taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647171/files/figure.png	https://doi.org/10.5281/zenodo.4647171	Fig. 1. Trichomycterus balios, holotype, UFRGS 16229, 82.0 mm SL, Brazil, Rio Grande do Sul State, municipality of São Francisco de Paula, rio Santa Cruz, rio Caí basin.	Fig. 1. Trichomycterus balios, holotype, UFRGS 16229, 82.0 mm SL, Brazil, Rio Grande do Sul State, municipality of São Francisco de Paula, rio Santa Cruz, rio Caí basin.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647173/files/figure.png	https://doi.org/10.5281/zenodo.4647173	Fig. 2. Dorsal view of neurocranium of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL, and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL, some elements not shown.Abbreviations:AF, anterior fontanel; AN, antorbital; AP, autopalatine; EP, epioccipital; FR, frontal; LE, lateral ethmoid; i1, infraorbital sensory branch 1; i3, infraorbital sensory branch 3; i10-11, infraorbital sensory branch 10 and 11; ME, mesethmoid; MX, maxilla; PF, posterior fontanel; PM, premaxilla; po1-2, postotic sensory branches 1 and 2; PS, posttemporosupracleithrum; PT, pterotic; s1, supraorbital sensory branch 1; s3, supraorbital sensory branch 3; s6, supraorbital sensory branch 6 (epiphyseal branch); SO, tendon-bone supraorbital; SP+PO+PN, sphenoticprootic-pterosphenoid complex bone; SU, parieto-supraoccipital; WC, Weberian capsule. Scale bar = 2 mm.	Fig. 2. Dorsal view of neurocranium of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL, and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL, some elements not shown.Abbreviations:AF, anterior fontanel; AN, antorbital; AP, autopalatine; EP, epioccipital; FR, frontal; LE, lateral ethmoid; i1, infraorbital sensory branch 1; i3, infraorbital sensory branch 3; i10-11, infraorbital sensory branch 10 and 11; ME, mesethmoid; MX, maxilla; PF, posterior fontanel; PM, premaxilla; po1-2, postotic sensory branches 1 and 2; PS, posttemporosupracleithrum; PT, pterotic; s1, supraorbital sensory branch 1; s3, supraorbital sensory branch 3; s6, supraorbital sensory branch 6 (epiphyseal branch); SO, tendon-bone supraorbital; SP+PO+PN, sphenoticprootic-pterosphenoid complex bone; SU, parieto-supraoccipital; WC, Weberian capsule. Scale bar = 2 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647175/files/figure.png	https://doi.org/10.5281/zenodo.4647175	Fig. 3. Dorsal view of gill arches (right dorsal elements and gill rakers not show) of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos,paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations:BB2-4, basibranchials 2 to 4; CB1-5, ceratobranchials 1 to 5; EB1-5, epibranchials 1 to 5; HB1-3, hypobranchials 1 to 3; PB3, pharyngobranchial 3; TP; tooth plate. Scale bar = 1 mm.	Fig. 3. Dorsal view of gill arches (right dorsal elements and gill rakers not show) of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos,paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations:BB2-4, basibranchials 2 to 4; CB1-5, ceratobranchials 1 to 5; EB1-5, epibranchials 1 to 5; HB1-3, hypobranchials 1 to 3; PB3, pharyngobranchial 3; TP; tooth plate. Scale bar = 1 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647177/files/figure.png	https://doi.org/10.5281/zenodo.4647177	Fig. 4. Lateral view of left hyoid arch of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Abbreviations: AC, anterior ceratohyal; BR1-9, branchiostegal rays 1 to 9; IC, inter-ceratohyal cartilage; PC, posterior ceratohyal; VH, ventral hypohyal. Scale bar = 1 mm.	Fig. 4. Lateral view of left hyoid arch of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Abbreviations: AC, anterior ceratohyal; BR1-9, branchiostegal rays 1 to 9; IC, inter-ceratohyal cartilage; PC, posterior ceratohyal; VH, ventral hypohyal. Scale bar = 1 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647179/files/figure.png	https://doi.org/10.5281/zenodo.4647179	Fig. 5. Dorsal view of urohyal of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Scale bar = 0.5 mm.	