taxonID	type	description	language	source
03FDEE59FF9CA761FF72637B01AAFBD2.taxon	materials_examined	Material examined. Holotype: NMCR No. 29900, male (CL 6.8 mm), station M 7, Mono Beach, Panglao, 09 ° 36.1 ’ N 123 ° 45.2 ’ E, 0 – 3 m, reef platform with seagrass, 1 June 2004 (photographs). Additional material: WMNH-Na-Cr 0 163, 1 female (8.9 × 12.1 mm), Nakagusuku Bay, Okinawa Island, 9 April 1993, coll. S. Nagai (examined by Marumura & Kosaka 2003). — RUMF-ZC- 2942, 1 male (6.6 × 8.6 mm), 2 females (11.3 × 15.4, 10.6 × 14.1 mm), Minatogawa, Urasoe City, Okinawa I., 9 September 2010, coll. T. Maenosono. — RUMF-ZC- 2946, 1 male (5.9 × 7.8 mm), same locality, 22 January 2011, coll. T. Maenosono. — RUMF-ZC- 2943, 1 male (5.9 × 7.5 mm), Kaichu Doro, Uruma City, Okinawa I., 4 March 2011, coll. T. Maenosono. — RUMF-ZC- 2945, 3 females (6.2 × 7.9 – 9.4 × 12.7 mm), same locality, 13 December 2008, coll. T. Maenosono. — RUMF-ZC- 2944, 1 male (8.1 × 10.3 mm), Awase, Okinawa City, Okinawa I., 15 March 2010, coll. T. Maenosono. — NSMT-Cr 24069, 1 male (8.2 × 11.0 mm), 1 ovigerous female (8.1 × 11.2 mm), Nagura Bay, Ishigaki I., 0.5 m, coral gravels, 5 July 2011, by hand, coll. N. Ohtsuchi. — CBM-ZC 13077, 1 male (7.8 × 9.9 mm), 1 female (7.4 × 9.8 mm), same locality, 10 April 2013, by hand, coll. K. Nakamoto. — RUMF-ZC- 3745, 2 females (9.4 × 12.6, 9.2 × 12.4 mm), same data. — NSMT-Cr 24070, 3 females (7.6 × 10.0 – 8.6 × 11.0 mm), 11 April 2013, same locality, by hand, coll. K. Nakamoto. — RUMF-ZC- 3746, 1 male (3.1 × 3.8 mm), same locality, 23 July 2013, by hand, coll. K. Nakamoto. — NSMT-Cr 24071, 1 male (3.3 × 4.4 mm), 1 female (2.3 × 3.0 mm), 1 ovigerous female (9.2 × 12.5 mm), same data. — NSMT-Cr 24072, 1 male (5.3 × 6.8 mm), 1 female (10.9 × 14.1 mm), same locality, 18 October 2013, by hand, coll. K. Nakamoto. — NSMT-Cr 24073, 1 male (7.2 × 8.9 mm), same data. — NSMT-Cr 24074, 1 female (5.5 × 7.3 mm), same data. — CBM-ZC 13078, 1 female (14.3 × 15.6 mm), same data. — NSMT-Cr 24075, 1 male (3.8 × 4.9 mm), 31 October 2013, same locality, by hand, coll. K. Nakamoto. — CBM-ZC 13079, 1 male (10.0 × 13.5 mm), 16 April 2014, same locality, by hand, coll. J. Hayakawa. — CBM-ZC 7080, 1 male (8.3 × 10.8 mm), grass beds, subtidal, Uehara Beach, Iriomote I., Yaeyama Is., 8 July 2001, dip net, coll. T. Komai. Comparative material. Alox rugosum (Stimpson, 1858): WMNH-Na-Cr 0 161, 1 female (8.1 × 11.6 mm), Nakagusuku Bay, Okinawa I., 10 m, 27 March 1991, coll. Kubo (dried specimen). — RUMF-ZC- 3743, 1 male (6.4 × 9.2 mm), Sunabe, Chatan-cho, Nakagami-gun, Okinawa I., 3 m, 24 May 2014, SCUBA, coll. R. Yoshoda. — RUMF-ZC- 3744, 1 female (4.8 × 6.7 mm), same data. — CBM-ZC 3999, 1 male (7.2 × 10.2 mm), coral sand, 15 – 20 m, south of Philippines, 9 May 1997, dredge, coll. T. Komai. — Alox uru Naruse & Ng, 2006: CBM-ZC 8906, holotype male (4.4 × 5.8 mm), off Minami-Ukibaru I., Nakagusuku Bay, Ryukyu Is., 26 ° 18.966 ’ N, 127 ° 58.460 ’ E, 3 m, coll. T. Naruse & Y. Matsuno, SCUBA and dredging, 20 December 2005. Redescription on basis of specimens from Japan. Carapace (Figs. 2 A, D, 3 A) subpentagonal, divergent posteriorly, expanded laterally, 1.3 broader than length (mean CL / CW = 1.3 ± 0.0, N = 31); surface densely covered with mushroom-like tubercles, irregularly pitted. Frontal region