Scopaegorgia, details & authors & information & http & www.tandfonline.com & loi & tnah20, 2010
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publication ID |
https://doi.org/ 10.1080/00222933.2010.485739 |
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persistent identifier |
https://treatment.plazi.org/id/DF05F009-FFD8-FFA4-B101-FB13163CFBA9 |
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treatment provided by |
Felipe |
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scientific name |
Scopaegorgia |
| status |
gen. nov. |
Scopaegorgia View in CoL gen. nov.
Diagnosis
Primnoidae with a bottlebrush colony shape with simple branchlets. Polyps cylindrical and straight to stem, arranged in whorls, not present on main stem. Opercular scales relatively large, pointed or with small thorn, keel present on the inner surface, eight in number. Marginal scales fan shaped with acute or rounded tip, without spine or keel, seven in number (two adaxial, two lateral and three abaxial). Body scales similar to marginal scales in shape and ornamentation. All adaxial sclerites smaller or reduced. Coenenchymal scales plate-like, with a deeper layer of tuberculate irregulars.
Etymology
The generic name combines scopae - meaning broom-shape, and - gorgia, a common suffix in gorgonian generic names. Gender: feminine.
Type species
Stenella liouvillei Gravier, 1913
Scopaegorgia liouvillei ( Gravier, 1913) View in CoL comb. nov. ( Figures 2–6 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 )
Stenella (Dasystenella) liouvillei Gravier, 1913: 590 ; 1914: 63–69, pl. 2, figs 9–11, pl. 4, fig. 20, text figs 77–85.
Examined material
Holotype: MNHN Oct.0000-0233, Seconde Expedition Antarctique Francaise (1908–1910), Pourquoi Pas?, dredge VIII, Marguerite Bay, Bellingshausen Sea, Antarctica, 176 m depth, 20 November 1909. Additional material: CRO-0060, ANT XVII- 3, stn 65-01, 71°17.60′ S, 13°48′ W, Cape Norvegia, Antarctica, 615 m depth, 31 March 2000, one colony; CRO-0061, ANT XVII- 3, stn 109-01, 71°11.30′ S, 12°18.50′ W, Cape Norvegia, Antarctica, 311 m depth, 4 April 2000, one colony; ZIZMH 11746, ANT XIX /3, stn PS61/048-01, 61°09.82′ S, 54°33.40′ W, east of Elephant Island, Antarctica, 277.6–343.2 m depth, 30 January 2001, one broken colony; ZIZMH 11747, ANT XIX /5, stn PS61/052-01, 61°20.76′ S, 55°13.80′ W, south Rowett Island, Elephant Island, Antarctica, 264.0–270.0 m depth, 31 January 2001, four colonies; MNA 2460, ANT XIX /3, stn PS61/066-01, 60°53.13′ S, 55°22.96′ W, north of Seal Rocks, north-west of Elephant Island, Antarctica, 301.2–439.6 m depth, 4 February 2002, one colony; CRO-0055, ANT XIX /3, stn PS61/071-01, 60°58.83′ S, 55°49.74′ W, north-west of Elephant Island, Antarctica, 160.0– 187.2 m depth, 5 February 2002, one colony; MNA 2461, ANT XIX /3, stn PS61/111-01, 61°51.83′ S, 59°15.71′ W, north-west Bridgeman Islands, South Shetland Islands, Antarctica, 262.5–269.9 m depth, 16 February 2002, two colonies; CRO-0059 and CRO-0064, ANT XIX /5, stn PS61/252-01, 61°23.45′ S, 55°26.82′ W, north of Gibbs Island, south-west of Elephant Island, Antarctica, 285.0–288.0 m depth, 25 April 2002, one colony each; CRO-0054, ANT XXI /2, stn PS65/276-1, 71°6.44′ S, 11°27.76′ W, Cape Norvegia, Antarctica, 277 m depth, 28 December 2003, one colony; MNA 2462, ANT XXI /2, stn PS65/292-01, 72°51.43′ S, 19°38.62′ W, West Cape, Eastern Weddell Sea, Antarctica, 596.4–597.6 m depth, 31 December 2003, one colony; CRO-0062, VLT ITALICA (XIX) , stn H-OUT-4, 72°17.2′ S, 170°23.9 E, Moubray Bay, Ross Sea, Antarctica, 204–208 m depth, 4 February 2004, one colony; CRO-0063, VLT ITALICA (XIX) , stn H-OUT-2 (bis), 72°17.5′ S, 170°29.4′ E, Moubray Bay, Ross Sea, Antarctica, 339–353 m depth, 11 February 2004, one colony; CRO-0066, ANT XXIII /8, stn 605-01, 61°20.35′ S, 55°29.16′ W, north of Gibbs Island, southwest of Elephant Island, Antarctica, 151.3 m depth, 19 December 2006, two colonies and one broken colony; CRO-0053, ANT XXIII /8, stn 605-05, 61°20.27′ S, 55°30.92′ W, north of Gibbs Island, south-west of Elephant Island, Antarctica, 153.4 m depth, 20 December 2006, one colony; NHMB 1364, ANT XXIII /8, stn 608-01, 61°11.34′ S, 54°43.17′ W, east of Elephant Island, Antarctica, 293 m depth, 20 December 2006, two fragmented colonies; CRO-0065, ANT XXIII /8, stn 611-01, 60°58.90′ S, 55°11.31′ W, north of Elephant Island, Antarctica, 215.1 m depth, 21 December 2006, one fragment; USNM 1139275, ANT XXIII /8, stn 654-06, 61°22.80′ S, 56°03.84′ W, north-west of Gibbs Island, south-west of Elephant Island, Antarctica, 342.3 m depth, 29 December 2006, one fragment; CRO-0052, ANT XXIII /8, stn 695-01, 63°00.55′ S, 58°38.01′ W, Bransfield Strait, Antarctica, 269.4 m depth, 6 January 2007, one colony; USNM 1139276, ANT XXIII /8, stn 696-01, 63°00.52′ S, 58°49.68′ W, Bransfield Strait, Antarctica, 360.5–361.2 m depth, 6 January 2007, one colony.
