Sertularella sanmatiasensis El Beshbeeshy 2011
Description
Sertularella sanmatiasensis El Beshbeeshy, 2011
Fig. 16 E-G; Table 23
Sertularella sanmatiasensis El Beshbeeshy, 2011: 148, fig. 47. – Soto Àngel & Peña Cantero, 2015: 996, fig. 7H-I.
non Sertularella sanmatiasensis. – (?) Peña Cantero, 2006: 939, fig. 3L. – (?) Peña Cantero & Gili, 2006: 767. – (?) Peña Cantero, 2008: 459, fig. 2C. – (?) Peña Cantero & Vervoort, 2009: 87, fig. 2B. – Peña Cantero, 2012: 858, fig. 4A; 2013: 130 (possibly all = Sertularella antarctica Hartlaub, 1901).
Sertularella polyzonias. – Blanco, 1984: 37, pls 31-36; 1994: 200 [non Sertularella polyzonias (Linnaeus, 1758)].
Material examined: ZMH C11560; FRV Walther Herwig, Stn. 283, Argentine Shelf, -42.21667° -58.1000°, 500 m; 21.06.1966; numerous colony fragments up to 2.3 cm high, all sterile, with only the perisarc left (holotype).
Description: Colonies composed of upright, monosiphonic, unbranched or sparingly-branched stems, up to 5 cm high; a few basal annuli above origin from stolon; divided by oblique nodes into internodes of varied length, longer basally, gradually decreasing distally; a hydrotheca, or a hydrotheca and a short, lateral apophysis below its base, confined to the distal end of each internode. Branching pattern with a tendency to alternate; first internode with a number of spiral twists proximally, and comparatively longer than subsequent ones. Hydrothecae biseriate, alternate, coplanar to occasionally slightly shifted on to one side of the colony; large, flask-shaped, adnate for about 1/3rd their adaxial length; a characteristic notch at origin of free adaxial wall, then hydrotheca conspicuously swollen on same side, till below the aperture, where it is constricted; perisarc either smooth or with up to 3 undulations; abaxial wall straight to slightly concave; 4 marginal, blunt-ended triangular cusps of equal development separated by shallow, semicircular embayments; 3 intrathecal, submarginal cusps (2 latero-adaxial, 1 abaxial), variably present; rim not thickened, margin occasionally renovated up to 3 times. Gonothecae arising from below the hydrothecae; broadly ovoid, tapering below, walls undulated to nearly smooth; aperture distal, surrounded by 4 pointed cusps in male, less developed or absent in female; acrocysts in the latter.
Dimensions: See Table 23.
Remarks: The gonothecae of this species, absent in the material studied by El Beshbeeshy (2011), were documented earlier by Blanco (1984, as S. polyzonias). The intrathecal, submarginal cusps occur very inconstantly: sometimes only the abaxial one is present, sometimes only the pair of latero-adaxial, and occasionally the complete set of three occurs.
It was stated under S. antarctica that it is likely that some records assigned to S. sanmatiasensis in various papers (co)authored by Peña Cantero belong in fact to Hartlaub’s (1901) species. For instance, it is certain that the materials dealt with in Peña Cantero (2012, 2013) belong to the latter.
Distribution: Argentina – between Provincia de Río Negro and Provincia del Chubut [off Golfo San Matías (El Beshbeeshy, 2011)]. Scotia Arc – South Sandwich Is. (Soto Àngel & Peña Cantero, 2015). Antarctica – Isla Baja (Blanco, 1984, as S. polyzonias), Palmer Archipelago (Blanco, 1994, as S. polyzonias).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Sertulariidae
- Genus
- Sertularella
- Kingdom
- Animalia
- Order
- Leptothecata
- Phylum
- Cnidaria
- Scientific name authorship
- El Beshbeeshy
- Species
- sanmatiasensis
- Taxon rank
- species
- Taxonomic concept label
- Sertularella sanmatiasensis Beshbeeshy, 2011 sec. Galea, Schories, Häussermann & Försterra, 2017
References
- 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.
- Soto Angel J. J., Pena Cantero A. L. 2015. On the benthic hydroids from the Scotia Arc (Southern Ocean): new insights into their biodiversity, ecology and biogeography. Polar Biology 38 (7): 983 - 1007.
- Pena Cantero A. L. 2006. Benthic hydroids from the south of Livingston Island (south Shetland Islands, Antarctica) collected by the Spanish Antarctic Expedition Bentart 94. Deep Sea Research II 53: 932 - 948.
- Pena Cantero A. L., Gili J. M. 2006. Benthic hydroids (Cnidaria, Hydrozoa) from off Bouvet Island (Antarctic Ocean). Polar Biology 29: 764 - 771.
- Pena Cantero A. L., Vervoort W. 2009. Benthic hydroids (Cnidaria: Hydrozoa) from the Bransfield area (Antarctica) collected by Brazilian expeditions, with the description of a new species. Polar Biology 32 (1): 83 - 92.
- Pena Cantero A. L. 2012. Filling biodiversity gaps: benthic hydroids from the Bellingshausen Sea (Antarctica). Polar Biology 35 (6): 851 - 865.
- Hartlaub C. 1901. Revision der Sertularella - Arten. Abhandlungen aus dem Gebiete der Naturwissenschaften, Hamburg 16 (2) (1): 1 - 143.
- Blanco O. M. 1984. Contribucion al conocimiento de hidrozoos antarticos y subantarticos. Contribucion del Instituto Antartico Argentino 294: 1 - 53.
- Linnaeus C. 1758. Systema naturae per regna tria natura, secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis. Editio decima, reformata. L. Salvii, Holmiae, 823 pp.
- Pena Cantero A. L. 2013. Benthic hydroids from off Low Island (Southern Ocean, Antarctica). Marine Ecology 34 (Suppl. 1): 123 - 142.
- 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.