taxonID	type	description	language	source
3946E2BDB95C5F1199D53BA46903717E.taxon	description	Recognition characters. Carapace semi-cylindrical, width ca. 1.6 times the length; strongly arched and dorsal surface without pile; lateral margins almost parallel (Fig. 10 A). Dorso-lateral margins well marked and strongly converging posteriorly; single pair of postero-lateral striae clearly visible (Fig. 10 A, seta). The discrete pile on the carapace described by von Hagen (1987) was not observed in the specimens examined in the present study. Front triangular and moderately wide measuring from 25 % to 29 % of the front-orbital breadth. Manus of male major claw with dorso-lateral surface covered by tubercles except along the strong dorsal groove (mostly filled with dirt); smooth surface in the submarginal longitudinal area; dorsal surface with sparse tubercles while dorso-lateral one with small and dense tubercles; fingers ca. 1.7 times the manus length; pollex almost straight but dactyl strongly arched ending in a curved downward tip, forming a very wide gap (Fig. 10 B). Ambulatory legs without pile. Male abdomen somites distinct (Fig. 9 B). Small crabs, males' CW up to 12.5 mm in a population from Caete mangrove, Para state, northern Brazil (Koch et al. 2005).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
6B1C883CD78152B98FD44A28F692B45E.taxon	description	Recognition characters. Carapace semi-cylindrical, width ca. 1.7 times the length; strongly arched and dorsal surface without any pile or other ornaments; lateral margins almost parallel (Fig. 11 C). Front triangular and moderately wide making up 20 % to 23 % of the front-orbital breadth. Dorso-lateral margins well marked and converging posteriorly; short and single pair of postero-lateral striae clearly visible (Fig. 11 C). Male major claw smooth, manus with dorsal margin lined up with minute tubercles; fingers very slender and long, dactylus ca. 1.7 times the manus length (Fig. 11 D); pollex almost straight and dactyl strongly arched ending in a curved downward tip; very wide gap between fingers. Ambulatory legs with narrow segments and devoid of pile or other ornaments. Male abdomen with 3 rd to 6 th somites fused (Fig. 9 A). Small crabs: male CW maximum 14.29 mm in a population from Itacuruca mangrove, Sepetiba Bay, southeastern Brazil (Bede et al. 2008).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
173C3EE618615C35B96618FA4D420FE4.taxon	description	Recognition characters. Carapace trapezoidal weakly arched and covered with exuberant pile (pubescence easily detached) (Fig. 2 C, seta) and strongly converging posteriorly. Dorso-lateral margins well marked and also strongly converging posteriorly; major and minor pairs of postero-lateral striae clearly visible (Fig. 2 C). Front triangular and narrow making up ca. 15 % of the front-orbital breadth. Male major claw with manus provided with a strong groove on the dorsal surface; fingers cylindrical and smooth; dactyl almost straight in the proximal two-thirds and curving down toward pollex tip and provided with a short but strong groove on the dorsal surface usually filled with dirt; moderate gap between fingers (Fig. 2 D). Ambulatory legs with wide merus ca. 3.3 times the width of proximal end of carpus; posterior surface of all segments (except dactyl) of ambulatory legs covered by pile. Male abdomen segments not fused. Medium-sized species: male CW measures up to 28.4 mm in the population from Formoso River mangrove, Pernambuco state, northeastern Brazil (Farias et al. 2014).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
