taxonID	type	description	language	source
03F8B043FF89FF8D21DC4040B2A4FCEE.taxon	materials_examined	Holotype. MZB 10990, 75.4 mm SL; Central Kalimantan: Katingan basin; Mendawai sub-basin; Sungei Baha’e, km 64 logging road at buffer zone of Bukit Raya-Bukit Baka National Park (00 ° 47.593 ’ S 112 ° 19.220 ’ E, 218 m asl); H. H. Tan et al., 12 – 13 Aug 2007. Paratypes. MZB 10991, 28 ex., ZRC 51743, 28 ex., 32.3 – 98.6 mm SL; collection data as for holotype.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF89FF8D21DC4040B2A4FCEE.taxon	diagnosis	Diagnosis. Homaloptera batek differs from its congeners in having the following unique combination of characters: adult body pattern (dorsal and lateral) consisting of rounded dark-brown blotches, larger blotches interspaced with smaller ones, cream body and ventrum; juvenile body pattern consisting only of large, dark brown blotches on the dorsum; dorsal-fin origin just anterior to pelvic-fin origin; eight principal, 11 – 13 secondary pectoral-fin rays (modally 12); no scales on abdomen; scales on anterior dorsal half of body with an unique keeled pattern consisting of one central keel with one or two secondary keels on each side of central keel, the keels not continuous along the scale but interrupted anteriorly (Fig. 10 A); and 60 – 61 scales on the lateral line (modally 61). Maximum size: 98.6 mm SL.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF89FF8D21DC4040B2A4FCEE.taxon	description	Description. General body shape and appearance as in Figs. 1 – 5. For meristic and morphometric data see Table 1. Head elongate, pointed (head width 15.6 – 17.8 % SL; head depth 8.2 – 9.6 % SL). Eye small (eye diameter 10.4 – 13.6 % HL), positioned nearer to opercle edge than to tip of snout; nostril positioned midway between snout tip and opercle edge. Snout long (snout length 59.4 – 65.5 % HL). Mouth inferior, with three short, fleshy pairs of barbels, two rostral, one maxillary. A shallow groove just posterior to maxillary barbel (i. e., Silas’ definition of a post-rostral groove). Head dorsally covered with many minute tubercles; area at ventrum of head covered with many minute raised bumps and cream-coloured dashes. Body elongate, laterally compressed, deepest at dorsal-fin origin (body depth at dorsal-fin origin 11.3 – 13.1 % SL), slimmest at caudal peduncle (caudal peduncle depth 4.7 – 5.2 % SL). Body covered with scales, except for naked ventral area extending from area between pectoral fins to anus and area anterior to anal-fin origin. Anus situated just anterior to anal-fin origin. In juveniles, each body scale with central keel (largest specimen with only central keeled scales examined at 38.2 mm SL); adults with two additional smaller keels angled to and on either side of central keel (mainly on anterior dorsal-half of body, presence of secondary keels in specimens larger than 44.0 mm SL; see Fig. 10), the central keel sometimes with one or two additional longitudinal bumps / keels (Fig. 10 A). Anterior and posterior margins of dorsal and anal fins concave. Pectoral and pelvic fins with rounded anterior margin, pointed tips with concave edge, followed by a rounded posterior edge. Caudal fin deeply forked; lower caudal lobe about 1.30 – 1.40 times that of upper one. Vertebrae: 21 + 12, total = 33 (n = 8). Pigmentation in life. See Fig. 5 for adult coloration. Head light yellowish brown, eye with golden brown iris. Dorsum of head with numerous dark-brown blotches, largest blotch just posterior to head in line with opercular openings, two similar blotches on region between eyes, a large blotch between nostrils and two similar blotches on region just anterior to nostrils. Blotch at snout tip, followed by a series of three similar blotches along side to opercle edge; a series of three blotches just above previous series, one below nostril, one below eye and one behind eye; blotches sometimes fused. Barbels tinged with red. Body dorsally light yellowish brown with seven to nine rounded, dark-brown saddle-shaped median blotches; two or three blotches anterior to dorsal-fin origin, one anterior to and overlapping with dorsal-fin origin, one at dorsal-fin base, one overlapping and posterior to dorsal fin, two or three posterior to dorsal fin. Smaller blotches of various sizes fill up area between median blotches; blotches sometimes fused. Lateral body with similar blotch pattern, but some blotches merging towards lower half of body. Ventrum cream. Dorsal