Turrancilla reboriae (Poppe, Tagaro & Goto, 2018)

Turrancilla reboriae (Poppe, Tagaro & Goto, 2018)

Figs 4C–D View FIGURE 4 , 6A–F View FIGURE 6 , 7A View FIGURE 7

Turrancilla sp. 2 — Kantor et al. 2017: figs. 6T (shell), 12H (radula).

Ancilla reboriae Poppe, Tagaro & Goto 2018: 102–103 View in CoL , pl. 8, figs 1–3.

Type material. Holotype: presently in Conchology, Inc., will be donated to a Philippine Institution (Poppe et al. 2017).

Type locality. Philippines, Mactan I., Punta Engaño, 250–300 m.

Sequenced material. PHILIPPINES • 2 lv; Bohol Sea, off Balicasag I., 9°29'N, 123°44'E, 271–318 m, PANGLAO 2005, stn CP2340 (MNHN-IM-2007-35726, MNHN-IM-2007-35727) GoogleMaps • 1 lv; Bohol Sea , off Pamilacan I., 9°25'N, 123°50'E, 544–712 m, PANGLAO 2005, stn CP2341 (MNHN-IM-2007-31947) GoogleMaps • 1 lv; Bohol / Sulu Sea sill, 8°49'N, 123°38'E, PANGLAO 2005, stn CP2360 (MNHN-IM-2007-31954) GoogleMaps • 2 lv; Bohol Sea, Maribojoc Bay , 9°39'N, 123°43'E, 481–505 m, PANGLAO 2005, stn CP2404 (MNHN-IM-2007-31952, MNHN-IM-2007-31953) GoogleMaps .

Non sequenced material. PHILIPPINES • 6 dd; Bohol Sea, off Balicasag I., 9°29'N, 123°44'E, 271–318 m, PANGLAO 2005, stn CP2340 GoogleMaps • 3 dd; Bohol Sea, Maribojoc Bay ; 9°35'N, 123°42'E; depth 642–669 m; PANGLAO 2005, stn CP2397. GoogleMaps

Description. Shell of small size for the genus (up to 15 mm), ovate. Protoconch low dome shaped, smooth, light yellowish-brown. First whorl with distinct impressed suture, further whorls’ suture overlaid by callus. Protoconch borders indistinct, rendering whorl count impossible. Spire low, conical; primary callus moderately thick and covering all whorls except protoconch, slightly impressed at sutures; especially on penultimate whorl, surface of callus glossy, distinctly microshagreened; secondary callus thin, extending to right-ventral side of last whorl and continuing up as fairly thin, tongue-shaped pad, reaching suture of antepenultimate whorl. Surface of secondary callus very similar to that of primary one, borders indistinct. Body whorl cloak glossy, covered by very weak and indistinct thin spiral striation. Olivoid groove very shallow but distinct, terminating in very short and narrow rounded extension on outer lip. Olivoid band usually slightly lighter than cloak. Rear edge of anterior band rather distinct, in a shape of sharp step. Anterior band darker than cloak, brown, microshagreened, separated into upper and about three times narrower lower band by low but distinct ridge. Both upper and lower parts of anterior band weakly convex. Plication plate well separated by broad and deep groove, with well pronounced 4 spiral ridges progressively weakening abapically. Columella smooth. Aperture narrow oval, acute posteriorly; outer lip slightly thickened, slightly opisthocline, with slight, blunt labral denticle; siphonal notch moderately deep, asymmetrical. Shell of different shades of brown, with a light broad band in suture area. Plication plate from creamy to light purplish.

Radula ( Fig. 4C–D View FIGURE 4 ) studied in one specimen (MNHN-IM-2007-31947, SL 9.9 mm), typical for the genus. Radula membrane narrow, about 40 µm in width (0.7% of AL).

Diagnostic cox-1 sites. 'C' in the site 64, 'C' in the site 70.

Remarks. This very distinct small species (reaching 14.3 mm in SL) has some similarity to the species of Ancilla and was originally described in this genus. Nevertheless, the radula and molecular data undoubtedly place it in Turrancilla .

Distribution. Philippines ( Fig. 7A View FIGURE 7 ).