Xenophora Fischer von Waldheim 1807

Résumé fourni par la source

Genus Xenophora Fischer von Waldheim, 1807 Type species: Xenophora laevigata Fischer von Waldheim, 1807, by subsequent designation (Harris, 1897: 253). Diagnosis: Shell from medium to large (20 mm to 160 mm), depressed-conical, with narrow and corrugate peripheral flange, separating spire from base. Shell sculpture composed of numerous granulose opisthocline spiral cords. Aperture large, base broad, rather flattened or convex, often umbilicate. Basal sculpture composed by granulose collabral ribs, intersected with spiral ribs. Teleoconch with foreign objects attached in spiral series to peripheral flange. Protoconch multispiral, depressed-conical, smooth. Operculum horny, nucleus lateral, with simple growth lamellae, sometimes with conspicuous radial striae or hollow radial ribs.

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