fin light yellowish brown, with three or four broad dark-brown bars, its posterior margin hyaline. Caudal fin light brown, its base darker; two broad dark-brown bars on upper caudal lobe and middle of fin, three on lower lobe; caudal fin posterior margin hyaline. Anal fin hyaline, with a single broad dark-brown bar, its anterior ray with two bars; posterior anal-fin margin hyaline. Pelvic fin light yellowish brown, its anterior edge clear, second and third rays dark brown, with three broad dark-brown bars on rest of fin, its posterior margin hyaline. Pectoral fin with similar pattern, but with up to four broad bars. See Figs. 2 – 3 for juvenile colouration. Head dorsally light yellowish brown with two dark-brown blotches, one between nostrils and another just posterior to area between eyes. Side of head evenly distributed with dark-brown pigmentation. Body dorsally dark brown, with up to six median, rounded, saddle-shaped blotches and up to six cream-coloured bars separating these; two blotches anterior to dorsal-fin base, two on dorsal fin base, and two posterior to dorsal fin. Side of body with continuation of dorsal saddle-shaped blotches to dorsal half of body, rest of body with dark, evenly distributed pigmentation. Ventrum cream. Dorsal fin with two diffuse, broad, dark-brown bars and hyaline posterior margin. Caudal fin with black base, two broad black bars on upper lobe and middle, its lower lobe almost totally black. Pelvic fin base black, with a single diffused black bar, its posterior margin hyaline. Pectoral fin with black base and two diffused broad black bars, its posterior margin hyaline. Colour in ethanol. See Figs. 1 – 4. Both adult and juvenile colour pattern in preservative similar to that in life, except for basal body colour being cream.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF89FF8D21DC4040B2A4FCEE.taxon	discussion	Remarks. Homaloptera batek can be further differentiated from the holotype of the morphologically similar species, H. tateregani, by the following characters: lower caudal lobe with three bars (vs. two); body scales with central and two secondary keels (vs. one); pectoral and pelvic fins with barred pattern (vs. plain); length of lower caudal lobe 1.30 – 1.44 times that of upper caudal lobe (vs. 1.24); fewer pelvic fin principal rays (two, vs. three); fewer lateral scales (60 – 61, vs. 63); a greater number of predorsal scales (17 – 19, vs. 14); a greater number of transverse scales (7.1.6 – 7, vs. 5.1.6); a greater number of caudal peduncular scales (3.1.4, vs. 3.1.3); shorter total length (127.5 – 131.7 % SL, vs. 133.1); longer predorsal length (46.1 – 49.1 % SL, vs. 45.3); longer preanal length (73.8 – 76.9 % SL, vs. 72.1); deeper body depth at dorsal-fin origin (11.3 – 13.1 % SL, vs. 10.4); shorter caudal peduncle length (16.3 – 18.2 % SL, vs. 19.2); shorter dorsal-fin base length (13.9 – 17.1 % SL, vs. 18.8); shorter anal-fin base length (7.7 – 9.2 % SL, vs. 10.1); longer snout length (13.2 – 14.8 % SL, vs. 12.5; 59.4 – 65.5 % HL, vs. 57.2); smaller orbit (10.4 – 13.6 % HL, vs. 14.5). Homaloptera batek can be differentiated from H. stephensoni by the following characters: mouth inferior, with thick fleshy barbels (vs. mouth sub-inferior, with thin barbels); snout long, narrow, with nostril situated between snout tip and opercle edge (vs. snout relatively long, rounded, with nostril nearer snout tip); presence of postoral groove (vs. absence); anus situated just anterior to anal-fin origin (vs. between pelvic and anal-fin origins); dorsum with up to nine dark-brown blotches (vs. six); pectoral and pelvic fins falcate (vs. rounded); length of lower caudal lobe 1.30 – 1.44 times that of upper caudal lobe (vs. 1.06 – 1.10); 60 – 61 lateral scales (vs. 43 – 50); caudal peduncle more slender (4.7 – 5.2 % SL, vs. 5.4 – 6.2); snout longer (13.2 – 14.8 % SL, vs. 11.2 – 12.3); eye smaller (10.4 – 13.6 % HL, vs. 18.3 – 22.6); interorbital width greater (31.6 – 37.5 % HL, vs. 17.6 – 21.3).	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF89FF8D21DC4040B2A4FCEE.taxon	distribution	Distribution. Homaloptera batek is known only from the upper Katingan River basin in Central Kalimantan (Fig. 11).	