Spire scalariform; whorls separated by a deep, undulating suture; subsutural ramp adorned with whitish commas (« albo-virgulatae » in Monterosato); sculpture made of few, sharp, raised spiral ridges running upon even fewer radial costae, giving the shell a clathrate appearance. Shallow water, north of the harbour, east of the bridge, along the Avenue des Étangs, Frontignan-plage, Occitania. Original picture provided by J. Renoult for iNaturalist – (CC BY-NC).