produced anteriorly, divided into 2 rounded lobes, with elongate cavity apically, upturned in frontal view (Figs. 2 C, F, 3 A). Postfrontal protuberance wide, sometimes demarcated from median keel (Figs. 2 A, D, 3 A). Median keel distinct, generally Y-shaped, weakly broadened posteriorly, forming straight longitudinal ridge which reaches midway to cardiac region, not demarcated from cardiac region, with pair of nostril-like postfrontal cavity aside (Figs. 2 A, C, 3 A). Anterolateral region moderately eroded, with distinct groove on surface; groove parallel to anterolateral carapace borders, deep, granule-lined generally on floor, sigmoid in dorsal view; anterior half continuous to postfrontal cavity, distinctly narrowed near hepatic region; posterior half deep, moderately broad (Figs. 2 A, D, 3 A). Hepatic region convex due to median protuberance (Fig. 2 A, D). Subhepatic margin with low, broad protuberance (triangular facet), barely visible in dorsal view (Figs. 2 B, E, 3 A). Hepatic, anterolateral margins divided by shallow convcavity. Anterolateral margin slightly sinuous, indistinctly rimmed, separated from posterolateral margin with shallow indentation. Branchiostegal region densely covered with small flattened tubercles (Fig. 2 B, E). Branchial regions moderately inflated, with 2 low nodules obliquely from anterior slope to summit, separated from posterior posterolateral margin by narrow or nearly closed groove (Figs. 2 A, D, 3 A). Posterolateral margin right-angled, rounded apically, nearly straight in anterior half, horizontal, bilobed in posterior half. Cardiac region low, covered with flattened tubercles indistinctly, separated from branchial, intestinal regions by deep, granule-lined groove of variable prominence (Figs. 2 A, D, 3 A, 4 A). Intestinal region moderately elevated, granulate on surface. Posterior margin slightly convex, moderately rounded (Fig. 2 A, B). Basal antennular segment (Fig. 3 B) opeculiform, occupying antennular fossa when closed; anterior margin of fossa raised, forming rim. Basal antennal segment narrow, occupying hiatus between rim of antennular cavity, orbital submargin. Orbits small, not inflated, lateral margin bisutured. Ocular peduncles sealed by orbit when retracted. Third maxillipeds (Fig. 3 C) densely covered with flattened granules; ischium trapezoidal, with blunt ridge diagonally, irregularly pitted mediolaterally; meri subtriangular, with deep median depression (Figs. 2 C, F, 3 C). FIGURE. 2. Alox chaunos Galil & Ng, 2007. Male (A – C, 8.1 × 10.3 mm, RUMF-ZC- 2944), Awase, Okinawa City, Okinawa Island, and female (D – F, 8.1 × 11.2 mm, NSMT-Cr 24069), Nagura Bay, Ishigaki Island; G, H, medium-sized specimens of male (G, 5.9 × 7.5 mm, RUMF-ZC- 2943) and female (H, 6.2 × 7.9 mm, RUMF-ZC- 2945), Kaichu Doro, Uruma City, Okinawa Island. A, D, dorsal view; B, E, G, H, ventral view; C, F, frontal view. Chelipeds (Figs. 2, 3 D, E, 4) stout, subequal in length and shape. Merus trigonal in cross section, densely covered with indistinct flattened tubercles; upper flexor margin irregularly tuberculate in distal half, dilated distally to form rounded lobe; upper extensor margin with 4 or 5 tubercles on distal half, distal two fused at base; lower flexor margin lined with low tubercles; flexor surface with large proximal tubercle, on crossing