Clavus pica (Reeve, 1843)

Kilburn, Richard N., Fedosov, Alexander & Kantor, Yuri, 2014, The shallow-water New Caledonia Drilliidae of genus Clavus Montfort, 1810 (Mollusca: Gastropoda: Conoidea), Zootaxa 3818 (1), pp. 1-69 : 40

Clavus pica (Reeve, 1843)

( Figs. 19 C, D)

Pleurotoma pica Reeve 1843 : pl. 8, sp. 61.

Other references.

Pleurotoma (Crassispira) pica ; Weinkauff 1876: 93, pl. 20, fig. 2. Higo et al. 2001: 100, G34508 (syntype). Drillia (Clavus) pica ; Boettger 1895: 8.

Tylotiella pica ; Powell 1966: 72; Wells 1991: 30, pl. 6, figs. 7–8 (syntype); Sysoev in Poppe 2008: pl. 675, figs. 17–18. Clavus pica ; Cernohorsky 1978: 152, pl. 54, fig. 9.

NOT Clavus (Tylotia) pica ; Hasegawa et al. 2000: 621, pl. 309, fig. 13 [= C. formosus ].

Type data. Three syntypes NHMUK 1963875. Type loc.: Capul Island, Philippines.

New caledonian material examined. Nouméa: LAGON Stn. 1354 (1 spm).

Distribution. Philippines and New Caledonia to Christmas Is. and Mauritius, shallow water to about 30 m.

Description. Shell, thick, claviform, with orthoconoid spire of (breadth/length 0.42, aperture/total length 0.37), with relatively wide aperture and broad, truncate, indented base. Teleoconch of 6.5–7 whorls. Spire whorls concave at subsutural regions, and convex below adapical third. Suture shallow, adpressed to previous whorl. Axial sculpture of wide rounded opisthocline suture-to-suture folds (18–20 on last adult whorl), strong on peripheries and weaker in concavities of subsutural areas. Microsculpture of dense somewhat rugose spiral threads and coarser collabral ones.

Outer lip convex in side view, anal sinus U-shaped, rather deep, stromboid notch distinct. Varix rounded, situated a short distance behind lip. Siphonal canal with 6–8 close-set, wide and rounded spiral ridges. Opening of siphonal canal wide and distinctly indented.

Background colour cream with intricate tile-like pattern of brown lines on peripheries of spire whorls and entire last adult whorl. Subsutural regions of teleoconch with irregular brown blotches.

Protoconch (based in dead collected specimen from Philippines) high papilliform, of ca three smooth and glossy whorls, clear-cut protoconch-teleoconch transition. Diameter ca 710 µm, height 620 µm

Measurments. The only New Caledonian specimen has SL 20.9 mm, Philippine specimens attain 23 mm.

Radula. Not available.

Remarks. This widely distributed species appears to be rare in New Caledonia, as only one specimen is present in the MNHN samples. See under the following species for comments.

Figures

FIGURE 19. Clavus moquiniana (Montrouzier in Souverbie & Montrouzier, 1874) and Clavus pica (Reeve, 1845). A, B. Holotype of Pleurotoma moquiniana Montrouzier in Souverbie & Montrouzier, 1874, MHNBx 2004. TY. 30, New Caledonia, Art Is, SL 12.2 mm, SW 4.5 mm; C, D. Clavus pica, LAGON, Stn. 1354, SL 20.9 mm.