« 262. Y. lucida n. — Testa oblonga, tenuis, alba, nitida, modice convexa, antice elliptiico-rotundata, postice producta, subtruncata, fere rectangula, compressa; margo dorsalis leviter convexus, ventralis parum arcuatus; fossa ligamenti minuta, lata, demissa; umbones paullum ante medium siti, parvi, parum prominuli… » – S. L. Lovén: “Index molluscorum litora Scandinaviae occidentalia habitantium”, Öfversigt af Kongliga Vetenskaps Akademiens Förhandlingar”, Stockholm 1846, p.188.
Above and below: 130m deep, Sveti Andrija Island (Svetac), 14 miles west of Vis island, Split-Dalmatia Comitat, S. Croatia. 4,1mm. Original pictures provided by R. Stanić (HR).
– (CC BY-NC-SA) –
« …dentes antici 11, postici 12, validi, curvi… » – Op. cit. p.189.
« Shell transversely oblong-oval, nearly equilateral, somewhat depressed, rather thin, glossy, semitransparent. Sculpture none except a few irregular periodical lines of growth. Colour whitish. Epidermis yellowish-white. Margins obtuse-angled and pinched up at the back, equally rounded at each end, slightly produced or extended on the anterior side, gently curved in front. Beaks almost central, prominent, rather gibbous, and incurved. Lunule wanting, in consequence of the pouting and sharp margin at the back. Cartilage and pit very minute, the latter sunken. Hinge-line obtuse-angled. Hinge-plate rather narrow, but strong. Teeth small, erect and comb-like, 8 on each side, besides 4 or 5 minute tubercles near the beak; inside smooth and polished; edge sharp and plain. Scars indistinct. » – J. G. Jeffreys: “On the Mollusca procured during the ‘Lightning’ and ‘Porcupine’ expeditions 1868-1870 (Part II)”, Proceedings of the Zoological Society of London for the year 1879, London 1879, p.579.