Filiscala raricosta
(Lamarck, 1804)
Description:
Dimensions range from 5.4 mm - 25 mm high and 5.98 mm - 7.66 mm wide.
Width to height ratio: 01.11:1 ~ 0.31:1
Shell: pyramidal, pointed; thin; minute to moderately small. Exterior colour white, costae white. About 12 whorls, convex, rounded whorls that bulge outward significantly, with the most prominent outer edge sitting around the middle; protoconch with ~3 whorls ; teleoconch with ~7 whorls. Suture impressed. Umbilicate: narrow, partially obscured by peristome. Approximately 17 - 25 costae on the body whorl. Costae are very fine or obsolete varices, some thick, and curved strong,, varices very few, rounded, crenated, slightly curved above the middle;, threadlike, irregularly spaced, low rounded ribs. There is a single varix on each whorl. The varix is with occasional thicker varices. Costae aligned on earlier whorls, but discontinuous on later whorls; discontinuous across the suture; not peaked; not reflexed. Intercostal spaces fine, evenly spaced radial threads. Interstices with approximately 20 spiral striae per whorl. Base with rounded striae. Aperture oval, ear-shaped, large; peristome thickened and reflected but incomplete; inner lip labium moderately expanded over umbilical opening.
Tryon [1887: 78] notes that Reeve's locality, West Indies, is erroneous.
Distribution:
Indo-West Pacific, India to Gulf of Oman [Ghosh et al, 2016:482]; Cocoss Keeling Islands [Maes, 1967:117]; Singapre [Tan & Woo, 2010:40]; Australia, Queensland south to Keppel Bay: [Wilson, 1990: 279]; Wexmouth , Western Australia [South Australian Museum, 2026: D51462]; Japan, southward from Kii Peninsular [Higo et al.,1999]; Taiwan [Huang & Lee, 2016:19]; Philippines, Mauritius [Tryon, 1887:78].
Habitat:
offshore, 20 [Higo et al., 1999] to 285.3m [Melvill & Standen, 1903a:348]; sandy mud [Higo et al., 1999].
Etymology:
[latin] from rarus = scattered, far apart, seldom, rare or few and costatus = ribbed, in reference to the occasional expanded rib on the shell.
Ghosh, A., Mukhopadhay, A. & Tripathy, B (2016). pp: 482. Fig. 2.
Fig. 2. Filiscala raricosta (Lamarck, 1804)
Distribution
as listed in source literature
Type Material:
The following list brings together type material and other cited specimens as reported in the sources examined, grouped under the names and designations used in each source. The same specimen may appear in multiple entries drawn from different sources. Some entries concern other species included by authors for comparison; inclusion in this list does not imply synonymy.
Filiscala martinii (W. Wood, 1828)Type designation not provided in text/ source documentnone designated. [Higo et al., 1999: 223].
Scalaria striata Kiener, 1838Type not locatedno location given, [Brown & Neville, 2015: 142].
Turbo martinii W. Wood, 1828HolotypeNHM 20100591. [Natural History Museum, 2014: NHM 20100591].NHMUK 20100591. [Coan & Petit, 2011: 39].TypeNHMUK 20100591. no location given, [Brown & Neville, 2015: 102].
Chemnitz, J. H. (1780).
Plate 153. Fig. 1435.
Plate 153. Fig. 1436.
Lamarck [J.B.P.A. de]. (1804).
pp: 213.
All Scalaria are marine shells. Some inhabit the seas of warm climates, while others occur in the seas bordering our oceanic coasts.
Among the species of this genus, one is particularly remarkable for its umbilicus and for the unusual separation of the whorls of its spire. It is highly sought after by collectors and, for this reason, commands a fairly high price in trade, especially when it is of large size and well preserved.
This is Linnaeus's Turbo scalaris, the species to which the name scalata is more especially applied. To this genus should also be referred Turbo principalis Pallas, Turbo clathrus Linnaeus
Lamarck, [J.-B. M.] de. (1822).
Shown in text as Scalaria raricosta.
pp: 228.
Kiener, L. C., & Fischer, P. (1838b).
Shown in text as Scalaria striata Kiener, 1838
Plate V. Fig. 14.
Plate V. Fig. 14.
pp: 20.
Sowerby, G. B. II. (1844).
Shown in text as Scalaria martinii (W. Wood, 1828)
Plate iii. Fig. 20.
Reeve, L.A. (1873).
Shown in text as Scalaria martinii (W. Wood, 1828)
Plate xxxiv. Fig. 78.
pp: 93.
Tryon [1887: 78] notes that Reeve's locality, West Indies, is erroneous.
Tryon, G.W. (1887).
Shown in text as Scalaria martinii Wood, 1828
Plate 16. Fig. 5.
pp: 78.
Clessin, S. (1897).
Shown in text as Scalaria martinii (W. Wood, 1828)
Plate 8. Fig. 9.
pp: 31.
Shell elevated, white, spirally striated; whorls numerous, rounded, contiguous; varices very few, rounded, crenulated, slightly arched above the middle; aperture somewhat auriform.
Melvill, J. C. & Standen, R. (1903a).
Shown in text as Scala (Amaea) martinii (W. Wood, 1828)
pp: 348.
Maes, V. O. (1967).
Shown in text as Epitonium martinii (W. Wood, 1828)
Plate 8. Fig. c.
Epitonium martinji (Wood)
ANSP 287713, 5.4 mm
Coan, E.V. & Petit, R.E. (2011).
Shown in text as Turbo martinii, W. Wood, 1828
pp: 39.
Ghosh, A., Mukhopadhay, A. & Tripathy, B (2016).