Fig. 5. Dorsal view of urohyal of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Scale bar = 0.5 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647181/files/figure.png	https://doi.org/10.5281/zenodo.4647181	Fig. 6. Lateral view, anterior to left, of caudal skeleton of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations: HA+HAS, complex hypurapophysis composed of hypurapophysis and secondary hypurapophysis; HS, haemal spine; HU3, hypural 3; HU4+HU5, complex plate formed by co-ossification of hypurals 4 and 5; HU3+HU4+HU5, complex plate formed by co-ossification of hypurals 3 to 5; NS, neural spine; PH+HU1+HU2, complex plate formed by co-ossification of hypurals 1 and 2 and parhypural; PU1+U1, complex centrum composed of preural centrum 1 and ural centrum 1; PU2, preural centrum; UR, uroneural. Scale bar = 0.5 mm.	Fig. 6. Lateral view, anterior to left, of caudal skeleton of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations: HA+HAS, complex hypurapophysis composed of hypurapophysis and secondary hypurapophysis; HS, haemal spine; HU3, hypural 3; HU4+HU5, complex plate formed by co-ossification of hypurals 4 and 5; HU3+HU4+HU5, complex plate formed by co-ossification of hypurals 3 to 5; NS, neural spine; PH+HU1+HU2, complex plate formed by co-ossification of hypurals 1 and 2 and parhypural; PU1+U1, complex centrum composed of preural centrum 1 and ural centrum 1; PU2, preural centrum; UR, uroneural. Scale bar = 0.5 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647183/files/figure.png	https://doi.org/10.5281/zenodo.4647183	Fig. 7. Upper caudal plates of Trichomycterus balios, lateral view, anterior to left.(a) = paratype, MCP 41292, 64.7 mm SL; (b) paratype, MCP 41292, 72.3 mm SL.Abbreviations: HU3, hypural 3; HU4+HU5, complex plate formed by co-ossification of hypurals 4 and 5; HU3+HU4+HU5, complex plate formed by co-ossification of hypurals 3, 4 and 5. Scale bar = 0.5 mm.	Fig. 7. Upper caudal plates of Trichomycterus balios, lateral view, anterior to left.(a) = paratype, MCP 41292, 64.7 mm SL; (b) paratype, MCP 41292, 72.3 mm SL.Abbreviations: HU3, hypural 3; HU4+HU5, complex plate formed by co-ossification of hypurals 4 and 5; HU3+HU4+HU5, complex plate formed by co-ossification of hypurals 3, 4 and 5. Scale bar = 0.5 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647187/files/figure.png	https://doi.org/10.5281/zenodo.4647187	Fig. 8. Geographic distribution of species of Trichomycterus in the laguna dos Patos system. Some symbols represent more than one collection locality. Stars represent type localities. Trichomycterus balios (green symbols), T. brachykechenos (red symbols), T. diatropoporos (brown symbols), T. poikilos (yellow symbols), Trichomycterus cf. poikilos (yellow lozenge) and T. tropeiro (blue symbols),Abbreviations: 1, rio dos Sinos; 2, rio Caí; 3, rio dasAntas; 3’, rio Taquari-Antas; 4, rio da Prata; 5, rio Carreiro; 6, rio Guaporé; 7, rio Forqueta; 8, rio Pardo; 9, rio Jacuí; 10, laguna dos Patos; and 11, rio Mampituba basin.	Fig. 8. Geographic distribution of species of Trichomycterus in the laguna dos Patos system. Some symbols represent more than one collection locality. Stars represent type localities. Trichomycterus balios (green symbols), T. brachykechenos (red symbols), T. diatropoporos (brown symbols), T. poikilos (yellow symbols), Trichomycterus cf. poikilos (yellow lozenge) and T. tropeiro (blue symbols),Abbreviations: 1, rio dos Sinos; 2, rio Caí; 3, rio dasAntas; 3’, rio Taquari-Antas; 4, rio da Prata; 5, rio Carreiro; 6, rio Guaporé; 7, rio Forqueta; 8, rio Pardo; 9, rio Jacuí; 10, laguna dos Patos; and 11, rio Mampituba basin.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647189/files/figure.png	https://doi.org/10.5281/zenodo.4647189	Fig. 9.Arroio Bagual, municipality of Bom Jesus, locality of collection of some type specimens of Trichomycterus balios (a). Type locality of T. diatropoporos: rio da Prata at Passo do Despraiado, municipality of Nova Prata (b, photo by T. P. Carvalho). Type locality of T. poikilos: arroio Passo dos Buracos or Tipiaia on road BR-158, municipality of Júlio de Castilhos (c). Locality where most type specimens of T. brachykechenos (11 specimens) were collected: rio dos Sinos, municipality of Caraá (d, photo by R. B. Dala-Corte).All localities from Rio Grande do Sul State, Brazil.	