Lophiotoma koolhoveni ( Oostingh, 1938 ) Oostingh, 1938

Li, Baoquan & Li, Xinzheng, 2008, Report on the turrid genera Gemmula, Lophiotoma and Ptychosyrinx (Gastropoda: Turridae: Turrinae) from the China seas, Zootaxa 1778, pp. 1-25 : 17-19

Lophiotoma koolhoveni ( Oostingh, 1938) , n. comb.

(Pl. 1, fig. 9)

Turris (Gemmula) koolhoveni Oostingh, 1938: 28 , pl. 1, fig. 22.

Gemmula (Unedogemmula) koolhoveni .— Powell, 1964: 274, pl. 210, fig. 4.

Material examined. Bohai Gulf. 1 spm, CN H226B-5, 40 °05’N, 121°38’E, sandy mud, 23.5 m, 18. VII. 1959. Beibu Gulf. 1 spm, CN X38 B-85, 18 °30’N, 108°30’E, 28.5 m, 11. XI. 1959; 1 spm, CN Q239-6, 20 °15’N, 109°30’E, 24.5 m, AT, 14. VII. 1960; 1 spm, CN Q293B-50, 20 °45’N, 107°30’E, muddy sand, 31 m, 11. XI. 1960; 1 spm, CN Q123-17, 20 °04’N, 109°30’E, 62 m, 7. II. 1960; 1 spm, CN X84 B-31, 18 °45’N, 108°30’E, coarse sand, 24 m, AT, 13. II. 1960; 1 spm, Q123-17, 20 °04’N, 109°30’E, 62 m, 7. II. 1960. SCS. 1 spm, CN S161-13-17, 20 °00’N, 116°00’E, fine sand, 85 m, 23. XI. 1959; 1 spm, CN S161-B17, 22 °00’N, 116°00’E, fine sand, 85 m, AT, 23. IX. 1959; 1 spm, CN K167B-122, 21 °15’N, 114°00’E, coarse sand, 51 m, AT, 9. IV. 1960. (Shells of specimens from Beibu Gulf and SCS all broken).

Measurements (mm).

PLATE 4. Species of Subfamily Turrinae , figs. 1-2. Gemmula (Gemmula) cf. diomedea (CN N169B-19); 3-4. Gemmula dampierana (CN N181B-59); 5. Gemmula gilchristi (CN F14B); 6-7. Gemmula cf. gemmulina (CN Q101B).

Diagnosis. Shell of medium size, 17.8–42.5 mm in height; with gemmules only on upper spire whorls and regular, spaced spiral cords. Color grayish white.

Distribution. Bohai Gulf, Beibu Gulf, South China Sea; Java: South Bantam (Pliocene).

Remarks. The specimens agree well with the previous descriptions and illustrations. This species is easily recognized by the gemmules only on the upper whorls and the regular sharp, dense spiral cords. Taylor et al. (1993) took the genus Unedogemmula as a synonym of Lophiotoma . We followed their suggestion here and transfer this species from the genus Gemmula into the genus Lophiotoma as a new combination.