point of upper, lower flexor margins. Carpus densely granulate. Chela (Figs. 2 B, E, 3 D, E) stout, scoop-like when both fingers closed; palm eroded proximally, covered with indistinct flattened tubercles, irregularly pitted, distinct median depression on upper surface; dactylus longer than palm (DL / PL = 1.4 ± 0.1, N = 12); immovable finger stout, overlapping dactylus at tip, inner surface with median cavity proximally, outer surface with two parallel transverse rows of small granules in between, upper row reaching half way to tip from proximal end, lower row reaching tip from proximal end, with median cavity proximally, ventrolateral margin with row of relatively distinct granules. Dactylus with broad median keels fringed with relatively distinct granules on both inner, outer surface. Ambulatory legs (Figs. 2, 3 F, 4) short; meri stout, densely covered with flattened granules, with row of large tubercles on proximal half to four-fifths of extensor margin, on upper, lower angle of flexor surface; carpi, propodi, dactyli densely covered with low, sometimes indistinct granules; granules on surface of dactyli, microscopic, subacute. Male thoracic sternum (Fig. 3 B) densely covered by mushroom-like tubercles of irregular sizes, moderately sunk medially, horizontal ridges interspaced with 3 deep, granule-lined grooves. In adult females with expanded abdomen, thoracic sternum densely covered by indistinct flattened tubercles on surface (Figs. 3 E, 4 B). Sternoabdominal cavity deep, reaching buccal cavity in both sexes (Figs. 3 B, E, G, H, 4 B). Male abdomen (Figs. 2 B, 3 G) hastate, densely covered with mushroom-like tubercles of irregular sizes; first, second somites short; third to fifth somites fused; third, fourth somites eroded medially, elevated laterally; fifth somite eroded laterally, several mushroom-like tubercles on floors of eroded parts; sixth somite trapezoid, with small distinct concavity laterally; telson distinctly narrow, elongate, almost 3 times longer than basal width (TL / TW = 3.1 ± 0.2, N = 4), 3 times longer than sixth somite (TL / SSL = 3.1 ± 0.1, N = 4). In females, abdomen prominently domed, densely covered with large, rounded granules on surface, with broad median keel defined by shallow but distinct submedian furrows (Fig. 2 E); telson relatively elongate, shorter than in male, with broad, shallow median depression (Figs. 2 E, 4 B). G 1 (Fig. 3 J, K) stocky, slightly twisted in distal half, tapering; lateral surface with long setae subdistally; mesial surface without setae; tips obtuse, directing dorsally, without setae. G 2 (Fig. 3 L, M) slender, bent dorsally, one-third length of G 1; tips dilated, spoon-like. Ontogenetic morphological changes. Male telson is elongate, almost 3 times longer than its basal width and sixth somite length (TL / TW = 3.1 ± 0.2, TL / SSL = 3.1 ± 0.1, N = 4) in larger specimens (CL = 7.2 – 8.2 mm, Figs. 2 C, 3 G); in medium-sized specimens (CL = 3.8 – 6.6 mm), it is less elongate, 2.5 times longer than the basal width (TL / TW = 2.5 ± 0.0, N = 5, Figs. 2 G, 3 H), and more than twice the length of the sixth somites (TL / SSL = 2.1 ± 0.1, N = 5); whereas it is short, 1.5 times longer than its basal width and sixth somite length in smaller ones (CL = 3.1, 3.3 mm, Fig. 3 I). In females, abdomen is prominently domed, and