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF89FF8D21DC4040B2A4FCEE.taxon	etymology	Etymology. From the vernacular ‘ batek’, a traditional Indonesian patterned cloth, made by hand painting; in allusion to the unique beautiful body pattern, applied as a substantive in apposition. Field observations. The type locality, Sungei Baha’e, is one of the foothill streams draining from the Bukit Raya-Bukit Baka National Park, which straddles part of West and Central Kalimantan. The peripheral area had been logged intensively over the past 15 years or more. Access to this isolated area is easier from the Melawi River in West Kalimantan and overland via the logging tracks. Sungei Baha’e (Fig. 6) is located next to a logging track at km 64, and this track extends to more than 95 km (as of August 2007). The substrate of the river is a mix of bedrock, boulders, rocks and gravel, with clear, fast-flowing water of pH 6.4. Homaloptera batek was collected only from the fastest water flow in the riffle zone, usually from under submerged rocks and on the bedrock (observed at night). This fish usually orientates itself head against the water flow and creeps along the rock. Other syntopic fish include: Cyprinidae – Garra borneensis, Paracrossocheilus vittata, Rasbora elegans, Tor tambra; Balitoridae – Homaloptera orthogoniata, H. stephensoni, Hypergastromyzon cf. humilis, Gastromyzon cf. praestans, G. cf. auronigrus, Nemacheilus spiniferus; Sisoridae – Glyptothorax sp.; Siluridae – Silurichthys citatus. It shares its habitat with another strange endemic Bornean aquatic amphibian, Barbourula kalimantanensis (Bombinatoridae), which apparently prefers the slower-flowing areas.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF80FF8D21DC4783B43DFBD0.taxon	description	This taxon was first described by Popta (1905) based on a single specimen obtained from the upper Mahakam basin in East Kalimantan. It had not been subsequently reported upon, except by Silas (1952), who included it in a new genus, Pseudohomaloptera, based primarily on the presence of postrostral grooves, which should correctly be termed postoral grooves. However, upon comparison with the present series and other congeners, I consider this character unreliable: it could be a preservation artifact. In the fresh series of H. batek described above too, this postoral groove is present: it is thus not unique to H. tateregani. Further, it is premature to split the genus Homaloptera without a well-supported phylogenetic hypothesis.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF81FF8C21DC418EB0FCFB90.taxon	description	Homaloptera tateregani – Kottelat et al., 1993: 53, figs. 135 – 136. Pseudohomaloptera tateregani – Silas, 1952: 205.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF81FF8C21DC418EB0FCFB90.taxon	materials_examined	Holotype. RMNH 7632, 63.2 mm SL; East Kalimantan: Mahakam basin, Bo river; A. Nieuwenhuis, May – Aug 1900.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF81FF8C21DC418EB0FCFB90.taxon	diagnosis	Diagnosis. Homaloptera tateregani differs from its congeners in having the following unique combination of characters: a pronounced groove at each corner of the mouth, just posterior to the maxillary barbel, here termed the postoral groove; eight principal and 12 secondary pectoral fin rays; posterior edge of pelvic fin extending to anal fin origin; scales absent from abdomen; anterior dorsal half of body scales with keel pattern, consisting of mainly one central keel, in some specimens with an additional small keel on either side (Fig. 10 B); 63 scales on the lateral line.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF81FF8C21DC418EB0FCFB90.taxon	description	Description. General body shape and appearance as in Fig. 7. For meristics and morphometric data see Table 1. Head elongate, pointed (head width 17.0 % SL; head depth 9.3 % SL). Eye small (eye diameter 14.5 % HL), positioned nearer to opercle edge than to tip of snout, nostril positioned at midway between snout tip and opercle edge. Snout long (snout length 57.2 % HL). Mouth inferior, with three short and fleshy pairs of barbels, two rostral and one maxillary. A pronounced groove just posterior to position of maxillary barbel. Area at ventrum of head covered with many minute raised bumps. Body elongate, laterally compressed, deepest at dorsal-fin origin (body depth at dorsal-fin origin 10.4 % SL), slimmest at caudal peduncle (caudal peduncle depth 5.0 % SL). Body covered with scales, except for naked ventral area. Anus situated just anterior to anal fin origin. Body scales with central keel, sometimes with an additional smaller keel on either side (Fig. 10 B). Anterior and posterior margins of dorsal and anal fins