Auristomia rutor (Nofroni & Schander, 1994)
S. Portugal to Morocco, Alborán Sea.
Ectoparasit at least in infralittoral.
Original taxon: Odostomia rutor.
 
« Shell subcilindric, semitransparent, with slightly convex whorls and a channelized shallow suture; […] one or two spiral lines made up of quadrangular perforations above the suture (two or three on the periphery of the last whorl); aperture piriform; there is a light columellar fold; protoconch of type B. » – Peñas, Templado & Martínez: “Contribución al conocimiento de los Pyramidelloidea del Mediterráneo español” Iberus 14 (1), 1996, page 50.

On beach, Málaga, Andalucia, S. Spain. 2mm.

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