taxonID	type	description	language	source
490D07BA9D2C5339868F1F1162DF4E50.taxon	diagnosis	Diagnosis. Shell medium-sized (SH up to 2.7 mm, SW up to 4.4 mm), depressed-conical. Spire ca. 1 / 6 of shell height. R 1 with regular ribs; R 2 twice longer than R 3; R 2 with ca. 72 ribs. R 3 with very low, elongated swelling. Aperture oval. Inner peristome thickened, with three very shallow indentations, always without parieto-columellar indentation. Outer peristome expanded, not reflected. Umbilicus round.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
490D07BA9D2C5339868F1F1162DF4E50.taxon	description	Description. Shell medium-sized (SH up to 2.7 mm, SW up to 4.4 mm), depressed-conical, solid, translucent, pale yellowish. Shell outline oval in apical view, spire ca. 1 / 6 of shell height. Whorls ca. 41 / 4. Protoconch low, ca. two whorls, glossy and smooth. R 1 ca. 13 / 4 whorls, with fine, regular ribs; with ca. 21 ribs in 1 / 4 whorl adjoining R 2, ribs sharper near suture and inside umbilicus than in middle of body whorl. Boundary between R 1 and R 2 distinct as R 2 contains more close-set and thicker ribs than R 1; R 2 with ca. 72 ribs that are curved towards aperture; R 2 ca. 1 / 3 whorl and twice longer than R 3. Boundary between R 2 and R 3 distinct due to shallow constriction; R 3 with fine growth lines; with very low and elongated swelling. Aperture oval; slightly oblique to shell axis. Peristome double with regular outer peristome. Inner peristome thick, expanded, with three very shallow indentations, always without parieto-columellar indentation. Outer peristome thinner, expanded, not reflected, multi-layered (visible mostly in lateral view). Umbilicus round, open, approximately one third of shell width. Operculum unknown.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
490D07BA9D2C5339868F1F1162DF4E50.taxon	etymology	Etymology. The specific epithet " Dicharax borealis " refers to the occurrence of the new species from the northern mountain of Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
490D07BA9D2C5339868F1F1162DF4E50.taxon	distribution	Distribution. Known only from the type locality in Chiang Mai Province, Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
7E65B4F0822C58BABD666E44B1A0C99B.taxon	materials_examined	Other material examined. UF 347279 from limestone pass 10.0 km NW Ban Soppong, Mae Hong Son Province, Thailand, 19 ° 33.183 ' N, 98 ° 11.533 ' E, 800 m a. s. l., 23 Jun. 1987, coll. F. G. Thompson (1 shell; Fig. 10 D). UF 345622 from 10.2 km WNW of Soppong, Road 1095, Mae Hong Son Province, Thailand, 19 ° 33 ' N, 98 ° 03 ' E, 820 m a. s. l., 20 Mar. 1988, coll. K. Auffenberg (3 shells). HA (locality code: 2018 / 41) from Hsihseng centre E ca. 6 km, right side of rd. + 500 m on unpaved rd., limestone hill, Shan State, Myanmar, 20 ° 8.002 ' N, 97 ° 18.024 ' E, 1000 m a. s. l., 7 Oct. 2018, coll. A. Hunyadi, K. Okubo, J. U. Otani (1 shell; Fig. 11 A). CUMZ 7431 from Doi Chiang Dao, Chiang Mai Province, Thailand, 19 ° 14 ' 26.7 " N, 98 ° 52 ' 49.8 " E, 24 - 28 May 1997, coll. S. Panha, J. B. Burch, P. Dumrongrojwattana (4 shells; Fig. 10 B, C).	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
7E65B4F0822C58BABD666E44B1A0C99B.taxon	diagnosis	Diagnosis. Shell small (SH up to 3.6 mm, SW up to 3.5 mm), conical. Spire ca. 1 / 2 of shell height. R 1 with regular, strong ribs; R 2 as long as R 3; R 2 with 36 - 43 ribs. R 3 with either sharp and narrow or blunt and more elongated swelling in the middle of R 3 or near aperture. Aperture round. Inner peristome blunt, slightly protruding. Outer peristome expanded (most conspicuously at the upper palatal position and near the umbilicus), reflected. Umbilicus partly or entirely covered by expanded outer peristome. Operculum multispiral.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