concave. Pectoral and pelvic fins with rounded anterior margin, rounded posterior edge. Caudal fin deeply forked, with lower caudal lobe about 1.24 times that of upper caudal lobe. Vertebrae: 21 + 13, total = 34. Colour in ethanol. See Fig. 7. The whole specimen appears to be stained reddish brown, probably due to age and / or as an artefact of preservation. Dorsum and sides of head reddish brown, less pigmented towards ventral margin. Barbels cream. Body dorsally and laterally reddish brown. Dorsum of body with five faint cream narrow bars, marking the interspaces between the six saddle spots; two predorsal, two at dorsal fin base and two postdorsal. Lateral body without discernable body markings. Ventrum cream. Dorsal fin reddish brown, its posterior margin hyaline. Caudal fin cream, with darker brown base, two broad reddish brown bars on upper and lower caudal lobes and middle of fin without distinct bar. Anal fin reddish brown, with posterior margin hyaline. Pelvic and pectoral fins reddish brown, with posterior margins hyaline.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF81FF8C21DC418EB0FCFB90.taxon	discussion	Remarks. See previous treatment for differences between H. tateregani and H. batek. Homaloptera tateregani can be further differentiated from H. stephensoni by the following characters: mouth inferior, with thick fleshy barbels (vs. mouth sub-inferior. with thin barbels); snout long, narrow, with nostril midway between snout tip and opercle edge (vs. snout relatively long, rounded, with nostril nearer snout tip); presence of postoral groove (vs. absence); anus situated just anterior to anal fin origin (vs. between pelvic and anal fin origins); pectoral and pelvic fins falcate (vs. rounded); lower caudal lobe 1.24 times upper caudal lobe (vs. 1.06 – 1.10); 63 lateral scales (vs. 43 – 50); more slender caudal peduncle (5.0 % SL, vs. 5.4 – 6.2); smaller eye (14.5 % HL, vs. 18.3 – 22.6); larger interorbital width (37.7 % HL, vs. 17.6 – 21.3).	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF81FF8C21DC418EB0FCFB90.taxon	distribution	Distribution. This species is known only from the upper Mahakam River basin in East Kalimantan (Fig. 11).	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF84FF8921DC475DB1E9FBB9.taxon	description	This taxon was first described by Hora (1932) based on a single specimen obtained from the upper Mahakam basin in East Kalimantan. Hora re-identified the taxon that Popta (1905, 1906) had earlier listed as Helgia modesta Vinciguerra (a species described from Myanmar). This name had subsequently been used for populations identified from other localities in Borneo. Because of its poor original definition and illustration, this unique type specimen is herein re-described together with fresh comparable material from Central Kalimantan. The re-description may provide a basis for further comparative work with the other populations of Homaloptera in Borneo.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF85FF8A21DC445CB215FA5D.taxon	description	Helgia modesta (non-Vinciguerra) – Popta, 1906: 186.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF85FF8A21DC445CB215FA5D.taxon	materials_examined	Holotype. (EAST KALIMANTAN) – RMNH 7633, holotype, 47.6 mm SL; Upper Mahakam basin; A. Nieuwenhuis, Sep – Dec 1896. (CENTRAL KALIMANTAN) – ZRC 51741, 5 ex., 26.0 – 60.8 mm SL; Katingan basin, Mendawai subbasin; stream at buffer zone of Bukit Raya-Bukit Baka National Park. – ZRC 51742, 12 ex., 46.2 – 68.6 mm SL; Katingan basin, Mendawai sub-basin; Sungei Baha’e, km 64 logging road at buffer zone of Bukit Raya- Bukit Baka National Park. – BMNH 2001.1.15: 2671, 1 ex., 87.2 mm SL; Barito basin; Sungei Laung at Desa Maruwei. (WEST KALIMANTAN) – ZRC 38834, 7 ex., 23.5 – 41.4 mm SL; Kapuas basin, Sungei Hulu Leboyan at Keluwin. (SARAWAK) – ZRC 46986, 2 ex., 34.8 – 43.6 mm SL; Rejang basin, Kapit, Belakin area, Ulu Sungei Anap. – ZRC 39730, 2 ex., 38.4 – 38.7 mm SL; Tatau District, Bintulu, Sungei Sawi, Ayam tributary. (SABAH) – ZRC 49169, 3 ex., 32.7 – 58.6 mm SL; Danum Valley, Sungei Palum Tambun, tributary of Sungei Segama. – ZRC 49170, 3 ex., 51.4 – 52.0 mm SL; Danum Valley, Sungei Bole Kechil tributary. – ZRC 49172, 5 ex., 41.4 – 56.5 mm SL; Danum Valley, stream at km 113 on main line west (logging road) after turnoff to Borneo Rainforest Lodge. – ZRC 49174, 2 ex., 45.4 – 61.7 mm SL; Danum Valley, Sungei Bilong at ca. km 83 on main line west after turnoff to