Fig. 9.Arroio Bagual, municipality of Bom Jesus, locality of collection of some type specimens of Trichomycterus balios (a). Type locality of T. diatropoporos: rio da Prata at Passo do Despraiado, municipality of Nova Prata (b, photo by T. P. Carvalho). Type locality of T. poikilos: arroio Passo dos Buracos or Tipiaia on road BR-158, municipality of Júlio de Castilhos (c). Locality where most type specimens of T. brachykechenos (11 specimens) were collected: rio dos Sinos, municipality of Caraá (d, photo by R. B. Dala-Corte).All localities from Rio Grande do Sul State, Brazil.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647191/files/figure.png	https://doi.org/10.5281/zenodo.4647191	Fig. 10. Trichomycterus diatropoporos, holotype, MCP 46947, 58.8 mm SL, Brazil, Rio Grande do Sul State, municipality of Nova Prata, rio da Prata at Passo do Despraiado.	Fig. 10. Trichomycterus diatropoporos, holotype, MCP 46947, 58.8 mm SL, Brazil, Rio Grande do Sul State, municipality of Nova Prata, rio da Prata at Passo do Despraiado.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647194/files/figure.png	https://doi.org/10.5281/zenodo.4647194	Fig. 11. Right lower jaw of (a) Trichomycterus diatropoporos, paratype, UFRGS 16237, 57.8 mm SL in lateral view and (b) T. poikilos, paratype, MCP 22699, 79.0 mm SL, in medial view. Abbreviations: AR, anguloarticular; CP, coronoid process; DE, dentary; MC, Meckel’s cartilage. Scale bar = 1 mm.	Fig. 11. Right lower jaw of (a) Trichomycterus diatropoporos, paratype, UFRGS 16237, 57.8 mm SL in lateral view and (b) T. poikilos, paratype, MCP 22699, 79.0 mm SL, in medial view. Abbreviations: AR, anguloarticular; CP, coronoid process; DE, dentary; MC, Meckel’s cartilage. Scale bar = 1 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647196/files/figure.png	https://doi.org/10.5281/zenodo.4647196	Fig. 12. Pelvic girdle of Trichomycterus diatropoporos, paratype, UFRGS 16237, 57.8 mm SL, dorsal view. Abbreviations: BS, basipterygium; EP, external process; IP, internal process; MP, medial process; PR, pelvic-fin rays; PS, pelvic splint. Scale bar = 1 mm.	Fig. 12. Pelvic girdle of Trichomycterus diatropoporos, paratype, UFRGS 16237, 57.8 mm SL, dorsal view. Abbreviations: BS, basipterygium; EP, external process; IP, internal process; MP, medial process; PR, pelvic-fin rays; PS, pelvic splint. Scale bar = 1 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792378866EAE3F52BFB46F984.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647198/files/figure.png	https://doi.org/10.5281/zenodo.4647198	Fig. 13. Trichomycterus poikilos, holotype, UFRGS 16239, 63.3 mm SL, Brazil, Rio Grande do Sul State, municipality of Júlio de Castilhos, arroio Passo dos Buracos or Tipiaia on road BR-158, upper rio Jacuí basin.	Fig. 13. Trichomycterus poikilos, holotype, UFRGS 16239, 63.3 mm SL, Brazil, Rio Grande do Sul State, municipality of Júlio de Castilhos, arroio Passo dos Buracos or Tipiaia on road BR-158, upper rio Jacuí basin.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647173/files/figure.png	https://doi.org/10.5281/zenodo.4647173	Fig. 2. Dorsal view of neurocranium of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL, and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL, some elements not shown.Abbreviations:AF, anterior fontanel; AN, antorbital; AP, autopalatine; EP, epioccipital; FR, frontal; LE, lateral ethmoid; i1, infraorbital sensory branch 1; i3, infraorbital sensory branch 3; i10-11, infraorbital sensory branch 10 and 11; ME, mesethmoid; MX, maxilla; PF, posterior fontanel; PM, premaxilla; po1-2, postotic sensory branches 1 and 2; PS, posttemporosupracleithrum; PT, pterotic; s1, supraorbital sensory branch 1; s3, supraorbital sensory branch 3; s6, supraorbital sensory branch 6 (epiphyseal branch); SO, tendon-bone supraorbital; SP+PO+PN, sphenoticprootic-pterosphenoid complex bone; SU, parieto-supraoccipital; WC, Weberian capsule. Scale bar = 2 mm.	