taxonID	type	description	language	source
0C79FE9B183B574AB7C67E78F7235078.taxon	type_taxon	Type species. Trichodactylus constrictus Pearse, 1911, by monotypy.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
0C79FE9B183B574AB7C67E78F7235078.taxon	diagnosis	Diagnosis. Carapace: anterolateral margin with up 2 – 3 teeth of variable development (vestigial, small or well-developed teeth). Efferent branchial channel: aperture with yugal lateral lobe absent. Pleon: pleonal somites III – V fused. Telson (male): campaniform; anterior margin slightly shorter than posterior margin of pleonal somite VI. G 1: simple, strongly or slightly bent; distal half subcylindrical, distinctly tapering, without lobes on lateral and / or mesial surfaces; distal opening narrow, subcircular, situated terminally. G 2: shorter than G 1, apex tapering. Small-sized species (up to 30 mm CW).	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
0C79FE9B183B574AB7C67E78F7235078.taxon	distribution	Distribution. Atlantic drainage in southern Mexico.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
D5C5901E3EB05476AA082007F8ADFAF3.taxon	type_taxon	Type genus. Trichodactylus Latreille, 1828, designated by Pretzmann (1978 b).	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
D5C5901E3EB05476AA082007F8ADFAF3.taxon	diagnosis	Diagnosis. Carapace: lateral margin devoid of teeth or with vestigial, reduced or developed teeth (usually up to 3 on anterolateral margin; posterolateral margin rarely with 1 – 2 vestigial teeth); lower orbital margin: inner corner with blunt projection sometimes absent. Efferent branchial channel: aperture with yugal lateral lobe absent. Third maxilliped, meri: distal external spine triangular, acute. Axial skeleton, interosternites: ie 4 / ie 5, ie 5 / ie 6, ie 6 / ie 7 extended mesially, reaching sternum midline as conspicuously elevated phragma; ie 7 / ie 8 interrupted mesially, not extended to sternum midline (see Magalhães and Türkay, 1996 a: fig. 7; Pedraza et al., 2015: figs. 3 A, 5 A); ie 7 / ie 8 separated from junction plate mesially (see Pedraza et al., 2015: figs. 4 A, 6 A). Pleon: pleonal somites free. Telson (male): subtriangular; anterior margin as broad as posterior margin of pleonal somite VI. G 1: simple, straight; positioned longitudinally in sternopleonal cavity; distal half subcylindrical, with lateral and mesial surfaces straight or slightly convex; distal opening wide, V-shaped, directed ventrally, apex usually regularly convex or slightly angled. G 2: longer than G 1. Large-sized species (up to 50 mm CW).	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
CFCF85D28F0D50D7B40AE11C0050084A.taxon	type_taxon	Type genus. Mikrotrichodactylus Pretzmann, 1968, by present designation.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
CFCF85D28F0D50D7B40AE11C0050084A.taxon	diagnosis	Diagnosis. Carapace: lateral margin devoid of teeth or usually with up to 5 vestigial, small or developed teeth (some species with 1 – 2 vestigial or developed teeth on posterolateral margin); lower orbital margin: inner corner with distinct sharp or blunt projection. Third maxilliped, meri: distal external spine reduced. Axial skeleton, interosternites: ie 4 / ie 5, ie 5 / ie 6, ie 6 / ie 7 extended mesially, reaching sternum midline as inconspicuous phragma, being ie 6 / ie 7 noticeable low (vestigial in A. constrictus); ie 7 / ie 8 fused to junction plate mesially (see Pedraza et al., 2015: figs. 4 B, 6 B). Pleon: pleonal somites free (except in Avotrichodactylus, with pleonal somites III – V fused). Telson (male): subtriangular or campaniform; anterior margin as broad as or slightly shorter than posterior margin of pleonal somite VI. G 1: simple, straight or more or less bent (in Avotrichodactylus); positioned more or less diagonally in sternopleonal cavity; distal half subcylindrical, with or without distinct lobes on lateral and / or mesial surfaces, or tapering (in Avotrichodactylus); distal opening wide, its apex symmetrical, regularly convex, asymmetrical, with mesodorsally directed projection, or very narrow (in Avotrichodactylus). G 2: longer or shorter (in Avotrichodactylus and Rodriguezia) than G 1. Small-sized species (up to 30 mm CW).	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
AC2455883A5A59B39E94C7516E892990.taxon	type_taxon	Type species. Mikrotrichodactylus borellianus Nobili, 1896, by original designation.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
AC2455883A5A59B39E94C7516E892990.taxon	diagnosis	Diagnosis. Carapace: lateral margin devoid of teeth or usually with up to 5 teeth of variable development (vestigial, small or well-developed teeth) in antero- and / or postero-lateral margins. Efferent branchial channel: aperture with yugal lateral lobe present. P 2 – P 5: dactyli and propodi covered by felt-like pubescence; Pleon: pleonal somites free; male pleon usually very wide. Telson (male): anterior margin as broad as or slightly shorter than posterior margin of pleonal somite VI. G 1: simple, straight, positioned more or less diagonally in the sternopleonal cavity; distal half subcylindrical, with or without distinct lobes on lateral and / or mesial surfaces; distal opening wide, V-shaped, fusiform or subtrapezoidal, directed mesially, apex regularly convex, slightly concave or produced mesodorsally. G 2: longer than G 1. Small-sized species (up to 30 mm CW).	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
AC2455883A5A59B39E94C7516E892990.taxon	distribution	Distribution. Atlantic drainage in northern, center and southern South America (in the Amazon basin, the Paraguay-lower Parana River system, as well as in some coastal river basins of southern Brazil and Uruguay).	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
631515A95D905A3C9B56D3DA84FFCB9A.taxon	type_taxon	Type species. Trichodactylus villalobosi Rodríguez & Manrique, 1967, by original designation.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
631515A95D905A3C9B56D3DA84FFCB9A.taxon	diagnosis	Diagnosis. Carapace: lateral margin devoid of teeth. Efferent branchial channel: aperture with yugal lateral lobe absent. Pleon: pleonal somites free. Telson (male): subtriangular; anterior margin nearly as broad as posterior margin of pleonal somite VI. G 1: simple, nearly straight; distal half subcylindrical, with weakly developed lobes on ventrolateral surface; distal opening wide, subcircular, apex symmetrical, situated terminally. G 2: shorter than G 1; apex lanceolate or subtriangular. Small-sized species (up to 30 mm CW).	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
631515A95D905A3C9B56D3DA84FFCB9A.taxon	distribution	Distribution. Atlantic drainage in southern Mexico.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
AC1A928B26AE5C719F893CFCA0268AB8.taxon	type_taxon	Type species. Trichodactylus fluviatilis Latreille, 1828, by monotypy.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
AC1A928B26AE5C719F893CFCA0268AB8.taxon	diagnosis	Diagnosis. Same as for the tribe.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
AC1A928B26AE5C719F893CFCA0268AB8.taxon	distribution	Distribution. Atlantic drainage in coastal river basins of the northeastern, southeastern and southern Brazil, from the state of Sergipe to northeastern part of the state of Rio Grande do Sul, as well as in the Upper Paraná River basin in the states of São Paulo and Paraná.	en	Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L., Mantelatto, Fernando L. (2025): Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations. Arthropod Systematics & Phylogeny 83: 315-329, DOI: 10.3897/asp.83.e153079
