"Amalda" crosnieri Kilburn, 1977

"Ovate-biconical, breadth 0,46-0,49 of length; spire sharp, angle 54°-69°, covered by primary callus, with a tongue-shaped secondary callus pad on underside; labrum opisthocline, foreshortened,  without a denticle, extending posteriorly as a ridge as far as suture; no ancillid groove; columella pillar twisted, with 4-7 pleats, outer 2-3 coarse, often bifid; callus deposits microshagreened; white, spire tinged with light orange-yellow; maximum length about 27 mm. Description: Ovate-biconical, breadth 0,46-0,49 of length, body whorl slightly shouldered; spire sharp, angle 54°-69°, slightly cyrtoconic, a little shorter than aperture (aperture 0,55-0,59 of total length). Sutures completely masked by a microshagreened primary callus glaze, exposing only the first protoconch whorl (and sometimes part of the second); overlain by a large, thick tongue-shaped deposit of microshagreened secondary callus, which extends up right side of spire almost to apex, across ventral surface to the left side, over paries to the columella pillar and behind labrum to the base; this callus fills the posterior angle of the aperture, and at the termination of the penultimate whorl forms a thickened ridge-like extension of the labrum. Aperture rather broad, greatest width median, posterior end narrowly rounded; labrum fairly thick, opisthocline, without a basal denticle, foreshortened, termination slightly above columella base, siphonal notch deep. Columella pillar twisted, termination acute, sharply curved, basal notch deep; microshagreened, with 4-7 oblique pleats, often bifid, outer 2-3 coarse, inner ones fine. Anterior fasciolar groove shallow, anterior fasciolar band convex; posterior fasciolar band crossed by a blunt ridge, with the adjacent surface concave; no distinct ancillid band or groove. Median zone of body whorl smooth, save for growth lines, which become rather coarse towards back of labrum. Colour yellowish-white, spire and subsutural region of body whorl and posterior half of fasciolar band tinged with light orange-yellow; aperture, columella and most of secondary callus white. Protoconch conical, limits not clear, about two whorls, basal diameter about 1,5 mm. Teleoconch whorls about three. Dimensions: 23,2 x 10,5  mm (holotype);  26,8 x 12,9  mm, 20,4 x9,4  mm (paratypes).". Recent. Off Nosy Bé, NW Malagasy Republic.