taxonID	type	description	language	source
F08A4E965C425139B69E05E0542903D1.taxon	type_taxon	Type species. Trochus maculatus Linnaeus, 1758; Recent, Indo-Pacific region.	en	Zhu, Peng-Jin, Yan, Cheng-Rui, Yang, Hong-Qiang, Hu, Li-Sha, Dong, Yun-Wei (2025): Description of two new species of the genus Trochus Linnaeus, 1758 (Gastropoda, Trochidae) from the South China Sea. ZooKeys 1264: 265-280, DOI: 10.3897/zookeys.1264.167854
178CD295891C50CA99B0484F44A39B6F.taxon	etymology	Etymology. The name “ nanhai ” is derived from the Chinese designation for the South China Sea, the only region where this species has been documented to date.	en	Zhu, Peng-Jin, Yan, Cheng-Rui, Yang, Hong-Qiang, Hu, Li-Sha, Dong, Yun-Wei (2025): Description of two new species of the genus Trochus Linnaeus, 1758 (Gastropoda, Trochidae) from the South China Sea. ZooKeys 1264: 265-280, DOI: 10.3897/zookeys.1264.167854
178CD295891C50CA99B0484F44A39B6F.taxon	description	Description. Shell: medium size, elate-conic and low-conic, solid and heavy, and falsely umbilicate. Spire composed of 7 – 8 planulate whorls, with 4 – 5 regular closely spaced spiral rows of uniform granules on each whorl (Fig. 4 A – K). These granules are rounded, bead-like, or slightly compressed. Each whorl periphery bears prominent, evenly spaced pustules; these may be inconspicuous in small subadults (Fig. 4 L). In elate-conic specimens, the whorl pustules gradually fuse during growth, resulting in smoother and more continuous beaded spiral ridges (Fig. 4 A – E). The periphery of the body whorl exhibits 12 – 15 distinct longitudinal folds forming oblong nodules. The base of the shell is a little concave, sculptured with 11 – 12 concentric granulose lirae (Fig. 4 F, I). The upper surface bears distinct, broad reddish-brown longitudinal stripes, approximately equal in width to the alternating whitish bands. The base bears a narrow row of spots corresponding to the outer colour pattern. The inner lip is thickened with 3 – 4 folds. The columella bears 4 – 5 plicate dentates (Fig. 4 A, E, F, I, J). Internally, the shell displays a pearly luster accompanied by distinct spiral lirae. Radula. Radula rhipidoglossate, radular formula n × 5 × 1 × 5 × n (Fig. 6 A). The central tooth with U-shaped cusp, broad triangular shaft, symmetrically flanked by eight denticles (Fig. 6 B). Five lateral teeth are present on each side, each with a fold on the shaft that tightly interlocks with the shaft of the adjacent tooth, and bears 3 – 5 denticles on one side only. The fifth lateral tooth bears a distinct paddle-shaped cusp. Marginal teeth are narrow and sickle-shaped; the innermost 10 – 11 marginal teeth each bear 2 – 3 denticles (Fig. 6 C). From the 11 th to 12 th marginal teeth onwards, tooth size gradually decreases, while the number of denticles increases, forming comb or feather-like structures (Fig. 6 D).	en	Zhu, Peng-Jin, Yan, Cheng-Rui, Yang, Hong-Qiang, Hu, Li-Sha, Dong, Yun-Wei (2025): Description of two new species of the genus Trochus Linnaeus, 1758 (Gastropoda, Trochidae) from the South China Sea. ZooKeys 1264: 265-280, DOI: 10.3897/zookeys.1264.167854
