GASTROPODA | MATHILDIDAE |
Shell small, turritelliform, elongate, with a sculpture chiefly spiral, at most with radials and spirals of almost same strength (Mathilda retusa). Whorls carinate, moderately to strongly convex, with always a marked suture; aperture circular, umbilicus none. |
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Mathilda Semper, 1865:« Shell turriculate; after the rotation of the apex, abruptly dextral; whorls, in typical species, reticulate by transverse beads and logitudinal striae; aperture entire, subcircular; base sometimes large; labrum sharp; labium erect; columella smooth, not folded. » – O. Semper: “Du genre Mathilda”, Journal de Conchyliologie vol.13, Paris 1865, p.330. |
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