with short telson (TL / TW = 1.7 ± 0.1, TL / SSL = 0.8 ± 0.1, N = 6, Figs. 2 E, 4 B) in larger specimens (CL 9.2 – 11.3 mm); in medium-sized specimens (CL 5.5 – 7.6 mm), it is flattened, and with elongate telson (TL / TW = 1.8 ± 0.0, TL / SSL = 1.3 ± 0.0, N = 3, Fig. 2 H); whereas it is generally subtriangular with triangular telson (TL / TW = 1.4, TL / SSL = 1.2, N = 1) in a small specimen (CL 2.3 mm). Variations. The numerous small pits on the dorsal carapace surface vary in prominence among individuals (Figs. 1 A, 2 A, D, 3 A, 4 A), but generally, are more coalesced in smaller specimens. Granule-lined grooves separating cardiac, branchial, and intestinal regions also vary in prominence (Figs. 1 A, 2 A, D, 3 A, 4 A). Size. The largest male is 8.2 × 11.0 mm; the largest female is 14.3 × 15.6 mm; the smallest ovigerous female is 8.1 × 11.2 mm. Color in life. Eggs dark purple or reddish brown in fresh samples (Fig. 4) (see also Galil & Ng 2007: 81, figs. 1 B).	en	Ohtsuchi, Naoya, Kawamura, Tomohiko (2016): Redescription of Alox chaunos Galil & Ng, 2007 (Crustacea: Decapoda: Brachyura: Leucosiidae) new to Japan; with notes on the male characters of A. latusoides (Sakai, 1937). Zootaxa 4111 (1): 41-52, DOI: 10.11646/zootaxa.4111.1.3
03FDEE59FF9CA761FF72637B01AAFBD2.taxon	distribution	Distribution. Okinawa, Ishigaki, and Iriomote Islands, Ryukyus, southwestern Japan; Panglao Island, Philippines (Marumura & Kosaka 2003; Galil & Ng 2007; this study). The present records extend the distribution of this species northwards. Habitat. Found on reef platforms or sandy bottoms mixed with dead coral gravel in seagrass meadows (Cymodocea rotundata, C. serrulata, and Thalassia hemprichii in Ishigaki Island), or under dead corals at 0 – 3 m deep (Galil & Ng 2007; this study).	en	Ohtsuchi, Naoya, Kawamura, Tomohiko (2016): Redescription of Alox chaunos Galil & Ng, 2007 (Crustacea: Decapoda: Brachyura: Leucosiidae) new to Japan; with notes on the male characters of A. latusoides (Sakai, 1937). Zootaxa 4111 (1): 41-52, DOI: 10.11646/zootaxa.4111.1.3
03FDEE59FF9CA761FF72637B01AAFBD2.taxon	discussion	Remarks. Male specimens from the Ryukyu Islands agree well with the original description and figures (Galil & Ng 2007) and the re-examined holotype of Alox chaunos (Fig. 1: NMCR No. 29900). The male abdomen with the elongate telson in the specimens at hand are very similar to the shape of the sterno-abdominal cavity of the holotype male from Panglao, Philippines (Fig. 1 B), warranting our treating them conspecific. With the series of adult males on hand, we can confirm Galil & Ng’s (2007) observation that the elongate male telson distinguishes A. chaunos from all other congeners for which the male telson had been described or illustrated (cf. Tan & Ng 1995; Naruse & Ng 2006; Galil & Ng 2007, 2009). However, the proportions of the telson do change ontogenetically as noted above, and cannot be used as a distinguishing character when specimens are subadult or small. Other distinguishing characters of A. chaunos from congeners are discussed below. According to Galil & Ng (2007), Alox chaunos is close to A. rugosum and A. uru. Alox chaunos and A. rugosum share the moderately broad (CW / CL = 1.3), well-eroded carapace with indistinct frontal, anterolateral, and posterolateral rims, the deep