Borneo Rainforest Lodge. – ZRC 49173, 3 ex., 36.5 – 50.0 mm SL; Danum Valley, stream at km 111 on main line west after turnoff to Borneo Rainforest Lodge. – ZRC 49171, 1 ex., 55.5 mm SL; Danum Valley, Sungei Bole Kechil, km 54 on road to Danum Valley Field Centre. – ZRC 49168, 2 ex., 47.3 – 54.4 mm SL; Danum Valley, Segama basin, Sepat Kalisun stream. – ZRC 49176, 1 ex., 58.5 mm SL; Danum Valley, Cabin stream right, km 50 on road to Danum Valley Field Centre. – ZRC 49175, 1 ex., 53.0 mm SL; Danum Valley, Sungei Taliwas, km 22 on road to Danum Valley Field Centre. – ZRC 49177, 2 ex., 47.2 – 56.7 mm SL; Danum Valley, stream at km 105 on main line west after turnoff to Borneo Rainforest Lodge. – ZRC 45487, 1 ex., 42.4 mm SL; Sabah: Segama River.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF85FF8A21DC445CB215FA5D.taxon	diagnosis	Diagnosis. Homaloptera stephensoni differs from congeners in the following unique combination of characters: mouth sub-inferior with thin barbels; five principle, 12 – 13 secondary pectoral fin rays (modally 12); scales absent from abdomen; scales on anterior dorsal half of body with keel pattern, consisting of only one central keel at posterior third of scale (Fig. 10 C); and 43 – 50 scales on the lateral line.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF85FF8A21DC445CB215FA5D.taxon	description	Description. General body shape and appearance as in Figs. 8 – 9. For meristic and morphometric data see Table 1. Head elongate, rounded (head width 14.7 – 16.5 % SL; head depth 9.5 – 10.8 % SL). Eye relatively large (eye diameter 18.3 – 23.1 % HL), positioned about midway between snout tip and opercle edge, with nostril positioned nearer to snout tip. Snout relatively long (snout length 46.3 – 52.3 % HL). Mouth subinferior, with three short and slender pairs of barbels, two rostral and one maxillary. Absence of postoral groove. Area at ventrum of head without bumps or tubercles. Body elongate, laterally compressed, deepest at dorsal-fin origin (body depth at dorsal-fin origin 11.0 – 14.7 % SL), slimmest at caudal peduncle (caudal peduncle depth 5.4 – 6.2 % SL). Body covered with scales, except for naked ventrum area. Anus situated midway between pelvic fin origin and anal fin origin. Body scales with central keel at posterior third (Fig. 10 C). Dorsal and anal fins with straight anterior and posterior margins. Pectoral and pelvic fins with rounded anterior margins, rounded posterior edges. Caudal fin forked, with lower caudal lobe about 1.06 – 1.10 times that of upper caudal lobe. Vertebrae: 20 – 21 + 11 – 12, total = 32 – 33 [32] (n = 9) (figure in brackets is for the holotype). Colour in ethanol. See Figs. 8 – 9. Dorsal and lateral of head cream, with dark brown blotches, cream or white towards ventral margin. Barbels cream. Dorsal and lateral of body cream. Dorsum of body with five to six dark brown rounded blotches; one to two predorsal, one at dorsal fin base and two postdorsal. Lateral with up to eight dark brown blotches along the lateral line, with larger blotches towards caudal. Ventrum cream or white. Dorsal fin whitish, with two indistinct brown bars. Caudal fin whitish, with cream caudal base, two broad dark brown bars on upper and lower caudal lobes. Anal fin whitish, with one indistinct brown bar. Pelvic and pectoral fins whitish, with two dark brown bars, distinct only at anterior second to third rays.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF85FF8A21DC445CB215FA5D.taxon	discussion	Remarks. See sections above differentiating H. stephensoni from H. batek and H. tateregani.	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
03F8B043FF85FF8A21DC445CB215FA5D.taxon	distribution	Distribution. The type locality of this species is from the upper Mahakam River basin in East Kalimantan; and has also been recorded from Sabah (Tenom – Chin, 1990; Danum Valley – Chin, 1990, Martin-Smith & Tan, 1998), Sarawak (Rejang basin, Ulu Katibas – Parenti & Lim, 2005; Tatau basin - ZRC), West Kalimantan (Sentarum Lakes – Kottelat & Widjanarti, 2005; and Sungai Pinoh – Roberts, 1989), Central Kalimantan (Katingan – present study, and Barito basins – BMNH) and East Kalimantan (Malinau – Rachmatika et al., 2005) (Fig. 11).	en	Hui, Tan Heok (2009): A new species of hill stream loach (Teleostei: Balitoridae) from Central Kalimantan, with redescriptions of Homaloptera tateregani Popta and Homaloptera stephensoni Hora. Zootaxa 2171: 48-64, DOI: 10.5281/zenodo.189215
