taxonID	type	description	language	source
E70A87DAFFABAE7D26BEFCA6FF25F9EE.taxon	materials_examined	Material examined. Neotype: male (80.7 by 63.5 mm) (ZMHU), Kim Boi area, Hoa Binh Province, Vietnam, purchased from villagers, 14 & 15 Apr. 2007. Others: 1 female (55.5 by 43.0 mm) (ZMHU), 2 males (71.8 by 56.6, 71.5 by 56.8 mm), 2 females (63.0 by 49.5, 52.8 by 41.1 mm) (ZRC 2010.0165), same data as neotype; 1 male (58.8 by 45.3 mm), 2 females (69.4 by 53.6, 49.9 by 37.4 mm) (ZRC 2010.0166), stream in Cuc Phuong National Park, about 6 km from main gate, Ninh Binh Province, northern Vietnam, 20 ° 18 ' N 105 ° 38 ' E, coll. D. C. J. Yeo, H. H. Ng & X. Q. Nguyen, 16 Sep. 1997.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFABAE7D26BEFCA6FF25F9EE.taxon	diagnosis	Diagnosis. Carapace (Fig. 1 a) broader than long, CW 1.26 – 1.33 times (mean 1.29, n = 9) CL, low, dorsal surface (Fig. 2 a) glabrous; regions well defined. Postorbital cristae gently divergent posterolaterally; regions behind epigastric, postorbital cristae weakly granulose to weakly rugose. External orbital angle relatively broadly triangular, outer margin slightly convex to almost straight; epibranchial tooth low; anterolateral margin convex, distinctly serrated, distinctly cristate; posterolateral margins convergent posteriorly; branchial region rugose to granulose. Epistome (Fig. 2 a) posterior margin median tooth well developed, triangular. Ischium of third maxilliped broadly rectangular; exopod flagellum not exceeding merus width. Male cheliped carpus with anterior part of inner, outer margins not distinctly inflated, inner part distinctly granulose; chela with upper margin of palm granulose. Male abdominal somite 6 with lateral margins very gently convex to almost straight; male telson (Fig. 1 b) broadly triangular, with lateral margins slightly concave. G 1 (Figs. 3 a, b) broad, gently sinuous; terminal segment relatively short, about 0.30 times length of subterminal segment, relatively slender, about 3.1 times longer than broad, distally slightly curved outwards, subcylindrical, not tapering distally, with tip broadly rounded, with distinct ventral distal opening, with low, narrow dorsal flap, about 0.37 times length of terminal segment; subterminal segment broad, with distinct subrectangular cleft on subdistal outer margin of dorsal surface.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFABAE7D26BEFCA6FF25F9EE.taxon	distribution	Distribution. Kim Boi, Hoa Binh Province; Chi Ne, Hoa Binh Province; Cuc Phuong, Ninh Binh Province, northern Vietnam (Dang 1980; Dang & Ho 2001; present study).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFABAE7D26BEFCA6FF25F9EE.taxon	discussion	Remarks. The status of Ranguna Bott, 1966 [type species: Potamon (Potamon) rangoonense Rathbun, 1904], was clarified by Türkay and Naiyanetr (1987, 1989; see also ICZN 1991; Holthuis 1990; Ng 1990). Consequently, various Ranguna species were transferred to other genera, including R. kimboiense Dang, 1975, which was tentatively moved to Potamon sensu lato (see Yeo & Ng 1999), and later reassigned to Indochinamon because it possesses the suite of characters diagnostic of the genus (see Introduction; Yeo & Ng 2007). The G 1 of I. kimboiense illustrated by Dang (1975: fig. 7; as Ranguna kimboiense) does not appear to be that of a detached G 1, but rather of an in situ G 1, with the G 2 still inserted in it. Considering this, the G 1 s of the present specimens (Figs. 3 a, b) agree very well with Dang’s figures. The present specimens also match Dang’s (1975: fig. 7) illustrations of the carapace and male abdomen, and they should therefore be referred to the present species. The holotype (male 73 by 54 mm, from Kim Boi, Hoa Binh Province) of this species could not be located and is believed to be lost, like