C47C49CC36DA5859B4331C1BE2238A90.taxon	description	Recognition characters. Carapace semi-pentagonal strongly arched and dorsal surface without pile or other ornaments (Fig. 11 A). Dorso-lateral margins well marked and converging posteriorly; short and single pair of postero-lateral striae clearly visible (Fig. 11 A). Front triangular and moderately wide making up from 20.0 % to 23.6 % of the front-orbital breadth. Manus of male major claw with dorso-lateral surface covered by small tubercles except along the strong submarginal groove, mostly filled with dirt (Fig. 11 B, seta); both edges of dorsal margin armed with lined up by tubercles; dactyl moderately long ca. 1.4 times the manus length; pollex almost straight but dactyl strongly arched ending in a curved downward tip, forming a wide gap. Ambulatory legs with narrow segments and without pile. Male abdomen with 4 th to 6 thsomites fused. Small crabs: males with CW up to 12.0 mm in a population from Itacuruca mangrove, Sepetiba Bay, southeastern Brazil (Bede et al. 2008). Leptuca uruguayensis, however, can attain up to 19.5 mm CW in the population from Solis Grande River, Uruguay (Masunari et al. 2017).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
BE75529E69B25CEDA6F40CAE0D8874F4.taxon	description	Recognition characters. Carapace pentagonal moderately arched in the anteroposterior direction and dorsal surface without pile (Fig. 8 C). Dorso-lateral margins well-marked and converging posteriorly; major and minor pairs of postero-lateral striae clearly visible (Fig. 8 C). Front triangular and very wide making up from 36 % to 41 % of the front-orbital breadth (Fig. 1 B). Male major claw manus covered by small tubercles and provided with a strong groove (sometimes filled with dirt) on dorsal surface following the dorsal margin; fingers thick and slightly flattened; dactyl little longer than manus; pollex and dactyl curved forming a large gap (Fig. 8 D). First three ambulatory legs with pile (= woolly pubescence) limited to dorsal surface of carpus and manus (Fig. 4 B, setae), absent in ventral margin; all ambulatory legs with narrow merus and dorsal margin almost strait; last pair of ambulatory legs without piles and merus less than two 1.5 times wider than respective carpus in its maximum breadth (Fig. 7 B). Male abdominal segments never fused. Medium-sized species and one of the smallest in the genus; males' carapace width (CW) up to 19.0 mm in a population from Fortaleza, CE, Brazil (Crane 1975).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
17A58FB631DE5A52B527D6576AB76BA2.taxon	description	Recognition characters. Carapace pentagonal moderately arched and with naked dorsal surface, without pile (Fig. 6 A). Dorso-lateral margins well marked and strongly convergent posteriorly; major and minor pairs of postero-lateral striae clearly visible (Fig. 6 A). Front triangular and very wide making up between 34 % to 38 % of the front-orbital breadth. Male major claw with manus covered by tubercles and with strong groove on dorsal surface; fingers thick and slightly flattened; dactyl ca. 1.5 times the manus length; pollex almost straight with tip curved upwards; dactyl strongly arched ending in a curved downward tip; fingers form a wide gap (Fig. 6 B). Ambulatory legs with narrow merus and dorsal margin almost strait; 1 st to 3 rdambulatory legs with pile limited to dorsal surface of merus (weakly) and carpus (strongly), but all around the manus (strongly) (Fig. 4 A); last pair with scant pile on merus, carpus and manus. Male abdominal segments never fused. Medium-sized crab: males' CW up to 26.1 mm in a population from mangrove of Itajai River, southern Brazil (Scalco et al. 2016).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
818600D9ABEB5A7199D8D469BF6BB1D3.taxon	description	Recognition characters. Carapace pentagonal moderately arched and provided with small and scarce tubercles in the antero-lateral corner (Fig. 8 A); some individuals have pile on H-form depression. Dorso-lateral margins well marked and strongly convergent posteriorly (more pronounced in males); major and minor pairs of postero-lateral striae clearly visible (Fig. 8 A). Front triangular and very wide making up 30 % to 36 % of the front-orbital breadth. Male major claw with manus covered with tubercles and provided with strong groove dorsally; fingers thick and slightly flattened; dactyl ca. 1.5 times longer than manus; pollex and dactyl strongly curved forming a large gap (Fig. 8 B). Pile limited the dorsal surface of carpus and manus in the first three ambulatory legs; these legs with enlarged merus (especially the 2 nd and 3 rd), dorsal margin convex and dorsal surface with striated ornaments; last leg without piles and merus more than two times wider the respective carpus in their maximum breadth (Fig. 7 A, seta). Male abdominal segments never fused. Medium-sized crabs, male CW up to 28.3 mm and female up to 27.3 mm in a population from Itamambuca mangrove, Ubatuba, southeastern Brazil (Castiglioni and Negreiros-Fransozo 2004).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