178CD295891C50CA99B0484F44A39B6F.taxon	description	Measurements. Shell height 12.9 – 27.8 mm, shell width 14.0 – 24.9 mm, ellipticity 1.56 E + 08 – 4.45 E + 10, Normalized Avg Curvature 0.055 – 0.46, sphericity 0.69 – 0.79, (N = 17). (Details are shown in Suppl. material 1: table S 3).	en	Zhu, Peng-Jin, Yan, Cheng-Rui, Yang, Hong-Qiang, Hu, Li-Sha, Dong, Yun-Wei (2025): Description of two new species of the genus Trochus Linnaeus, 1758 (Gastropoda, Trochidae) from the South China Sea. ZooKeys 1264: 265-280, DOI: 10.3897/zookeys.1264.167854
03F4DC9CAE6E5DA5AB52C58DAE6E6757.taxon	etymology	Etymology. The specific epithet “ parvus ” is derived from the Latin, meaning “ small ”, and refers to the relatively diminutive shell size of the new species, which is a remarkable difference from other species in this genus.	en	Zhu, Peng-Jin, Yan, Cheng-Rui, Yang, Hong-Qiang, Hu, Li-Sha, Dong, Yun-Wei (2025): Description of two new species of the genus Trochus Linnaeus, 1758 (Gastropoda, Trochidae) from the South China Sea. ZooKeys 1264: 265-280, DOI: 10.3897/zookeys.1264.167854
03F4DC9CAE6E5DA5AB52C58DAE6E6757.taxon	description	Description. Shell: Small in size, conical, with an acute apex. The shell surface bears prominent reddish-brown longitudinal stripes that taper into spots toward the base; the apex is typically red. Composed of 6 planulate whorls, with 3 – 4 spiral rows of closely arranged granules (Fig. 5 A – D, F – H). These granules are rounded, bead-like, or slightly compressed, and the upper whorls are smaller than those on the lower whorls. The periphery of the whorls bears a spiral ridge composed of prominent, evenly spaced pustules. The body whorl is sculptured with compact, nearly quadrate, flattened beads, forming a rounded profile. The base is slightly concave, with 7 – 8 concentric granulose lirae, separated by interstices as wide as the ridges (Fig. 5 E). The columella is oblique, bearing 3 – 4 closely packed plicate-dentate, forming a false umbilicus. The inner lip contains 4 folds (Fig. 5 A, E, F). The inner shell surface is nacreous with fine spiral lirae. Radula. Radula rhipidoglossate, radular formula n × 5 × 1 × 5 × n (Fig. 6 E). Central tooth with V-shaped cusp, broad trapezoid shaft, symmetrically flanked by eight denticles (Fig. 6 F). Five lateral teeth are present on each side, each with a fold on the shaft that tightly interlocks with the shaft of the adjacent tooth, bears 3 – 5 denticles on one side only. The fifth lateral tooth bears a distinct paddle-shaped cusp. Marginal teeth are narrow and sickle-shaped; innermost 9 – 12 marginal teeth each bear 2 – 3 denticles (Fig. 6 G). From the 10 th to 13 th marginal teeth onwards, tooth size gradually decreases, while the number of denticles increases, forming a comb (Fig. 6 H) or feather-like structures (Fig. 6 I).	en	Zhu, Peng-Jin, Yan, Cheng-Rui, Yang, Hong-Qiang, Hu, Li-Sha, Dong, Yun-Wei (2025): Description of two new species of the genus Trochus Linnaeus, 1758 (Gastropoda, Trochidae) from the South China Sea. ZooKeys 1264: 265-280, DOI: 10.3897/zookeys.1264.167854
03F4DC9CAE6E5DA5AB52C58DAE6E6757.taxon	description	Measurements. Shell height 11.0 – 13.0 mm, shell width 10.4 – 14.0 mm, ellipticity 1.77 E + 08 – 1.88 E + 08, Normalized Avg Curvature 0.087 – 0.19, sphericity 0.72 – 0.80, (N = 2). Details in Suppl. material 1: table S 3.	en	Zhu, Peng-Jin, Yan, Cheng-Rui, Yang, Hong-Qiang, Hu, Li-Sha, Dong, Yun-Wei (2025): Description of two new species of the genus Trochus Linnaeus, 1758 (Gastropoda, Trochidae) from the South China Sea. ZooKeys 1264: 265-280, DOI: 10.3897/zookeys.1264.167854