those of Indochinamon mieni (Dang, 1967). Many type specimens from this period were lost because of constant translocation because of the war (see Yeo & Ng 1998: 637, 638). Following recent checks at the Vietnam National Centre for Natural Science and Technology where Prof Dang Ngoc Thanh’s collections (including types) are deposited, and confirmed by Prof Dang, we are now confident that the type material (including holotype) of I. kimboiense are lost as well. The present male specimen from the type locality (80.7 by 63.5 mm) (ZMHU) is hereby designated as the neotype for the species so as to stabilise its taxonomy. Indochinamon kimboiense is easily separated from all other Indochinamon species except I. bavi n. sp. and I. phongnha n. sp. by the presence of a low but discernible dorsal flap (versus dorsal flap absent in all other Indochinamon species) on the terminal segment of the G 1 (Figs. 3 a, b). Indochinamon kimboiense is morphologically closer to I. bavi and I. phongnha in the G 1 (presence of the low dorsal flap) and carapace characters. There are nevertheless consistent differences between them, which are covered in the Remarks for the latter two species (see later).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFAEAE7126BEF9B2FF4AFDA7.taxon	materials_examined	Material examined. Holotype: male (56.8 by 42.9 mm) (ZMHU), Ba Vi National Park, Ha Tay Province, Vietnam, coll. V. Q. Nguyen, 19 Jun. 2001. Paratypes: 2 males (46.9 by 35.8, 47.5 by 36.3 mm) (ZRC 2010.0167), same data as holotype; 1 male (49.1 by 38.6 mm) (NMNS), Ba Vi National Park, Ha Tay Province, Vietnam, coll., 3 Jul. 1998; 1 male (57.0 by 43.0 mm) (ZMHU), Ba Vi National Park, Ha Tay Province, Vietnam, a small stream at the park's main road, ca. 9.5 km from park's headquarter, elevation ca. 600 m, coll. Tran Anh Duc & Yuchen Ang, 11 Jun. 2010; 1 male (24.5 by 20.0 mm) (ZMHU), Ba Vi National Park, a small stream near the park's main road, at elevation ca. 450 m, coll. Tran Anh Duc & Yuchen Ang, 11 Jun. 2010.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFAEAE7126BEF9B2FF4AFDA7.taxon	diagnosis	Diagnosis. Carapace (Fig. 4 a) oval, CW 1.27 – 1.32 times (mean 1.30, n = 4) CL, dorsal surface (Fig. 5 a) slightly convex longitudinally, transversely, regions well defined; epigastric crista distinct, oblique, postorbital crista distinct, separated from epigastric crista, externally terminated by cervical groove, anterolateral region scattered with oblique granules. Frontal to orbital margins cristate, lined with low, rounded granules, infraorbital margin (Fig. 5 a) interrupted just below external orbital angle; suborbital region smooth, without granules; subhepatic region covered with short rows of granules. External orbital angle right angled, slightly directed inwards, outer margin length about two times inner margin, outer margin cristate, lined with small granules, epibranchial tooth disconnected from outer margin of external orbital angle by short gap of crista, short, directed anteriorly; anterolateral margin moderately convex laterally, cristate, regularly lined with similar-sized granules, posterolateral margins convergent posteriorly. Posterior margin of epistome (Fig. 5 a) with three lobes, median longest, narrow, sharp, margin between median, lateral lobes composed of elongated granules. Ischium of third maxilliped broadly rectangular exopod flagellum longer than half width of merus. Male cheliped carpus with rugose outer surface, inner angle with sharp, long tooth, followed ventro-proximally by one to two small teeth; chela with swollen palm, scattered with low, rounded granules from outer to lower half of inner surfaces (Fig. 5 b); fingers as long as palm, straight, slightly hook-shaped distally, cutting edge regularly lined with teeth, without gap when