Turris undosa ( Lamarck, 1816 )

Li, Baoquan & Li, Xinzheng, 2007, An account of the Genus Turris species (Mollusca: Gastropoda: Turridae) from the East and South China Seas, Zootaxa 1397, pp. 63-68 : 67

5. Turris undosa ( Lamarck, 1816) (pl. 1, fig. 6)

Pleurotoma undosa Lamarck, 1816: 8 , pl. 439, fig. 5.

Pleurotoma undosa Lamarck, Kiener, 1839 –40: 13, pl. 3, fig. 2; Reeve, 1843: pl. 3, sp. 18; Tryon, 1884: 166, pl. 3, fig. 21.

Turris undosa (Lamarck) , Vera­Pelez J.L., et al, 2000: pl. 4, figs. 4–6.

Turris nadaensis (Azuma) , Olivera, 1999: 309, pl. 1, sp. 11, the “Angular” form.

Material examined (1). 4 spms, MBM300235 , SCS, 108º 30´E, 18º 15´N, CN N219 B­ 60, 54 m, May. 16, 1960, coarse sand and shell debris, collector Jixing Liu; (2) . 1 spm, MBM208551 , Beibu Gulf, 108º 00´E, 19º 30´N, CN X15 B­ 61, 60 m, Dec. 6, 1959, muddy sand, collector Xiutong Ma.

Diagnosis Shell medium­sized, 44.2–69.2 mm in height, spire whorls sharply angulate, subsutural fold weak, sinus rib prominent and above the peripheral carina. Shell ornamented with yellowish­brown axial streaks.

Habitat Deep water species, coarse sand and muddy sand sediment.

Range Beibu Gulf; Japan, Philippines.

Remarks This species is closely similar to T. nadaensis , and often confused in some published papers. Our specimens are very similar to the angular form of Olivera (1999), which was tentatively assigned to T. nadaensis , but he mentioned that the angular form is different from both T. nadaensis and T. undosa . Olivera (1999) also suggested the angular form need more specimens to determine its systematic position. Vera­Pelez J.L., et al (2000) provided three clear figures of T. undosa (pl. 4, figs. 4–6) collected from Philippines that are identical to our specimens, so we identified our specimens as T. undosa .