Description of the holotype
Colony ( Figure 2A View Figure 2 ) 23 cm total height and about 4 cm width, bottlebrush with simple branchlets, up to 3.4 cm long, all around. Axis ochre in colour, broken in its proximal portion, without holdfast. Basal axis diameter of 0.29 mm and 4.5 cm height up to the first branchlet.
Polyps straight and directly upward to branchlet, placed in whorls ( Figure 2B View Figure 2 ), four or five polyps per whorl and four or five whorls per centimetre. Polyps not present on main stem. Polyps ( Figure 3 View Figure 3 ) elongated, cylindrical, with a conical operculum; polyp about 1.6–2.3 mm in high and 0.51–0.67 mm diameter. Polyp body with seven longitudinal rows of scales, six or seven scales on each longitudinal abaxial row ( Figure 4 View Figure 4 ) overlapping one another.
Eight opercular scales ( Figure 5A View Figure 5 ), large, 0.28–0.75 by 0.16–0.45 mm, shaped like an isosceles triangle with acute tip. Proximal inner surface tuberculated, covering at least half of their longitude; distal surface smooth with apical keel. Proximal outer surface granulated, distal quite smooth. Basal margin with digitate processes, free margin finely serrated. Two adaxial scales smaller, lancet-shaped with acute tip and with a small incipient keel on inner surface.
Marginal scales ( Figure 5B View Figure 5 ) seven in number: two adaxials, two lateral and three abaxials; 0.45–0.64 by 0.34–0.45 mm, fan-shaped with acute tip, two adaxial marginal scales smallest 0.25–0.33 mm maximum length, round in shape. Proximal inner surface tuberculated, covering up to 80% of their longitude, in adaxials completely tuberculate, without spine. Distal inner surface smooth, inconspicuous or without keel. Outer surface smooth. Basal margin with digitate processes, free margin finely serrated.
Body scales ( Figure 6A View Figure 6 ) oval-fan shape, 0.33–0.52 by 0.40–0.63 mm. Proximal inner surface almost completely tuberculate, distal inner surface smooth. Outer surface smooth. Free margin as in marginal scales.
Coenenchymal scales ( Figure 6B View Figure 6 ) from outer layer round, oval-shaped, 0.13– 0.48 mm maximum length; inner surface tuberculate, large warts, outer surface granulated or smooth, free margin finely serrated. Coenenchymal inner layer with tuberculate irregular sclerites.
Variations from holotype
The general colonial structure of the paratypes and additional material examined is quite similar to that of the holotype. They range in size between 13 and 47.5 cm height and 3.8 and 9.7 cm width. The simple branchlets, which can reach 5.3 cm long, arise from all around the main stem, sometimes so close that they seem to have their bases fused. Branchlets can be positioned more or less perpendicular to the stem, but generally they are inclined upwards. Polyps are arranged in whorls from four to eight, and their density ranges between four and seven whorls per centimetre. The form of polyps is similar to those in the holotype, from 1.4 to 2.3 mm height and from 0.49 to 0.72 mm diameter. Distribution and form of the sclerites from polyps and coenenchyme are as in the holotype.
Geographical and bathymetrical distribution
At present, Scopaegorgia liouvillei ( Gravier, 1913) comb. nov., is known from Marguerite Bay, Bellingshausen Sea; Bransfield Strait, around Elephant and South Shetland Islands, eastern Weddell Sea (West Cape and Cape Norvegia) and Moubray Bay from the eastern Ross Sea, Antarctica ( Figure 1 View Figure 1 ), between 151.3 and 597.6 m in depth.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Scopaegorgia
| details, Publication, authors, including instructions for, information, subscription, http, www. tandfonline. com, loi & tnah 20 2010 |
Stenella (Dasystenella) liouvillei
| Gravier CH 1914: 63 |
| Gravier CH 1913: 590 |