closed. Male abdomen (Fig. 4 b) tongue-shaped, first somite with distal margin rimmed; second somite with sublateral notch on distal margin, forming rounded lateral lobes; third somite widest; sixth somite longer than telson, telson longer than width. G 1 (Fig. 3 d, e) with distal third curved outwards; subterminal segment with wide convexity on proximal two-fifths of outer margin, distal part of outer margin concave, connected dorsally to shallow transverse slope; distal segment relatively stout, tip slightly directed proximally in dorsal view, dorso-outwards in anterior view, groove for G 2 on dorso-lateral surface medially, on lateral surface distally, proximally, elongated opening on distal outer margin, dorsal flap (protuberance of ventral outer surface) low, slightly visible from dorsal view. G 2 (Fig. 3 f) longer than G 1, flagellum curving outwards, U-shaped. Live colouration. The dorsal carapace, chelipeds, and walking legs are mostly brownish-grey. The upper half of the third maxillipeds (from the palp to the anterior part of the ischium) and the suborbital, pterygostomial, subhepatic, and subbranchial regions are a light purplish. The fingers of the chelae are reddish-brown with the tips white, and the chela is dark to light reddish-brown (Fig. 6 e, f).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFAEAE7126BEF9B2FF4AFDA7.taxon	description	Habitat and distribution. This species was collected from a mountain stream in a forested area, with a rock, sand and sometimes muddy bottom, at Ba Vi National Park in northern Vietnam. It is so far known only from its type locality.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFAEAE7126BEF9B2FF4AFDA7.taxon	etymology	Etymology. The new species is named after the type locality, Ba Vi National Park. The name is used as noun in apposition.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFAEAE7126BEF9B2FF4AFDA7.taxon	discussion	Remarks. Indochinamon bavi n. sp. can be distinguished from I. kimboiense by the characters of the chela, the carapace, and the G 1. In I. bavi n. sp., the palm of the chela is only sparsely granular (Fig. 5 b), the suborbital region of the carapace lacks granules, smooth (Fig. 5 a), and the opening of the distal tip of the G 1 is placed laterally (Fig. 3 d, e). In contrast, I. kimboiense has the palm of the chela densely granular (Fig. 2 b), the suborbital region of the carapace is granular (Fig. 2 a), and the distal opening of the G 1 is placed on ventral surface (Figs. 3 a, b).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA2AE7226BEFD6CFDF3FDA7.taxon	materials_examined	Material examined. Holotype: male (68.6 by 51.9 mm) (ZMHU), Phong Nha National Park, Quang Binh Province, Vietnam, stream near km 49 mark of Ho Chi Minh highway, the branch on the west side, elevation 750 m, coll. Vu Ngoc Thanh, 22 Jun. 2006. Paratypes: 1 female (34.9 by 27.5 mm) (ZMHU), same data as holotype; 5 males (25.4 by 20.2 – 44.2 by 33.2 mm), 6 females (17.9 by 14.1 – 43.0 by 32.6 mm), 1 juvenile (15.4 by 12.5 mm) (ZRC 2010.0168), Khe Con Khai stream, Cha Noi, Phong Nha, Quang Binh Prov., Vietnam, 17 ˚ 38.196 ' N 106 ˚ 05.928 ' E, 263 m asl, coll. D. C. J. Yeo & A. D. Tran, 13 Jul. 2004; 2 males (34.3 by 26.6, 31.9 by 24.9 mm), 3 females (38.3 by 29.9 – 54.8 by 41.4 mm), 1 juvenile (17.0 by 13.1 mm) (ZRC 2010.0169), Cha Noi, Phong Nha, Quang Binh Prov., Vietnam, Stream under bridge, 17 ˚ 38.397 ' N 106 ˚ 06.975 ' E, 261 m asl, coll. D. C. J. Yeo & A. D. Tran, 13 Jul. 2004; 3 males (49.0 by 38.3 – 51.3 by 40.1 mm) (ZMHU), 11 males (16.4 by 13.3 – 64.2 by 48.0 mm), 3 females (32.6 by 25.9 – 38.9 by 30.1 mm) (ZRC 2010.0170), Vuc Tro stream, Phong Nha, Quang Binh Prov., 17 ˚ 38.188 ' N 106 ˚ 12.810 ' E, coll. D. C. J. Yeo & A. D. Tran, 14 Jul. 2004; 3 females (36.1 by 28.1 – 42.8 by 