* Kermia cavernosa (Reeve, 1845)

(Figure 3C)

Pleurotoma cavernosa Reeve, 1845, pl. 33, sp. 303. Type loc.: Philippine Is. Clathurella cavernosa – Tryon, 1884, p 290, pl. 17, fig. 10; pl. 19, fig. 69.

Clathurina cavernosa – Melvill, 1917, p. 186.

Kermia cavernosa – Kilburn, 2009, p. 227, figs. 25, 26.

Material examined

Yellow Sea. 2 specs, Zhucha Island (Qingdao, Shandong).

Five syntypes, NHMUK 1963801, Philippines; 5.9 × 2.5 mm, one retaining protoconch photographed.

Description

Whorls slightly flattened at periphery. Aperture oblong-ovate, inner lip evenly curved; outer lip weakly curved in side-view, anal sinus openly U-shaped, stromboid notch distinct, lip with up to six short ridges internally, becoming weak anteriorly; terminal varix narrow, raised, short distance behind lip.

Sculpture cancellate, with spiral cords forming sharp nodules where they cross axial ribs; base of last whorl with distinct waist. Axial ribs extending from suture to rostrum, in transect rounded, sides gently sloping, more or less equal in width to intervals; nine ribs on first teleoconch whorl, 11–13 on penultimate one. Spiral ridges sharp, much narrower than intervals, expanded slightly where cross ribs; two to three on early whorls, four to five on penultimate whorl, base of last whorl with one ridge, separated by gap from four to five nodular cords on rostrum; outer edge of lip with seven cords. Interstices with faint to microscopic collabral threads. Protoconch conical, of about three convex whorls, diagonally cancellate. Uniform yellowish-brown with paler nodules. Dimensions: 5.9 × 2.5 mm (syntype P.cavernosa).

Distribution

Qingdao (Shandong Province); Philippines. Not previously recorded from China Seas.