7E65B4F0822C58BABD666E44B1A0C99B.taxon	description	Description. Shell small (SH up to 3.6 mm, SW up to 3.5 mm), conical, solid, semitransparent, yellowish to pale orange. Shell outline round in apical view, spire ca. 1 / 2 of shell height. Whorls approaching 5, last whorl large. Protoconch low, ca. two whorls, glossy and smooth. R 1 ca. 2 whorls, with regular, strong ribs; with ca. 21 ribs in 1 / 4 whorl adjoining R 2, ribs sharper near suture and flatter near umbilicus, most prominent when approaching R 2. Boundary between R 1 and R 2 distinct as R 2 contains more close-set ribs than R 1; R 2 with 36 - 43 ribs that are curved towards aperture; R 2 ca. 1 / 4 whorl, as long as R 3. Boundary between R 2 and R 3 distinct due to shallow constriction; R 3 smooth with indistinct growth lines; with either sharp and narrow or blunt and more elongated swelling in the middle of R 3 or near aperture. Aperture round; slightly oblique to shell axis. Peristome double with prominent outer peristome. Inner peristome blunt, slightly protruding. Outer peristome strongly thickened, expanded, reflected, most conspicuously at the upper palatal position and near the umbilicus, multilayered (visible in lateral view). Umbilicus is partly or entirely closed by the reflected outer peristome. Operculum thin; multispiral ridges not significantly elevated.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
7E65B4F0822C58BABD666E44B1A0C99B.taxon	etymology	Etymology. In honor of Prof. John B. Burch, a prominent American malacologist, who, together with Prof. S. Panha, extensively studied the taxonomy and systematics of micro land snails of Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
7E65B4F0822C58BABD666E44B1A0C99B.taxon	distribution	Distribution. The new species is known from the type locality, Tham Phaya Nakharat, Khon Kaen Province, Northeastern Thailand. The other localities are Doi Chiang Dao, Chiang Mai Province and Ban Soppong, Mae Hong Son Province, Northern Thailand, and also from Shan State, Myanmar.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
E64839C4C6075B7A80C6684D5F22F4E4.taxon	materials_examined	Other material examined. CUMZ 7421 from Doi Chiang Dao, Chiang Mai Province, Thailand, 19 ° 14 ' 26.7 " N, 98 ° 52 ' 49.8 " E, 24 - 28 May 1997, coll. S. Panha, J. B. Burch, P. Dumrongrojwattana (1 shell; Figs 3 A, 6 H). CUMZ 5071 from Tham Ban Luang, Doi Ang Khang, Chiang Mai Province, Thailand, 19 ° 52 ' 13.7 " N, 99 ° 02 ' 44.1 " E, 17 Mar. 2000, coll. S. Panha, P. Tongkerd (34 shells; Figs 2 C, D, 3 B). CUMZ 7422 from Siribhum Waterfall, Doi Inthanon, Chiang Mai Province, Thailand, 18 ° 32 ' 48.5 " N, 98 ° 30 ' 44.0 " E, 13 - 15 Oct. 2009, coll. C. Sutcharit (71 shells; Figs 3 C, 4 A, B). CUMZ 7423 from Wachirathan Waterfall, Doi Inthanon, Chiang Mai Province, Thailand, 18 ° 32 ' 31.0 " N, 98 ° 35 ' 53.8 " E, 21 Jan. 2015, coll. P. Jirapatrasilp, R. Srisonchai, W. Siriwut, T. Seesamut, C. Sutcharit (10 shells; Fig. 3 D). CUMZ 7424 from Doi Inthanon, 2,000 m a. s. l, Chiang Mai Province, Thailand, 18 ° 35 ' 08.5 " N, 98 ° 29 ' 03.4 " E, 21 Jan. 2015, coll. P. Jirapatrasilp, R. Srisonchai, W. Siriwut, T. Seesamut, C. Sutcharit (3 shells; Fig. 3 E). CUMZ 7432 from Doi Inthanon, ~ 1,700 - 2,000 m a. s. l, Chiang Mai Province, Thailand, 18 ° 35 ' 08.5 " N, 98 ° 29 ' 03.4 " E, 5 - 6 Oct. 2020, coll. P. Jirapatrasilp, A. Pholyotha, W. Siriwut, N. Likhitrakarn, C. Sutcharit (6 specimens in ethanol; Fig. 5 A).	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
E64839C4C6075B7A80C6684D5F22F4E4.taxon	diagnosis	Diagnosis. Shell medium-sized (SH up to 3.5 mm, SW up to 5.5 mm), depressed-conical. Spire ca. 1 / 5 of shell height. R 1 with regular, strong ribs; R 2 longer than R 3; R 2 with 49 - 57 ribs. R 3 with sharp swelling near aperture. Aperture round. Inner peristome with four to five indentations, always with parieto-columellar indentation, sometimes weak at basal. Outer peristome fringed, slightly reflected but not conspicuous. Umbilicus round. Operculum multispiral with elevated lamella.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
E64839C4C6075B7A80C6684D5F22F4E4.taxon	distribution	Distribution. Shan State, Myanmar (Gude 1921), and Chiang Mai Province, Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
