae flask-shaped, adnate for less than half their length, swollen basally (notably on adaxial side), constricted below aperture; rim with 4 cusps, abaxial one conspicuously produced, adaxial one the shortest, and recurved outwards; rim not thickened; 3 internal, submarginal projections of perisarc (2 lateroadaxial, 1 abaxial). Gonothecae arising from below the hydrothecal bases, broadly ovoid, walls with 6-9 transverse ridges, aperture surrounded by 4 (rarely 5) pointed cusps. Dimensions: See Table 16. Remarks: The description given above is based on Argentinean material, and combines both Blanco’s (1967, as S. picta ) and Genzano’s (1990) accounts. Blanco (1994) regarded her earlier record as conspecific with the present species, although El Beshbeeshy (2011) still believed that it belonged to Meyen’s hydroid. The occurrence of S. mediterranea Hartlaub, 1901 in Argentina is plausible, as additional remote records are, for instance, from South Africa (Millard, 1975). There are no objective reasons to separate specifically S. uruguayensis Mañé Garzón & Milstein, 1973 from the Argentinean hydroid. Both form colonies composed of short, erect, sparingly branched stems, their internodes are short, and each bears a flask-shaped hydrotheca, conspicuously swollen adaxially, and provided with a produced abaxial, marginal cusp, as well as with 3 internal, submarginal perisarc projections [Mañé Garzón & Milstein (1973); Genzano (1990)]. In addition, the measurements given by these authors for their respective materials are comparable (see Table 16 herein), and both originate from localities close to one another. Distribution: Uruguay – Cabo Polonio (Mañé Garzón & Milstein, 1973, as S. uruguayensis ). Argentina – Provincia de Buenos Aires [Mar del Plata (Blanco, 1967, as S. picta Genzano 1990)]. Elsewhere – widely distributed in the Mediterranean and the eastern Atlantic, from Spitzbergen to South Africa (Ramil et al ., 1992). : Published as part of Horia R. Galea, Dirk Schories, Verena Häussermann & Günter Försterra, 2017, Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species, pp. 255-321 in Revue suisse de Zoologie 124 (2) on pages 289-291, DOI: 10.5281/zenodo.893519 : {"references": ["Hartlaub C. 1901. Revision der Sertularella - Arten. Abhandlungen aus dem Gebiete der Naturwissenschaften, Hamburg 16 (2) (1): 1 - 143.", "Genzano G. N. 1990. Hidropolipos (Cnidaria) de Mar del Plata. Neritica 5 (1): 35 - 54.", "Blanco O. M. 1994. Enumeracion sistematica y distribucion geografica preliminar de los Hydroida de la Republica Argentina. Suborden Athecata (Gymnoblastea, Anthomedusae), Thecata (Calyptoblastea, Leptomedusae) y Limnomedusae. Revista del Museo La Plata (Zoologia) 14 (161): 181 - 216.", "Genzano G. N., Zamponi M. O. 2003. Hydroid assemblages from Mar del Plata, Argentina, at depths between 0 and 500 m. Distribution and biological substrata. Oceanologica Acta 25: 303 - 313.", "Mane-Garzon F., Milstein A. 1973. Una nueva especie del genero Sertularella, Gray, 1847. Revista de Biologia, Uruguay 1 (1): 19 - 23.", "Milstein A. 1976. Hydroidea de las costas Uruguayas. Dusenia 9 (3): 77 - 93.", "Blanco O. M. 1967. Un nuevo aporte al conocimiento de la fauna hidroide Argentina. Revista del Museo de La Plata 10 (77): 97 - 127.", "Meyen F. J. F. 1834. Uber das Leuchten des Meeres und Beschreibung einiger Polypen und anderer niederer Thiere. In: Beitrage zur Zoologie, gesammelt auf einer Reise um die Erde. Verhandlungen der Kaiserlichen Leopoldinisch- Carolinischen Akademie der Naturforscher 16 (Suppl.): 125 - 216.", "El Beshbeeshy M. 2011. Thecate hydroids from the Patagonian shelf (Coelenterata, Hydrozoa, Thecata). Edited by G. Jarms. Verhandlungen des Naturwissenschaftlichen Vereins in Hamburg 46: 19 - 233.", "Millard N. A. H. 1975. Monograph on the Hydroida of southern Africa. Annals of the South African Museum 68: 1 - 513.", "Ramil F., Parapar J., Vervoort W. 1992. The genus Sertularella Gray, 1848 (Cnidaria: Hydroida) along the coasts of Galicia (Spain). Zoologische Mededelingen, Leiden 66 (37): 493 - 524."]}