cavity on the frontal summit, the distinct frontal and median keels forming Yshaped ridge, and the ambulatory legs bearing tubercles on flexor margin. However, these two species can be distinguished by the following characters: (1) carapace is divergent posteriorly in the large specimen of A. chaunos (Fig. 2 A, D) but it is divergent anteriorly only in large specimens of A. rugosum (Fig. 5 A, cf. Tan & Ng 1995: pls. 6 D – F, 7); (2) grooves parallel to anterolateral carapace margins are deep in A. chaunos (Figs. 2 A, 3 A) whereas in A. rugosum, they are shallow in anterior half, and deep but nearly occupied by mushroom-like tubercles in posterior half (Fig. 5 A, D, E); (3) anterior posterolateral margins are unarmed in A. chaunos (Figs. 2 A, D, 3 A), whereas they bear three triangular teeth on the anterolateral angle (Fig. 5 A, D, cf. Tan & Ng 1995: fig. 12 B); (4) subhepatic protuberance is broad, apically obtuse in A. chaunos (Fig. 2 B, E, C, G), while in A. rugosum, it is narrow, acuminate and produced downwards (cf. Fig. 5 B, C, F; Tan & Ng 1995: fig. 12 B); (5) immovable finger is distinctly broader than the movable finger even in large specimens of A. chaunos (PL / ChH 1.4 ± 0.1, Figs. 3 D, 4 B), but both fingers are slender in large specimens of A. rugosum (PL / ChH 1.6 – 1.7, Fig. 5 A, D, E; Tan & Ng 1995: fig. 12 C, pls. 6 D – F, 7). This character should be used with caution, however, because the proportional length of fingers change ontogenetically in the latter species (Fig. 5 D, E); (6) G 1 is relatively stouter, shorter, and more tapering in A. chaunos (Fig. 3 J, K) than in A. rugosum (cf. Tan & Ng 1995: fig. 12 I); and (7) distal part of the G 2 is spoon-like in A. chaunos (Fig. 3 L, M) whereas it is elongated and petaloid in A. rugosum (cf. Tan & Ng 1995: fig. 12 J). The relatively more eroded lateral carapace region and more strongly produced intestinal region, cited as differences by Galil & Ng (2007), is not noticeable or too variable to be useful, and cannot effectively distinguish A. chaunos (Figs. 2 A, 3 A, D, 5 A) from A. rugosum (Fig. 6).	en	Ohtsuchi, Naoya, Kawamura, Tomohiko (2016): Redescription of Alox chaunos Galil & Ng, 2007 (Crustacea: Decapoda: Brachyura: Leucosiidae) new to Japan; with notes on the male characters of A. latusoides (Sakai, 1937). Zootaxa 4111 (1): 41-52, DOI: 10.11646/zootaxa.4111.1.3
03FDEE59FF95A763FF7263B60370FB0F.taxon	materials_examined	Material examined. WMNH-Na-Cr 0 160, 1 male (5.5 × 7.2 mm), Kamiura, Kushimoto, Wakayama, August 1979, coll. S. Nagai; 1 female (7.5 × 10.2 mm), off Yamada Onsen, Onna-son, Okinawa, 21 m, 7 July 1992, coll. S. Nagai. Supplementary description on basis of male specimens from Japan. Thoracic sternum (Fig. 6 B) densely covered by flattened tubercles of regular size, deeply sunk medially, with distinct ridges interspaced with 3 deep granule-lined grooves on surface. Sterno-abdominal cavity deep, reaching buccal cavity (Fig. 6 B). Abdomen (Fig. 6 B, D) hastate, densely covered with flattened tubercles irregularly on surface; first, second somites short; third to fifth somites fused; third, fourth somites depressed medially, elevated laterally; fourth to sixth somites elevated medially, with pair of depression aside, eroded laterally, with a few flattened tubercles on floor of eroded parts; fifth somite demarcated from fourth somite by deep groove which continuous to submedian depression of fourth somite; sixth somite slightly longer than width, weakly narrowed distally; telson triangular, 1.6 times longer than basal width, 1.1 times longer than sixth somite. G 1 (Fig. 6 E, F) stout, 2.5 times longer than G 2, distal half dilated, covered with long setae on lateral, mesial surface; tip with wide opening. G 2 (Fig. 6 G) narrow; tip with petaloid process.	