Type locality: Walters Shoal seamount
Description Shell small, robust, broadly-fusiform (W/H 0.44, A/H 0.5), with stout, tapering siphonal canal. Protoconch not known. Teleoconch of ca. 5 whorls; suture impressed. Whorl profile evenly convex, with very fine but distinct, subsutural cord bordering adapical suture on 1-3 whorls. Sculpture of broad, rounded axial ribs, commencing at adapical third of whorls, and reaching abapical suture; 9 ribs on last and penultimate whorls. Spiral sculpture of faint, widely set, grooves on periphery of last whorl. Shell base demarcated from stout, tapering siphonal canal by distinct excavation; siphonal canal with low, broad, rounded, oblique cords. Aperture rather wide; parietal comer with thickened callus, but without distinct tubercle or pad. Outer lip nearly straight-sided in its adapical portion, lacking liration on its inner surface. Four thin columellar folds, adapicalmost strongest, succeeding ones gradually reduced in size. Background color tan, ribs white, bearing a fine spiral brown line at whorl mid-height; a second brown line across ribs on shell base. Inside of aperture yellowish. Anatomy notes (holotype): Osphradium very large. Eye tentacles rather short, eye located at their base laterally. Gland of Leiblein well developed, light brown; lying dorsally, its anterior part merged with short and thick, semi-translucent, secondary secretory gland, opening in mid-oesophagus. Valve of Leiblein distinct, globular, salivary gland moderately developed. Proboscis short and thin, rachula sack and buccal mass located entirely outside proboscis and its base. Radula (holotype) of 28+ transversal rows of teeth. Rachidian broad, multicuspidate, its base excavated, whereas posterior margin slightly convex, bearing 11 pointed cusps, outermost two notably smaller than 9 median cusps. Laterals with single long cusp notably bent at its tip. Etymology The species epithet sola [=lonely, Latin] refers to the fact that the holotype of this new species was the only costellariid specimen sampled during the Walters Shoal cruise.Distribution Known only from type locality. Remarks K. sola sp. nov. is perhaps closest to K. maculosa, a putatively related species from South Africa . K sola, however, can be differentiated by its stronger, wider, and more prominent ribs, as well, as the deeper excavation at transition of shell base to the siphonal canal, and the presence of one fine brown spiral line on spire whorls, and two lines on the last whorl. K sola sp. nov. can be differentiated from yet another somewhat similar species, K. aikeni , by having a more robust build, proportionally lower spire, and less evenly convex whorls.