Gemmula (Gemmula) congener ( E. A. Smith, 1894 )

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 : 3-5

Gemmula (Gemmula) congener ( E. A. Smith, 1894)

(Pl. 1, fig. 1)

Pleurotoma congener E. A. Smith, 1894: 160 , pl. 3, figs. 4, 5.

Pleurotoma (Gemmula) congener .— Schepman 1913: 403.

Turris (Gemmula) congener . — Melvill 1917: 144.

Gemmula congener congener . — Powell 1964: 251, pl. 191, figs. 1–4. Gemmula (Gemmula) congener . — Cernohorsky 1987: 123, figs. 1–4 (not fig.5).

Material examined. ECS. 1 spm, RN MBM028715, CN F13B-16, 30 º00´N, 124º00´E, 63 m, AT, 24. X. 1959. Beibu Gulf. 1 spm, CN R124B-70, 20 º45´N, 108º00´E, silt, 39 m, AT, coll. B. Zhang & W. Yuan, 14. XII. 1959; 1 spm, CN Q136-23, 20 º15´N, 107º00´E, muddy sand, 31 m, AT, coll. F. Sun, 1. II. 1960; 1 spm, CN X72 B-43, 19 º00´N, 106º00´E, muddy sand, 28 m, coll. Fan, 11. II. 1960; 1 spm, CN Z14B-28, 19 º00´N, 108º00´E, fine sandy mud, 73.5 m, 16. V. 1960; 2 spms, CN X23 B-52, 19 º00´N, 106º30´E, sandy mud, 41 m, AT, 8. XII. 1959; 1 spm, CN Q247B-4, 20 º45´N, 107º30´E, silt, 31 m, AT, 16. VII. 1960; 1 spm, CN R107-57, 20 º00´N, 107º00´E, muddy fine sand, 36 m, AT, 5. XII, 1959; 1 spm, CN X63 B27, 19 º30´N, 108º30´E, fine sandy silt, 55.5 m, AT, 9. II. 1960. SCS. 2 spms, CN K118B-34, 20 º30´N, 112º00´E, sandy mud, 72 m, 6. II. 1960; 1 spm, CN S187B-11, 21 º30´N, 115º00´E, sandy mud, 86.6, AT, 9. I. 1960; 1 spm, CN N143B-16, 17 º30´N, 110º00´E, sandy mud, 140 m, AT, 10. III. 1960. Nansha Islands. 8 spms, CN SSIVB 49-8, 5 º15´N, 108º45´E, muddy sand, 111 m, AT, 16. V. 1987; 1 spm, CN SSIV 45-21, 4 º00´N, 110º00´E, muddy sand, 99 m, AT, 15. V. 1987; 1 spm, CN SSVIIIB10-15, 8 º52´N, 108º40´E, sand, 94 m, 10. VI. 1990; 1 spm, CN SSVIII8- 16, 7 º24´N, 104º52´E, muddy sand, 44 m, AT, 9. VI. 1990; 1 spm, CN SSB-2, 5 º30´N, 112º00´E, 142 m, 23. IX. 1994; 1 spm, CN SSB9-2, 4 º30´N, 109º30´E, 108 m, 23. IX. 1994.

PLATE 1. Species of Subfamily Turrinae , fig. 1. Gemmula (Gemmula) congener (CN X72 B-43); 2-3. G. (Gemmula) cosmoi (CN K164B-28-1); 4. G. (Gemmula) kieneri (CN SSBII 15-9-1); 5-6. G. flata sp. nov. (holotype, CN 7-20); 7. Lophiotoma hastula (CN S148-B18-1); 8. Lophiotoma ina (CN 59-1-26); 9. Lophiotoma koolhoveni (CN X84 B-31).

Measurements (mm).

Distribution. East China Sea, Beibu Gulf, northern South China Sea and Nansha Islands; Japan.

Remarks. The present specimens agree well with the figure reported by Cernohorsky (1987: 123, fig. 4). Cernohorsky (1987) suggested that the development of the bicarinate subsutural cord is variable in Gemmula congener ( E. A. Smith, 1894) , and that G. r a r i m a c u l a t a Kuroda & Oyama 1971 is a synonym. We do not agree with Cernohorsky (1987) because G. congener has distinctly broader shell than G. rarimaculata , and the details of shell sculpture of the two species is different.

Powell (1964) reported three recent subspecies of Gemmula congener : G. c. cosmoi ( Sykes, 1930) , G. c. diomedea Powell, 1964 , and type subspecies G. c. congener ( E. A. Smith, 1894) . They were evaluated as separated species more recently by Cernohorsky (1987) and Kilburn (1983).