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Fig. 5. Oral views. A in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 5. Oral views. A, Hypergastromyzon humilis, CMK 10574, 31.5 mm SL; B, Hypergastromyzon abditus, MZB 17233, 37.2 mm SL; C, Hypergastromyzon sambas, MZB 17235, 32.4 mm SL.

Fig. 8. Hypergastromyzon abditus, ZRC 61400, 40.3 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 8. Hypergastromyzon abditus, ZRC 61400, 40.3 mm SL, paratype, male; close-up of lateral view of anterior half of body showing tubercles on head, body, and pectoral fin.

Fig. 2. Hypergastromyzon humilis, CMK 10574, 31.5 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 2. Hypergastromyzon humilis, CMK 10574, 31.5 mm SL, male; close-up lateral view of anterior half of body showing tubercles on head and pectoral fin.

Fig. 4. Hypergastromyzon humilis, ZRC 61394, 31.1 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 4. Hypergastromyzon humilis, ZRC 61394, 31.1 mm SL, female (?); composite of dorsal, lateral, and ventral views.

Fig. 3. Hypergastromyzon humilis, ZRC 61394, 31.1 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 3. Hypergastromyzon humilis, ZRC 61394, 31.1 mm SL, female (?); live colouration; composite of dorsal, lateral, and ventral views.

Fig. 3 in The land snail genus Pincerna Preston, 1907 (Gastropoda: Alycaeidae) from Vietnam and Laos, with description of a new species

Fig. 3. Shells (apertural view, dorsal view, ventral view, and side view) and operculum (outer surface, inner surface, and side view) of Pincerna vanbuensis (Bavay & Dautzenberg, 1900). A, syntype MNHN-IM-2000-31798; B, E, specimen from Thuận Châu, SƠn La, Vietnam, ZMHU; C, specimen from Khoune, Xieng Khouang, Laos, ZMHU; D, specimen from Xiengkho, Houaphanh, Laos, ZMHU.

Fig. 5 in The land snail genus Pincerna Preston, 1907 (Gastropoda: Alycaeidae) from Vietnam and Laos, with description of a new species

Fig. 5. Details of the shell of Pincerna clausa n. sp. (holotype VNMN-IZ 002.304). A–B, protoconch; C, R2 and sutural tube; D, R3 and boundary between R2 and R3; E, aperture; F, umbilicus.

Fig. 7. Hypergastromyzon abditus, MZB 17233, 37.2 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 7. Hypergastromyzon abditus, MZB 17233, 37.2 mm SL, holotype, male; composite of dorsal, lateral, and ventral views.

Fig. 19. Engkaria eubranchus, ZRC 46068, 39.0 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 19. Engkaria eubranchus, ZRC 46068, 39.0 mm SL, male. Top: lateral view of head region showing tuberculation pattern on opercle; bottom: close-up of dorsal view of left pectoral fin showing tuberculation pattern (not to scale).

Fig. 2 in The land snail genus Pincerna Preston, 1907 (Gastropoda: Alycaeidae) from Vietnam and Laos, with description of a new species

Fig. 2. Shells (apertural view, dorsal view, ventral view, and side view) of Pincerna species. A, Pincerna anceyi (Mabille, 1887), syntype MNHN-IM-2000-31797; B, C, Pincerna mouhoti (L. Pfeiffer, 1862): B, specimen from MƯờng La, SƠn La, Vietnam, ZMHU; C, syntype NHMUK 20170120; D, E, Pincerna costulosus Bavay & Dautzenberg, 1912: D, syntype MNHN-IM-2000-31786; E, specimen from Phong Thổ, Lai Châu, Vietnam, ZMHU.

Fig. 15. Engkaria eubranchus, ZRC 60479 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 15. Engkaria eubranchus, ZRC 60479, ca. 40 mm SL, female; live colouration; composite of dorsal, lateral, and ventral views.

Fig. 18 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 18. Oral views of Engkaria eubranchus. Top: ZRC 60479, 41.1 mm SL male; bottom: ZRC 60468, 40.1 mm SL female.

Fig. 1. Hypergastromyzon humilis, CMK 10574, 31.5 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 1. Hypergastromyzon humilis, CMK 10574, 31.5 mm SL, male; composite of dorsal, lateral, and ventral views.

Fig. 14. Engkaria eubranchus, ZRC 60479 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 14. Engkaria eubranchus, ZRC 60479, ca. 38 mm SL, male; live colouration; composite of dorsal, lateral, and ventral views.

Fig. 13 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 13. Hypergastromyzon sambas. Top and middle: ZRC 61383, 28.0 mm SL, 31.6 mm SL; lateral views showing numerous tiny black spots. Bottom: ZRC 61381, 31.0 mm SL; ventral view of female showing ripe ova (estimated at 2 mm diameter).

Fig. 6 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 6. Map of Borneo showing distribution of H. humilis (black circle), H. sambas (black square), H. abditus (white circle), and E. eubranchus (black pentagon). Each symbol may represent more than one location.

Fig. 22. Neogastromyzon chini, ZRC 59951, 37.8 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 22. Neogastromyzon chini, ZRC 59951, 37.8 mm SL, male. Top: close-up of dorsal half of body showing tuberculation on left pectoral fin and dorsum; bottom: close-up of lateral half of body showing tuberculation pattern on opercle and head.

Fig. 9. Hypergastromyzon abditus, ZRC 61397 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 9. Hypergastromyzon abditus, ZRC 61397, ca. 38 mm SL, female; freshly preserved colouration; composite of dorsal, lateral, and ventral views.

Fig. 10. Hypergastromyzon abditus, ZRC 61397, 38.0 in Hypergastromyzon revisited, with descriptions of a new genus and two new species (Teleostei: Gastromyzontidae)

Fig. 10. Hypergastromyzon abditus, ZRC 61397, 38.0 mm SL, female; composite of dorsal, lateral, and ventral views.

Fig. 6 in The land snail genus Pincerna Preston, 1907 (Gastropoda: Alycaeidae) from Vietnam and Laos, with description of a new species

Fig. 6. Synoptic view of Vietnamese and Laos Pincerna species. A, MNHN-IM-2000-31797; B, NHMUK 20170120; C, MNHN- IM-2000-31786; D, VNMN-IZ 002.304; E, MNHN-IM-2000-31798.