Fig. 2. Dorsal view of neurocranium of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL, and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL, some elements not shown.Abbreviations:AF, anterior fontanel; AN, antorbital; AP, autopalatine; EP, epioccipital; FR, frontal; LE, lateral ethmoid; i1, infraorbital sensory branch 1; i3, infraorbital sensory branch 3; i10-11, infraorbital sensory branch 10 and 11; ME, mesethmoid; MX, maxilla; PF, posterior fontanel; PM, premaxilla; po1-2, postotic sensory branches 1 and 2; PS, posttemporosupracleithrum; PT, pterotic; s1, supraorbital sensory branch 1; s3, supraorbital sensory branch 3; s6, supraorbital sensory branch 6 (epiphyseal branch); SO, tendon-bone supraorbital; SP+PO+PN, sphenoticprootic-pterosphenoid complex bone; SU, parieto-supraoccipital; WC, Weberian capsule. Scale bar = 2 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647175/files/figure.png	https://doi.org/10.5281/zenodo.4647175	Fig. 3. Dorsal view of gill arches (right dorsal elements and gill rakers not show) of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos,paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations:BB2-4, basibranchials 2 to 4; CB1-5, ceratobranchials 1 to 5; EB1-5, epibranchials 1 to 5; HB1-3, hypobranchials 1 to 3; PB3, pharyngobranchial 3; TP; tooth plate. Scale bar = 1 mm.	Fig. 3. Dorsal view of gill arches (right dorsal elements and gill rakers not show) of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos,paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations:BB2-4, basibranchials 2 to 4; CB1-5, ceratobranchials 1 to 5; EB1-5, epibranchials 1 to 5; HB1-3, hypobranchials 1 to 3; PB3, pharyngobranchial 3; TP; tooth plate. Scale bar = 1 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647177/files/figure.png	https://doi.org/10.5281/zenodo.4647177	Fig. 4. Lateral view of left hyoid arch of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Abbreviations: AC, anterior ceratohyal; BR1-9, branchiostegal rays 1 to 9; IC, inter-ceratohyal cartilage; PC, posterior ceratohyal; VH, ventral hypohyal. Scale bar = 1 mm.	Fig. 4. Lateral view of left hyoid arch of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Abbreviations: AC, anterior ceratohyal; BR1-9, branchiostegal rays 1 to 9; IC, inter-ceratohyal cartilage; PC, posterior ceratohyal; VH, ventral hypohyal. Scale bar = 1 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647179/files/figure.png	https://doi.org/10.5281/zenodo.4647179	Fig. 5. Dorsal view of urohyal of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Scale bar = 0.5 mm.	Fig. 5. Dorsal view of urohyal of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16245, 41.9 mm SL.Scale bar = 0.5 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647181/files/figure.png	https://doi.org/10.5281/zenodo.4647181	Fig. 6. Lateral view, anterior to left, of caudal skeleton of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations: HA+HAS, complex hypurapophysis composed of hypurapophysis and secondary hypurapophysis; HS, haemal spine; HU3, hypural 3; HU4+HU5, complex plate formed by co-ossification of hypurals 4 and 5; HU3+HU4+HU5, complex plate formed by co-ossification of hypurals 3 to 5; NS, neural spine; PH+HU1+HU2, complex plate formed by co-ossification of hypurals 1 and 2 and parhypural; PU1+U1, complex centrum composed of preural centrum 1 and ural centrum 1; PU2, preural centrum; UR, uroneural. Scale bar = 0.5 mm.	Fig. 6. Lateral view, anterior to left, of caudal skeleton of (a) Trichomycterus balios, paratype, UFRGS 6831, 81.7 mm SL; (b) T. diatropoporos, paratype, UFRGS 16237, 57.8 mm SL; (c) T. poikilos, paratype, MCP 22699, 79.0 mm SL; and (d) T. brachykechenos, paratype, UFRGS 16244, 51.6 mm SL.Abbreviations: HA+HAS, complex hypurapophysis composed of hypurapophysis and secondary hypurapophysis; HS, haemal spine; HU3, hypural 3; HU4+HU5, complex plate formed by co-ossification of hypurals 4 and 5; HU3+HU4+HU5, complex plate formed by co-ossification of hypurals 3 to 5; NS, neural spine; PH+HU1+HU2, complex plate formed by co-ossification of hypurals 1 and 2 and parhypural; PU1+U1, complex centrum composed of preural centrum 1 and ural centrum 1; PU2, preural centrum; UR, uroneural. Scale bar = 0.5 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647194/files/figure.png	https://doi.org/10.5281/zenodo.4647194	Fig. 11. Right lower jaw of (a) Trichomycterus diatropoporos, paratype, UFRGS 16237, 57.8 mm SL in lateral view and (b) T. poikilos, paratype, MCP 22699, 79.0 mm SL, in medial view. Abbreviations: AR, anguloarticular; CP, coronoid process; DE, dentary; MC, Meckel’s cartilage. Scale bar = 1 mm.	