33.0 mm), 2 juveniles (19.6 by 15.3, 17.3 by 13.6 mm) (ZRC 2010.0171), Stream near Forest Ranger station 37, Phong Nha, Quang Binh Prov., Vietnam, 17 ˚ 31.395 ' N 106 ˚ 17.716 ' E, 86 m asl, coll. D. C. J. Yeo & A. D. Tran, 15 Jul. 2004; 5 males (42.0 by 31.5 – 49.1 by 37.2 mm) (ZMHU), 3 males (49.8 by 37.8 – 53.0 by 41.5 mm) (ZRC 2010.0172), Chay stream, Quang Binh Prov., Vietnam, 17 ˚ 33.146 ' N 106 ˚ 14.425 ' E, 94 m asl, coll. D. C. J. Yeo & A. D. Tran, 17 Jul. 2004; 1 male (61.9 by 47.3 mm) (ZRC 2010.0173), Km 23 + 800 HCM Way, near Hang So Dua, Pong Nha National Park, Quang Binh Province, Vietnam, coll. A. D. Tran, 11 Aug. 2001; 1 male (56.9 by 44.0 mm), 1 female (54.2 by 40.8) (ZRC 2010.0174), Thac Xoi waterfall, Phong Nha National Park, Quang Binh Province, Vietnam, coll. Q. K. Hoang & V. K. Dinl, 10 Aug. 2002.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA2AE7226BEFD6CFDF3FDA7.taxon	diagnosis	Diagnosis. Carapace (Fig. 6 a) oval, CW 1.24 – 1.34 times (mean 1.30, n = 31) CL, dorsal surface (Fig. 7 a) flat, regions well defined; epigastric crista distinct, oblique, postorbital crista composed of transverse, short cristae, separated from epigastric crista, externally terminated by cervical groove, cervical groove polygonal line-like, anterolateral region scattered with oblique short granules. Frontal to orbital margins cristate, lined with rounded granules, granules of infraorbital margin (Fig. 7 a) larger, infraorbital margin interrupted just below external orbital angle by U-shaped notch; suborbital region scattered with granules; subhepatic region covered with short rows of granules. External orbital angle narrow, directed anteriorly, outer margin length about one and a half times inner margin, outer margin cristate, lined with small granules, epibranchial tooth disconnected from outer margin of external orbital angle by short gap of crista, short, not clearly larger than following granules, directed anteriorly; anterolateral margin strongly convex laterally, cristate, regularly lined with large granules, posterolateral margins strongly convergent posteriorly. Posterior margin of epistome (Fig. 7 a) with one median, long, narrow, sharp lobe, margin besides median lobe composed of elongated granules. Ischium of third maxilliped broadly rectangular, exopod flagellum longer than half width of merus. Male cheliped carpus with rugose outer surface, inner angle with sharp, long tooth, followed vento-proximally by one small tooth; male chela (Fig. 7 b) with swollen palm, scattered with low, rounded granules from outer to lower half of inner surfaces; fingers as long as palm, straight, slightly hook-shaped distally, cutting edge regularly lined with teeth, without gape when closed. Male abdomen (Fig. 6 b) tongue-shaped, first segment with distal margin rimmed; second segment with sublateral notch on distal margin, forming rounded lateral lobes; third segment widest; sixth segment longer than telson, telson longer than width. G 1 (Fig. 8 a, b) with distal third bent outwards; subterminal segment with wide convexity on proximal twofifths of outer margin, distal part of outer margin excavated, connected dorsally to shallow transverse slope; distal segment relatively stout, tip slightly bent proximally in dorsal view, outwards in anterior view, groove for G 2 on lateral surface throughout distal segment, elongated opening on distal ventral surface, dorsal flap (protuberance of ventral outer surface) low, slightly visible medially in dorsal view. G 2 (Fig. 8 c) longer than G 1, flagellum curving outwards, J-shaped. Live colouration. The dorsal carapace and chelipeds, and ambulatory legs, are mostly brownish-grey. The upper half of the third maxillipeds (from the palp to the upper part of the ischium) and the suborbital, pterygostomial, subhepatic, and subbranchial regions are a lighter more orange shade. The anterolateral and external orbital angle margins, orbital and frontal margins, and the posterior margin of the epistome are bright orange in colour. The distal parts of the fingers of the chelae are bright orange with the tips being white, the orange colour spreading to the lower half and cutting edge of the movable finger and to most of the fixed finger (Fig. 6 a, b).