en	Ohtsuchi, Naoya, Kawamura, Tomohiko (2016): Redescription of Alox chaunos Galil & Ng, 2007 (Crustacea: Decapoda: Brachyura: Leucosiidae) new to Japan; with notes on the male characters of A. latusoides (Sakai, 1937). Zootaxa 4111 (1): 41-52, DOI: 10.11646/zootaxa.4111.1.3
03FDEE59FF95A763FF7263B60370FB0F.taxon	description	Female characters. See Tan & Ng (1995: 123, 124). Size. The largest male is 8.3 × 11.2 mm (Sakai 1976, as Oreophorus (Oreotlos) latusoides); the largest female is 8.1 × 11.3 mm (Tan & Ng 1995); the smallest ovigerous female is 6 × 9 mm (Sankarankutty 1962, as Tlos latus). Color in life. See Minemizu (2000: 202, unnumbered figure; 2002: 202, unnumbered figure).	en	Ohtsuchi, Naoya, Kawamura, Tomohiko (2016): Redescription of Alox chaunos Galil & Ng, 2007 (Crustacea: Decapoda: Brachyura: Leucosiidae) new to Japan; with notes on the male characters of A. latusoides (Sakai, 1937). Zootaxa 4111 (1): 41-52, DOI: 10.11646/zootaxa.4111.1.3
03FDEE59FF95A763FF7263B60370FB0F.taxon	distribution	Distribution. Pacific coast of Japan, from Suruga Bay to Kii Peninsula (Minemizu 2000, 2002; Marumura & Kosaka 2003; this study), northwest Kyushu (Sakai 1937, 1976; Miyake 1961, as Oreophorus (Oreotlos) latusoides), Okinawa Island (Marumura & Kosaka 2003); Andaman Sea (Tan & Ng 1995); Bay of Bengal (Alcock 1896, as Tlos petraeus). Habitat. Sandy bottom (Sakai 1976), or bottom of sand mixed with shell debris and gravel (Minemizu 2000, 2002), at 10 – 50 m deep (Minemizu 2000, 2002; Marumura & Kosaka 2003).	en	Ohtsuchi, Naoya, Kawamura, Tomohiko (2016): Redescription of Alox chaunos Galil & Ng, 2007 (Crustacea: Decapoda: Brachyura: Leucosiidae) new to Japan; with notes on the male characters of A. latusoides (Sakai, 1937). Zootaxa 4111 (1): 41-52, DOI: 10.11646/zootaxa.4111.1.3
03FDEE59FF95A763FF7263B60370FB0F.taxon	discussion	Remarks. A male specimen at hand agreed well with the morphological characteristics described by Sakai (1937) and Tan & Ng (1995), though both of them are based on female specimens. However, the carapace is less expanded laterally in male (CW / CL = 1.3, Fig. 6 A) than in females (CW / CL = 1.4 ± 0.1, N = 3, cf. Tan & Ng 1995: 123). In the third maxillipeds, a round circular depression on the outer surface of the merus and a shallow granulelined groove along three-quarters of mesial to posterior margins of the ischium are both present, but they are shallow, not distinct as drawn in Tan & Ng (1995: fig. 9 D) in the specimens at hand. Female specimen figured by Tan & Ng (1995: 8.1 × 11.3 mm, USNM uncatalogued) is not much larger than female specimen at hand (7.5 × 10.2 mm), and therefore, we regarded these differences as individual variation. Alcock (1896) examined eight specimens (at least one male) from the Andaman Islands and the Pedro Shoal, Sri Lanka, under the name “ Tlos petraeus ”, and