90E261C7B5A85C02872F8A21A5CAD9EA.taxon	materials_examined	Other material examined. CUMZ 7425 from Tham Luang Sa Koen, Nan Province, Thailand, 19 ° 22 ' 00.1 " N, 100 ° 32 ' 28.4 " E, 19 Jan. 2017, coll. C. Sutcharit, A. Pholyotha (174 shells and 13 specimens in ethanol; Figs 4 D, 5 B, 6 E, 7 A, B).	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
90E261C7B5A85C02872F8A21A5CAD9EA.taxon	diagnosis	Diagnosis. Shell small (SH up to 2.2 mm, SW up to 3.6 mm), depressed-conical. Spire ca. 1 / 5 of shell height. R 1 with regular ribs; R 2 as long as or shorter than R 3; R 2 with 48 - 50 ribs. R 3 with low blunt central swelling, more elevated in newly examined population. Aperture round. Inner peristome without indentation, with parieto-columellar angle in newly examined population. Outer peristome expanded, reflected. Umbilicus round. Operculum multispiral either with or without elevated lamella.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
90E261C7B5A85C02872F8A21A5CAD9EA.taxon	distribution	Distribution. Shan State, Myanmar (Gude 1921), and Nan Province, Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
1C276FCEEFB257D1B5EA4376DB254B83.taxon	materials_examined	Other material examined. CUMZ 7426 from Tham Mae La Na, Mae Hong Son Province, Thailand, 19 ° 34 ' 28.9 " N, 98 ° 12 ' 57.4 " E, 19 Jan. 2017, coll. C. Sutcharit (1 shell; Figs 6 A, 8 B).	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
1C276FCEEFB257D1B5EA4376DB254B83.taxon	diagnosis	Diagnosis. Shell very small (SH up to 1.7 mm, SW up to 2.7 mm), depressed-conical. Spire ca. 1 / 4 of shell height. R 1 with regular, strong ribs; R 2 shorter than R 3; R 2 with 35 - 36 ribs. R 3 with blunt central swelling. Aperture round. Inner peristome without indentation, with beak-like basal protrusion in newly examined population. Outer peristome expanded, not reflected. Umbilicus round.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
1C276FCEEFB257D1B5EA4376DB254B83.taxon	distribution	Distribution. Border region between Thailand and Myanmar (Gude 1921), and Mae Hong Son Province, Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
77D9199D9ECA5F1D835AD07CC058731B.taxon	diagnosis	Diagnosis. Shell small (SH up to 2.4 mm, SW up to 3.1 mm), depressed-conical with triangular dorsal side and widened, sigmoid last whorl. Spire ca. 1 / 3 of shell height. R 1 with regular, thread-like ribs; R 2 twice shorter than R 3; R 2 with ca. 18 ribs. R 3 with blunt central swelling. Aperture round. Inner peristome thick, protruding. Outer peristome expanded, not reflected. Umbilicus elliptical.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
77D9199D9ECA5F1D835AD07CC058731B.taxon	description	Description. Shell small (SH up to 2.4 mm, SW up to 3.1 mm), depressed-conical with triangular dorsal side and widened, sigmoid last whorl; solid, worn out white; the exact color of non-weathered (fresh) shells unknown. Shell outline oval in apical view, spire ca. 1 / 3 of shell height. Whorls ca. 4 and 1 / 8. Protoconch low, ca. two whorls, glossy and smooth. R 1 ca. 13 / 4 whorls with fine, regular, thread-like ribs; with ca. 14 ribs in 1 / 4 whorl adjoining R 2, ribs sharper near suture and flatter near umbilicus. Boundary between R 1 and R 2 distinct as R 2 contains more close-set ribs than R 1; R 2 with ca. 18 ribs that are curved towards aperture; R 2 ca. 1 / 8 whorl, twice shorter than R 3. Boundary between R 2 and R 3 distinct due to shallow constriction; R 3 initially coils horizontally forming a flat base, but aperture strongly descent being strongly oblique to shell axis; R 3 mostly smooth with indistinct growth lines that become stronger near aperture; with blunt central swelling. Aperture round; slightly oblique to shell axis. Peristome double with regular outer peristome. Inner peristome thick, protruding. Outer peristome slightly expanded, not reflected, multi-layered (visible mostly in lateral view). Umbilicus elliptical, open, slightly more than one third of shell width. Operculum unknown.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
77D9199D9ECA5F1D835AD07CC058731B.taxon	etymology	Etymology. In honor of Prof. Somsak Panha, a prominent Thai malacologist and our beloved professor who initiated the taxonomic and systematic study of land snails and other terrestrial invertebrates in Thailand and surrounding areas of mainland Southeast Asia.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
