taxonID	type	description	language	source
E72D87E2FFCFFFFCFF5EFED4FE4D7FD6.taxon	materials_examined	Type species: Chiton cinereus Montagu, 1803 (non Linnaeus, 1767) [= Chiton asellus Gmelin, 1791, fide Lovén, 1846], by subsequent designation (Gray, 1847).	en	Park, Jina, Park, Yukyung Kim and Joong-Ki (2025): Taxonomic reassessment of the Korean Leptochiton rugatus (P. P. Carpenter, 1892) (Leptochitonidae: Polyplacophora). Journal of Species Research 14 (1): 96-105, DOI: 10.12651/JSR.2025.14.1.096
E72D87E2FFCFFFFCFF5EFED4FE4D7FD6.taxon	diagnosis	Diagnosis. Body small; valves thin with hardly raised lateral areas; tegmentum generally pale with finely gran- ulose; mucro subcentral; no insertion plates; girdle with small scales, sometimes interspersed with spicules or entirely spiculose; major lateral radula teeth with uni-, bi-, or tricuspid cap, the denticle (s) always pointed. Genus distribution. Worldwide. Triassic to Recent (Laghi, 2005; Sigwart, 2017).	en	Park, Jina, Park, Yukyung Kim and Joong-Ki (2025): Taxonomic reassessment of the Korean Leptochiton rugatus (P. P. Carpenter, 1892) (Leptochitonidae: Polyplacophora). Journal of Species Research 14 (1): 96-105, DOI: 10.12651/JSR.2025.14.1.096
E72D87E2FFCFFFFAFF68FD38FD667AD2.taxon	description	(Figs. 1 - 4) 아 " 군부 (* 명승계)	en	Park, Jina, Park, Yukyung Kim and Joong-Ki (2025): Taxonomic reassessment of the Korean Leptochiton rugatus (P. P. Carpenter, 1892) (Leptochitonidae: Polyplacophora). Journal of Species Research 14 (1): 96-105, DOI: 10.12651/JSR.2025.14.1.096
E72D87E2FFCFFFFAFF68FD38FD667AD2.taxon	materials_examined	Material examined. Korea: total 14 individuals: 4 individuals: Munamjin-ri, Jugwang-myeon, Goseong-gun, Gangwon-do (38 ° 18 ʹ 04.4 ʺ N, 128 ° 34 ʹ 10.8 ʺ E), collected by SCUBA diving at depth of 29 m, 05 May 2021; 7 individuals: Munamjin-ri, Jugwang-myeon, Goseong-gun, Gangwon-do (38 ° 18 ʹ 02.4 ʺ N, 128 ° 34 ʹ 12.2 ʺ E), collected by SCUBA diving at depth of 28 m, 06 May 2021; 3 individuals: Munamjin-ri, Jugwang-myeon, Goseong-gun, Gangwon-do (38 ° 18 ʹ 04.2 ʺ N, 128 ° 34 ʹ 15.0 ʺ E), collected by SCUBA diving at depth of 32 m, 06 May 2021. All specimens are deposited in the Animal Phylogenomics Laboratory at Ewha Womans University in Seoul, Korea.	en	Park, Jina, Park, Yukyung Kim and Joong-Ki (2025): Taxonomic reassessment of the Korean Leptochiton rugatus (P. P. Carpenter, 1892) (Leptochitonidae: Polyplacophora). Journal of Species Research 14 (1): 96-105, DOI: 10.12651/JSR.2025.14.1.096
E72D87E2FFCFFFFAFF68FD38FD667AD2.taxon	description	Description. Body elongate-oval, small in size (Fig. 1 A; in examined specimen, Body Length 4.85 mm, Body Width 2.28 mm). Valves thin, creamy-white in color, sometimes stained with yellow-brown to black by environmental deposits. Girdle very narrow, white to dirty yellow in color. Gills arrangement adanal and merobranchial on both sides, from 6 th valve to the anus (Fig. 1 B). Head valve semicircular with dense granules arranged in indistinct radial lines and concentric growth lines; granules very small, uniform in size, rounded oval in shape; posterior margin widely V-shaped and nearly straight (Fig. 2 A). Intermediate valves similar from 2 nd valve to 7 th valve in width, broadly rectangular in shape, not beaked; anterior and posterior margins nearly straight, lateral margins rounded (Fig. 2 B, C). Intermediate valves dorso-ventrally rounded, not carinated, and moderately elevated in frontal view (Fig. 2 E; elevation ratio of 0.64 - 0.79 in the 5 th valve); tegmentum of central area (ca) sculptured with small rounded granules densely arranged in longitudinal rows (Fig. 2 B, C, H, I); lateral areas (la) not raised, with granules arranged in fine radial rows and several growth lines (Fig. 2 B, C, I); each granule with 3 - 5 aesthete pores, comprising one megalaesthete (me) and two to four micraesthetes (mi). Tail valve semicircular and wider than head valve; mucro (m) antemedian, protruding, slightly pointed; sculpture of antemucronal area (ama) same as central area of intermediate valves; postmucronal area (pma) similar to head valve and lateral area of intermediate valves (Fig. 2 D); anterior margin slightly convex; antemucronal and postmucronal slope (ams, pms) almost straight (Fig. 2 G). Articulamentum white, no insertion plate; apophyses (ap; sutural laminae) widely separated, short, triangular in shape, and hyaline; jugal sinus (js) wide and shallow; central calluses (cc) relatively thick and prominent (Fig. 2 F); numerous pores in radial rows, except for two central calluses connected from apophyses to ventral tegmental callus (vtc); eaves (e) very thin. Perinotum densely covered with flat, curved, ovate scales (perinotum scale; ps: length 51.1 μm, width 31.3 μm) with blunted-tip and 13 - 18 longitudinal ribs, longer near sutures (Fig. 3 A - C); outer margin densely covered with small marginal spicules (msp: length 77.4 μm, width 15.7 μm) with obtusely pointed tip and strong radial ribs (Fig. 3 A - C); sporadic marginal spines (mp: length 139 μm, width 12.5 μm) long, slender, pointed, almost smooth, with faint longitudinal lines (Fig. 3 A - C); hyponotum covered with elongate, flat, overlapping scales (hyponotum scale; hs: length 77.8 μm, width 33.1 μm) with obtusely pointed tip and 6 - 9 longitudinal ribs at the tip (Fig. 3 A, D). Radula teeth (Fig. 4) symmetrical, measuring 2.57 mm length, with 96 transverse rows of mature teeth. Central tooth (c) narrow with a small cusp bent forward; two centro-lateral teeth (cl) long with blades bent inwardly; head (h) of major lateral teeth (mlt) unicuspid, each cusp narrow, bluntly pointed; major uncinal teeth (mu)	en	Park, Jina, Park, Yukyung Kim and Joong-Ki (2025): Taxonomic reassessment of the Korean Leptochiton rugatus (P. P. Carpenter, 1892) (Leptochitonidae: Polyplacophora). Journal of Species Research 14 (1): 96-105, DOI: 10.12651/JSR.2025.14.1.096