described that male abdomen has a denticle in the middle line on fourth and sixth somites. It is nevertheless an important male diagnostic character of the genus Oreotlos. Tan & Ng (1995) examined two female specimens, which may represent part of eight specimens examined by Alcock (1896), and concluded that Alcock (1896) examined females of A. latusoides and that he had probably confused it with a male of an Oreotlos species. As a result and despite the lack of information of male characters, Tan & Ng (1999) removed Oreophorus (Oreotlos) latusoides to Alox based on the other diagnostic characters of this genus. Our examination of a male specimen from Kii Peninsula, revealed the absence of a median denticle on the third to sixth somite. The present generic status of A. latusoides is thus supported. As discussed above, according to the key of Tan & Ng (1995), A. chaunos is closest to A. latusoides. Shared characters include: a broad, non-demarcated median keel; a median depression in the third maxilliped; and the stout, scoop-like chelae with broad immovable fingers. Nevertheless, A. chaunos can be readily distinguished from A. latusoides by the following characters: (1) anterolateral part of the carapace is moderately eroded and has a deep sigmoid groove in A. chaunos (Figs. 2 A, D, 3 A) but it is strongly eroded, and without distinct groove in A. latusoides (Fig. 6 A; Tan & Ng 1995: pl. 4 D); (2) subhepatic protuberance is more prominent in A. chaunos (Figs. 2 A, D, 3 A) than in A. latusoides (Fig. 6 A; Tan & Ng 1995: pl. 4 D, F); (3) hepatic and anterolateral carapace margins are divided by a broad concavity in A. chaunos (Figs. 2 A, D, 3 A) but such a concavity is absent in A. latusoides (Fig. 6 A); (4) groove along on the mesial to posterior margin of the third maxilliped is absent in A. chaunos (Figs. 2 C, F, 3 C) but it is present in A. latusoides (Fig. 6 B; Tan & Ng 1995: fig. 9 D); (5) male thoracic sternum is relatively less depressed medially in A. chaunos (Fig. 2 B, G) than in A. latusoides (Fig. 6 B); (6) G 1 is tapering, twisted, tips directed dorsally, without setae on the lateral surfaces in A. chaunos (Fig. 3 J, K), but the shaft is dilated subdistally, not twisted, tips directed ventrally, with short setae densely on lateral surface in A. latusoides (Fig. 6 B, C); and (7) the G 2 is one-third the length of the G 1, and the tip is spoon-like in A. chaunos (Fig. 2 L, M) but it is more than a half in length of G 1, and the tip is elongate and petaloid in A. latusoides (Fig. 6 G). Furthermore, it is shown here that the male telson of A. chaunos is proportionally longer (TL / TW = 2.5 ± 0.0, Fig. 2 G) than those of A. latusoides (TL / TW = 1.6, Fig. 6 B, D) when similar-sized specimens are compared. The habitat also appears to be different in the two species. All known specimens of A. chaunos were recorded from reef flats or sandy bottoms shallower than 3 m, whereas those of A. latusoides were from subtidal rocky reefs 20 – 62 m deep (Alcock 1896; Sakai 1976; Marumura & Kosaka 2003).	en	Ohtsuchi, Naoya, Kawamura, Tomohiko (2016): Redescription of Alox chaunos Galil & Ng, 2007 (Crustacea: Decapoda: Brachyura: Leucosiidae) new to Japan; with notes on the male characters of A. latusoides (Sakai, 1937). Zootaxa 4111 (1): 41-52, DOI: 10.11646/zootaxa.4111.1.3