D96748F5438C549BBA8B8EB93D9CE32F.taxon	description	Recognition characters. Carapace pentagonal moderately arched and provided with few tubercles on the surface of antero-lateral corners and on mesogastric area (Fig. 5 A). Dorso-lateral margins well marked and strongly convergent posteriorly; major and minor pairs of postero-lateral striae clearly visible (Fig. 5 B). The discrete pile on the carapace described by von Hagen (1987) was not observed in the specimens examined in the present study. Front triangular and moderately large making up ca. 22 % of front-orbital breath (Fig. 5 A, seta). Male major claw with manus covered with tubercles and provided with strong groove on dorsal margin filled with pile; fingers thick and slightly flattened; dactyl ca. 1.8 times longer than manus; pollex and dactyl strongly curved forming a large gap; a short and straight depression filled with pile at the base of pollex (Fig. 5 C, seta). Scant pile on dorsal surface of carpus and manus of the first three pair of ambulatory legs. Male abdomen somites not fused. Medium-sized species and one of the smallest in the genus; males' carapace width (CW) up to 19.1 mm in a population from Vitoria, Espirito Santo state, southeastern Brazil (von Hagen 1987).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
052BCA91C9E45E059DEE3EAFBD45B52B.taxon	description	Recognition characters. Carapace pentagonal moderately arched; profuse pile on dorsal surface forming a characteristic pattern mostly on hepatic and branchial regions (Fig. 3 A). Dorso-lateral margins well marked even covered by pile, and strongly convergent posteriorly; major and minor pairs of postero-lateral striae clearly visible (Fig. 3 A, setae). Front triangular and very wide measuring from 36 % to 38 % of the front-orbital breadth. Male major claw with manus covered with small tubercles dorsally and frontally and provided with a strong groove on dorsal margin usually filled with dirt; fingers thick and slightly flattened, and a little longer than manus; pollex and dactyl slightly curved forming a gap as wide as the fingers in their base. Exuberant piles on dorsal surface of merus, carpus and manus of all ambulatory legs; these piles can extend to ventral side of manus (Fig. 3 B). Male abdomen somites never fused. Medium-sized crabs, males with CW up to 27.0 mm in a population from Itamambuca mangrove, Ubatuba, southeastern Brazil (Colpo and Negreiros-Fransozo 2004).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
0BAFB38FB13050F8BFE443081E240B4B.taxon	description	Recognition characters. Carapace trapezoidal moderately arched and naked dorsal surface, without any ornaments. Dorso-lateral margins well marked, long and weakly converging posteriorly; postero-lateral striae absent (Fig. 2 A). Front spatulate and very narrow making up ca. 4 % of front-orbital breath (Fig. 1 A). Male major claw extremely large, with flat fingers and ornamented with tubercles, granules and small patches; narrow gap (Fig. 2 B). Ambulatory legs without pile. Male abdomen somites distinct. Large fiddler crab: male CW up to 45.0 mm and female 40.2 mm in Paraty Bay, Rio de Janeiro state, southeastern Brazil (Hirose and Negreiros-Fransozo 2008).	en	Masunari, Setuko, Martins, Salise Brandt, Anacleto, Andre Fernando Miyadi (2020): An illustrated key to the fiddler crabs (Crustacea, Decapoda, Ocypodidae) from the Atlantic coast of Brazil. ZooKeys 943: 1-20, DOI: http://dx.doi.org/10.3897/zookeys.943.52773, URL: http://dx.doi.org/10.3897/zookeys.943.52773
