Serrata occidentalis, Boyer, 2008
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publication ID |
978-2-85653-614-8 |
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persistent identifier |
https://treatment.plazi.org/id/03C387B7-FF91-5B67-FE98-A344FE40FDE5 |
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treatment provided by |
Felipe |
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scientific name |
Serrata occidentalis |
| status |
sp. nov. |
Serrata occidentalis View in CoL n. sp.
Figs 13, 14
TYPE MATERIAL. — Holotype (dd) MNHN 20591 View Materials and 2 paratypes (dd) MNHN 20592 View Materials .
TYPE LOCALITY. — Southern New Caledonia, 22°35’S, 166°27’E, 465-525 m [BATHUS 2: stn DW 739] GoogleMaps .
MATERIAL EXAMINED. — Southern New Caledonia. VAU- DW 730, 23°03’S, 166°58’E, 397-400 m, 3 dd; stn DW 739, BAN: stn 40, 22°30’S, 166°24’E, 250-350 m, 6 dd GoogleMaps . — BATHUS 22°35’S, 166°27’E, 465-525 m, 3 dd (holotype, Fig. 13 and 2: stn DW 724, 22°48’S, 167°26’E, 344-358 m, 18 dd; stn paratypes, Fig. 14).
DISTRIBUTION. — Southern New Caledonia, shells in 350-465 m.
DESCRIPTION. — Shell moderately biconical, solid, opaque. Protoconch paucispiral, wide, low, smooth. Spire moderate-sized, conical, whorls weakly convex. Aperture moderately open, regular, very oblique. Base tapering. Outer lip thick, more strongly over upper part, shoulder rounded, anterior half straight, oblique, outer margin thick, protruding, flat, weakly stepped, inner edge straight, bearing 12 prominent denticles that become larger and more widely spaced towards base. Four prominent columellar plaits, 3 anterior ones long, oblique, weakly sinuous, fourth shorter and less oblique.
Ground colour whitish (faded), with orange mark on central part of outer margin.
Dimensions: 4.8 x 2.4 mm.
Radula unknown.
REMARKS. — Specimens attributed to Serrata occidentalis are rather variable. The outline ranges from moderately biconical (Fig. 13) to slightly oval-subpyriform (Fig. 14), the shoulder is more or less protruding, and the inner edge of the outer lip has a somewhat protruding, reflected upper part in some specimens. The number of labial denticles ranges from 12 to 14. Shells from BATHUS 2 stn DW 724 have a more slender outline than the type material, with a narrower spire and a more angular shoulder.
Serrata occidentalis differs from S. ovata in its more pyriform/biconical shell outline, its more promient spire, its more oblique columellar plaits, and its weaker labial denticles.
ETYMOLOGY. — Latin occidentalis (adj., western), referring to the geographical range of the species, to the west of
the New Caledonia Ridge.
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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