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA2AE7226BEFD6CFDF3FDA7.taxon	description	Habitat and distribution. The species inhabits slow to fast flowing, forest streams with various combinations of rock, sandy, and mud substrata, and patches of leaf litter, in the Phong Nha-Ke Bang National Park, Quang Binh Province of northern-central Vietnam.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA2AE7226BEFD6CFDF3FDA7.taxon	etymology	Etymology. The new species is named after the type locality, Phong Nha National Park. The name is used as noun in apposition.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA2AE7226BEFD6CFDF3FDA7.taxon	discussion	Remarks. Indochinamon phongnha n. sp. can be distinguished from I. kimboiense by the characters of the carapace and the G 1. In I. phongnha n. sp., the anterolateral margins of the carapace are more produced (Fig. 6 a), the dorsal surface of the carapace is lower (Fig. 7 a), the G 1 is more strongly bent laterally at distal part of the subterminal segment (Fig. 8 a, b), and the dorsal flap of the distal segment of the G 1 is low but proportionately longer (Fig. 8 a, b). In contrast, in I. kimboiense, the anterolateral margins of the carapace are less produced (Fig. 1 a), the dorsal surface of the carapace is slightly convex (Fig. 2 a), the G 1 is less strongly bent laterally at distal part of the subterminal segment (Fig. 3 a, b), and the dorsal flap of the distal segment of the G 1 is slightly higher but shorter than that of I. phongnha n. sp. (Fig. 3 a, b).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA1AE7726BEF8F7FF46FB10.taxon	materials_examined	Material examined. Holotype: male (60.3 by 46.9 mm) (ZMHU), Upstream and water fall of Muong Phang stream, Muong Phang, Dien Bien Prov., 21 ˚ 27.000 ' N 103 ˚ 10.548 ' E, 1070 m asl, coll. D. C. J. Yeo & A. D. Tran, 28 Jul. 2004. Paratypes: 1 male (44.5 by 34.2 mm), 1 female (46.4 by 34.6 mm) (ZMHU), 4 males (29.6 by 23.0 – 48.4 by 37.6 mm), 2 females (45.2 by 33.9, 36.7 by 28.1 mm) (ZRC 2010.0175), same data as holotype; 2 males (41.9 by 32.3, 37.7 by 29.3 mm), 2 females (34.6 by 27.0, 24.0 by 19.1 mm) (ZMHU), 4 males (26.7 by 20.7 – 41.8 by 32.2 mm), 1 female (46.7 by 35.5 mm) (ZRC 2010.0176), Muong Phang stream, Muong Phang, Dien Bien Prov., 21 ˚ 27.159 ' N 103 ˚ 09.921 ' E, 976 m asl, coll. D. C. J. Yeo & A. D. Tran, 26 Jul. 2004.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA1AE7726BEF8F7FF46FB10.taxon	diagnosis	Diagnosis. Carapace (Fig. 10 a) oval, CW 1.26 – 1.32 times (mean 1.30, n = 10) CL, dorsal surface (Fig. 11 a) flat, regions well defined; epigastric, postfrontal cristae distinct, oblique, postorbital crista separated from epigastric crista, externally terminated by cervical groove, anterolateral region scattered with oblique granules. Frontal to orbital margins cristate, infraorbital margin lined with small, rounded granules, infraorbital margin (Fig. 11 a) interrupted just below external orbital angle; suborbital region smooth, without granules; subhepatic region covered with short rows of low granules. External orbital angle at right angle, slightly directed inwards, outer margin length about one and a half times inner margin, outer margin cristate, epibranchial tooth disconnected from outer margin of external orbital angle by short gap of crista, short, not clearly larger than following