Gemmula (Gemmula) congener E. A. Smith 1894
Creators: name: Li, Baoquan
name: Li, Xinzheng
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neogastropoda
Turridae
Gemmula
Gemmula congener

description: 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).
description: Published as part of Li, Baoquan & Li, Xinzheng, 2008, Report on the turrid genera Gemmula, Lophiotoma and Ptychosyrinx (Gastropoda: Turridae: Turrinae) from the China seas, pp. 1-25 in Zootaxa 1778 on pages 3-5, DOI: 10.5281/zenodo.274298