Original taxon: Eulima unifasciata. Synonyms: cincta, crassa…
« Shell turriform, smooth, glossy, white, girded with a fawn-coloured band; whorls 11, almost flat; aperture ovate. » – E. Forbes: “Report on the Mollusca and Radiata of the Aegean sea, and on their distribution, considered as bearing on geology”, Reports of the British Association for the Advancement of Science for 1843, London 1843, p.188.
200m deep, in sediments, off Dubrovnik, S. Croatia. 5,2mm. Original pictures provided by R. Stanić (HR).
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« Shell cylindrical, remarkably thick and strong, opaque, and glossy. Sculpture none, except microscopic lines of growth and the grooves with the outer lip hereafter mentioned, as well as the periphery being slightly angulated. Colour ivory-white. Spire long and finely tapering. Whorls 5 only in the fragments now described, although there would be from 8 to 10 in perfect specimens; they gradually increase in size and are flattened. Suture slight, rounded below. Outer lip incrassated, furnished inside with 8 to 10 spiral striae or flutings, like those in O. candidea, O. tenuis, and O. conspicua, as also in O. costaria and other Crag species. Inner lip forming an unusually thick and broad glaze on the pillar. Umnbilicus none. Tooth large, solid, prominent, and winding round the pillar. » – J. G. Jeffreys: “On the Mollusca procured during the ‘Lightning’ and ‘Porcupine’ expeditions, 1868-70. (Part VIII)”, Proceedings of the Zoological Society of London for the year 1884 part III, London 1884, p.350 for Odostromia crassa. The species unifasciata is redescribed p.351, with its « conspicuous band » and the « grooved or crenated mouth ».
Same spot. 7,1mm.
Original pictures provided by R. Stanić.
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7: Odostomia crassa - 8: Odostomia unifasciata.
The crassa is only a worn and subfossil unifasciata.