77D9199D9ECA5F1D835AD07CC058731B.taxon	distribution	Distribution. The new species is known only from the type locality in Kanchanaburi Province, Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
B9D7027C43135775BA3470684421F17B.taxon	diagnosis	Diagnosis. Shell medium-sized (SH up to 2.3 mm, SW up to 4.4 mm), lenticular, depressed-conical. Spire ca. 1 / 4 of shell height. R 1 with regular, thread-like ribs; R 2 three times longer than R 3; R 2 with ca. 76 ribs. R 3 strongly reduced, without swelling. Aperture round. Inner peristome with two shallow indentations. Outer peristome expanded, slightly reflected. Umbilicus elliptical. Operculum multispiral, with or without elevated lamella.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
B9D7027C43135775BA3470684421F17B.taxon	description	Description. Shell medium-sized (SH up to 2.3 mm, SW up to 4.4 mm), lenticular, depressed-conical, solid, translucent, yellowish to pale orange. Shell outline oval in apical view, spire ca. 1 / 4 of shell height. Whorls ca. 4 and 1 / 8. Protoconch low, ca. two whorls, glossy and smooth. R 1 ca. 13 / 4 whorls with fine, regular, thread-like ribs; with ca. 17 ribs in 1 / 4 whorl adjoining R 2, ribs more elevated and sharper near suture and flatter near umbilicus and at the edge of body whorl. Boundary between R 1 and R 2 distinct as R 2 contains denser and thicker ribs than R 1; R 2 with ca. 76 ribs that are curved towards aperture; R 2 ca. 1 / 3 whorl, three times longer than R 3. Boundary between R 2 and R 3 distinct due to shallow constriction; R 3 strongly reduced, without swelling, practically the constriction continues directly to outer peristome. Aperture round; slightly oblique to shell axis. Peristome double with regular outer peristome. Inner peristome slim, slightly protruding, with two shallow indentations. Outer peristome thickened, expanded, slightly reflected, multilayered (visible in lateral view). Umbilicus elliptical, open, approximately one third of shell width. Operculum either thin with low lamella or thick with elevated lamella.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
B9D7027C43135775BA3470684421F17B.taxon	etymology	Etymology. In honor of Pongrat Dumrongrojwattana, a Thai malacologist who has studied micro land snails of Thailand and was one of the collectors of this new species.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
B9D7027C43135775BA3470684421F17B.taxon	distribution	Distribution. The new species is known only from the type locality in Chiang Mai Province, Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
E6B6BF891D4A5897B6A04011D0E21EBA.taxon	materials_examined	Other material examined. CUMZ 7427 from Doi Chiang Dao, Chiang Mai Province, Thailand, 19 ° 14 ' 26.7 " N, 98 ° 52 ' 49.8 " E, 24 - 28 May 1997, coll. S. Panha, J. B. Burch, P. Dumrongrojwattana (16 shells; Fig. 6 B).	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
E6B6BF891D4A5897B6A04011D0E21EBA.taxon	diagnosis	Diagnosis. Shell small (SH up to 2 mm, SW up to 3.2 mm), depressed-conical. Spire ca. 1 / 6 of shell height. R 1 with regular, very strong ribs; R 2 shorter than R 3; R 2 with 44 - 51 ribs. R 3 with prominent, blunt swelling near aperture, anterior slope of swelling steeper than posterior slope. Aperture round. Inner peristome thickened, protruding, with slight parieto-columellar angle. Outer peristome expanded, not reflected. Umbilicus round. Operculum multispiral.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
E6B6BF891D4A5897B6A04011D0E21EBA.taxon	distribution	Distribution. Known only from Doi Chiang Dao, Chiang Mai Province, Thailand.	en	Jirapatrasilp, Parin, Pall-Gergely, Barna, Sutcharit, Chirasak, Tongkerd, Piyoros (2021): The operculate micro land snail genus Dicharax Kobelt & Moellendorff, 1900 (Caenogastropoda, Alycaeidae) in Thailand, with description of new species. Zoosystematics and Evolution 97 (1): 1-20, DOI: http://dx.doi.org/10.3897/zse.97.59143, URL: http://dx.doi.org/10.3897/zse.97.59143
