Kuroshioturris putere

General description: 

Shell small (H 14 mm), tall and moderately slender, with tall spire and relatively short last whorl (siphonal canal apex and outer lip slightly incomplete). Protoconch low, rounded, smooth, mammillate, of little more than 1.5 whorls, with a large, subspherical initiation, apparently as in Kuroshioturris angustata, but somewhat abraded on all specimens. Teleoconch of ca 6.5 whorls, spire relatively wide, rendered prominently gradate by strongly protruding peripheral keel at base of sutural ramp, keel just above suture on most spire whorls; suture descending on last whorl on some specimens, raising position of keel to mid-whorl height on paratype TM8673; base weakly convex below keel, tapering evenly and strongly into weakly concave neck and moderately long, gently tapered, incomplete but apparently unnotched anterior canal. Sutural ramp moderately wide, upper two-thirds steeply sloping, almost flat; lower third deeply concave, curving out to form protruding peripheral keel. Sculpture visually dominated by one peripheral row of prominent, narrow, sharply pointed, triangular nodules formed by apex of trace of posterior sinus, otherwise predominantly of fine spiral cords; 20 nodules on last whorl and 19 on penultimate whorl of holotype, 23 on last whorl and 22 on penultimate whorl of paratype TM8673. Spiral sculpture commencing on first teleoconch whorl as one prominent subsutural row of moderately large triangular nodules and one prominent peripheral row of larger triangular nodules, together occupying most of whorl surface, all weakening down spire; subsutural row gradually weakens to form 2–3 moderately prominent spiral cords (the lowest finely nodulose) over mid-spire, then weakens further to form wide zone of 3–4 low, narrow, closely spaced spiral cords slightly elevated above rest of ramp, with scarcely any nodules, on last two whorls of holotype, fading out altogether on some paratypes; 4–5 fine, closely spaced spiral threads develop on upper part of wide, strongly concave sutural ramp, lower third almost smooth; three very narrow, closely spaced spiral cords develop around peripheral nodule row on last 2–3 teleoconch whorls, uppermost very faint, central most prominent; two prominent, narrow spiral cords on upper part of base, upper cord margining suture and lower appearing from suture on holotype, upper cord appearing from suture on some paratypes; 1–3 lower, narrower, closely spaced, very fine spiral threads above and between two prominent cords on base, 12–15 further fine threads below, fading out over siphonal canal. Axial sculpture of growth lines only, apart from peripheral nodules. Aperture unthickened, without parietal callus, inner lip slightly excavated into previous whorl; outer lip thin and simple, without stromboid notch; profile of outer edge of outer lip biarcuate, moderately convex over sutural ramp, forming narrowly rounded posterior sinus at peripheral nodule row, curving forwards again moderately below ramp.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith