Myriotrochus antarcticus Smirnov and Bardsley, 1997
publication ID |
https://doi.org/ 10.24199/j.mmv.2010.67.06 |
publication LSID |
lsid:zoobank.org:pub:5A8C650E-A34A-4072-A797-0A75D218DD7C |
persistent identifier |
https://treatment.plazi.org/id/365B627F-FF8A-FFD0-FF64-5FC5FAE05ABB |
treatment provided by |
Felipe |
scientific name |
Myriotrochus antarcticus Smirnov and Bardsley, 1997 |
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Myriotrochus antarcticus Smirnov and Bardsley, 1997 View in CoL
Figures 3 View Figure 3 , 4 View Figure 4 ; table 2
Myriotrochus sp. MoV 2039 O’Loughlin et al., 1994: 553, table 2. Myriotrochus antarcticus Smirnov and Bardsley, 1997: 109–111 View in CoL , fig. 1, table 1.— O’Loughlin et al. 2009: 9.
Material examined. Holotype. Eastern Antarctica, 66º55'S 62º32'E, 113 m, M. O’Loughlin, 11 Feb 1993, NMV F69125 About NMV . GoogleMaps
Other material. Western Antarctica, South Orkney Is, 60.82ºS 46.49ºW, 216 m, BAS GoogleMaps stn PB–EBS–4, 18 Mar 2006, NMV F168638 About NMV (1) ; F168643 (1 whole, for molecular sequence, tissue code MOL AF 805 ); RBINS IG 31 About RBINS 459 (2 whole, for SEM figures); NHM 2010 . 48–49 (2); Weddell Sea , 71.25º S 13.00º W, 193 m, RBINS 628686 About RBINS GoogleMaps (1).
Diagnosis (following Smirnov and Bardsley 1997 for Prydz Bay holotype). Myriotrochid species up to 8 mm long; 12 peltato-digitate tentacles, up to 8–12 digits per tentacle, distalmost pair longest; lacking tentacle ossicles; calcareous ring comprising 10 plates, ventral plates not significantly longer than dorsal plates; two dorsolateral radial plates each with 2 prominent tapering anterior projections, remaining plates with single prominent tapering anterior projection; posterior margin of calcareous ring slightly undulating, not concave; ossicles myriotrochid wheels only, scattered sparsely and uniformly throughout body wall; wheels of one type, all teeth pointing to centre of hub; wheel ossicle diameters 140–150 µ m (for S Orkneys specimens 80–144 µ m; for Weddell Sea specimen 108–133 µ m), spokes 15–16 (for S Orkneys 13–16; for Weddell Sea 13–15), teeth 22–24 (for S Orkneys 19–25; for Weddell Sea 22–24), spokes/teeth % 66.7–68.2 (for South Orkneys 64–68; for Weddell Sea 60.8–65.2), hub diameter/wheel diameter % 18.0–18.6 (for S Orkneys 16.0–18.1), teeth length/wheel diameter % 18.0–18.6 (for S Orkneys 14.4–16.0).
Colour (preserved). Body grey, translucent; tentacles white.
Distribution. Antarctic shelf species; Eastern Antarctica, western MacRobertson Shelf, 113 m; Western Antarctica, South Orkney Is, 216 m; Weddell Sea, 193 m (range 113–216 m).
Remarks. For Myriotrochus antarcticus Smirnov and Bardsley, 1997 there are only minor morphological differences for the limited number of measurements for specimens from the Scotia Sea, Weddell Sea and Prydz Bay, suggesting a morpho-species with an eastern and western Antarctic distribution.
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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Myriotrochus antarcticus Smirnov and Bardsley, 1997
O’Loughlin, P. Mark & VandenSpiegel, Didier 2010 |
Myriotrochus sp.
O'Loughlin, P. M. & Manjon-Cabeza, M. E. & Ruiz, F. M. 2009: 9 |
Smirnov, A. V. & Bardsley, T. M. 1997: 111 |
O'Loughlin, P. M. & Bardsley, T. M. & O'Hara, T. D. 1994: 553 |