granules; anterolateral margin moderately convex laterally, cristate, regularly lined with low, similar-sized granules, posterolateral margins convergent posteriorly. Posterior margin of epistome with one long lobe (Fig. 11 a). Ischium of third maxilliped broadly rectangular exopod flagellum longer than half width of merus. Male cheliped carpus with rugose outer surface, inner angle with sharp, long tooth, followed vento-proximally by one small tooth; male chela (Fig. 11 b) with swollen palm, rugose; fingers as long as palm, straight, slightly hook-shaped distally, cutting edge regularly lined with teeth, without gape when closed. Male abdomen tongue-shaped, first segment with longitudinal ridge on middle; third segment widest; sixth segment shorter than telson, telson longer than width, lateral margin concave. G 1 (Figs. 9 d, e) with distal fifth bent outwards at about 90 °; subterminal segment with wide convexity on proximal two-fifths of outer margin, distal part of outer margin weakly concave, connected dorsally to shallow transverse slope; distal segment relatively stout, tip abruptly narrowed in dorsal view, outwards in anterior view, groove for G 2 on extensor (anterior) surface, elongated opening on flexor (posterior) surface, dorsal flap absent. G 2 (Fig. 9 f) longer than G 1, flagellum curving outwards, J-shaped. Live colouration. The dorsal carapace, anteriorly to the upper half of the third maxillipeds (from the palp to the upper part of the ischium) and anterolaterally to the suborbital, pterygostomial, subhepatic, and subbranchial regions, as well as the chelipeds, and walking legs, are mostly dark brownish-grey. The anterolateral margins show some traces of orange colour. The margins of the external orbital angle and orbital, the frontal margin, and the posterior margin of the epistome are orange in colour. The distal part of the fingers of the chelae are bright orange with white tips, the orange colour spreading to the lower half and cutting edge of the movable finger and to most of the fixed finger (Fig. 6 c, d).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA1AE7726BEF8F7FF46FB10.taxon	description	Habitat and distribution. The species was collected from a small (about 1 m wide), shallow stream in a secondary forest area near a rice field, with slow flowing water over, sandy and rocky substratum in the Dien Bien Province (north-western Vietnam).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA1AE7726BEF8F7FF46FB10.taxon	etymology	Etymology. The new species is named after Professor Dang Ngoc Thanh (Vietnam National Centre for Natural Science and Technology) for his significant contributions to the study of freshwater biodiversity and carcinology in Vietnam.	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
E70A87DAFFA1AE7726BEF8F7FF46FB10.taxon	discussion	Remarks. Indochinamon dangi n. sp. is morphologically similar to I. lipkei (Ng & Naiyanetr, 1993) [type locality: Chiang Khong District, Chiang Rai Province, northwestern Thailand], especially in its strongly bent G 1. However I. dangi n. sp. can be distinguished from I. lipkei by the oblique epigastric and postfrontal cristae (vs. straight), almost obliquely straight infraorbital margin (vs. ventrally convex infraorbital margin), distally narrowed telson (vs. moderately narrowed), almost perpendicularly bent distal segment with abruptly narrowed tip (vs. less bent terminal segment with gradually tapered tip) (Figs. 9 d, e, 10 a, 11 a; Ng & Naiyanetr, 1993: Figs. 12 A, B, 47 B – E).	en	Naruse, Tohru, Quynh, Nguyen Xuan, Yeo, Darren C. J. (2011): Three new species of Indochinamon Yeo & Ng, 2007 (Crustacea: Brachyura: Potamoidea: Potamidae) from Vietnam, with a redescription of Ranguna (Ranguna) kimboiensis Dang, 1975. Zootaxa 2732: 33-48, DOI: 10.5281/zenodo.200924