Fig. 11. Right lower jaw of (a) Trichomycterus diatropoporos, paratype, UFRGS 16237, 57.8 mm SL in lateral view and (b) T. poikilos, paratype, MCP 22699, 79.0 mm SL, in medial view. Abbreviations: AR, anguloarticular; CP, coronoid process; DE, dentary; MC, Meckel’s cartilage. Scale bar = 1 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647198/files/figure.png	https://doi.org/10.5281/zenodo.4647198	Fig. 13. Trichomycterus poikilos, holotype, UFRGS 16239, 63.3 mm SL, Brazil, Rio Grande do Sul State, municipality of Júlio de Castilhos, arroio Passo dos Buracos or Tipiaia on road BR-158, upper rio Jacuí basin.	Fig. 13. Trichomycterus poikilos, holotype, UFRGS 16239, 63.3 mm SL, Brazil, Rio Grande do Sul State, municipality of Júlio de Castilhos, arroio Passo dos Buracos or Tipiaia on road BR-158, upper rio Jacuí basin.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647200/files/figure.png	https://doi.org/10.5281/zenodo.4647200	Fig. 14. Paratypes of Trichomycterus poikilos (UFRGS 14992, 40.5-92.5 mm SL) with ontogenetic variation in coloration. Specimens represented in scale.	Fig. 14. Paratypes of Trichomycterus poikilos (UFRGS 14992, 40.5-92.5 mm SL) with ontogenetic variation in coloration. Specimens represented in scale.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647187/files/figure.png	https://doi.org/10.5281/zenodo.4647187	Fig. 8. Geographic distribution of species of Trichomycterus in the laguna dos Patos system. Some symbols represent more than one collection locality. Stars represent type localities. Trichomycterus balios (green symbols), T. brachykechenos (red symbols), T. diatropoporos (brown symbols), T. poikilos (yellow symbols), Trichomycterus cf. poikilos (yellow lozenge) and T. tropeiro (blue symbols),Abbreviations: 1, rio dos Sinos; 2, rio Caí; 3, rio dasAntas; 3’, rio Taquari-Antas; 4, rio da Prata; 5, rio Carreiro; 6, rio Guaporé; 7, rio Forqueta; 8, rio Pardo; 9, rio Jacuí; 10, laguna dos Patos; and 11, rio Mampituba basin.	Fig. 8. Geographic distribution of species of Trichomycterus in the laguna dos Patos system. Some symbols represent more than one collection locality. Stars represent type localities. Trichomycterus balios (green symbols), T. brachykechenos (red symbols), T. diatropoporos (brown symbols), T. poikilos (yellow symbols), Trichomycterus cf. poikilos (yellow lozenge) and T. tropeiro (blue symbols),Abbreviations: 1, rio dos Sinos; 2, rio Caí; 3, rio dasAntas; 3’, rio Taquari-Antas; 4, rio da Prata; 5, rio Carreiro; 6, rio Guaporé; 7, rio Forqueta; 8, rio Pardo; 9, rio Jacuí; 10, laguna dos Patos; and 11, rio Mampituba basin.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647189/files/figure.png	https://doi.org/10.5281/zenodo.4647189	Fig. 9.Arroio Bagual, municipality of Bom Jesus, locality of collection of some type specimens of Trichomycterus balios (a). Type locality of T. diatropoporos: rio da Prata at Passo do Despraiado, municipality of Nova Prata (b, photo by T. P. Carvalho). Type locality of T. poikilos: arroio Passo dos Buracos or Tipiaia on road BR-158, municipality of Júlio de Castilhos (c). Locality where most type specimens of T. brachykechenos (11 specimens) were collected: rio dos Sinos, municipality of Caraá (d, photo by R. B. Dala-Corte).All localities from Rio Grande do Sul State, Brazil.	Fig. 9.Arroio Bagual, municipality of Bom Jesus, locality of collection of some type specimens of Trichomycterus balios (a). Type locality of T. diatropoporos: rio da Prata at Passo do Despraiado, municipality of Nova Prata (b, photo by T. P. Carvalho). Type locality of T. poikilos: arroio Passo dos Buracos or Tipiaia on road BR-158, municipality of Júlio de Castilhos (c). Locality where most type specimens of T. brachykechenos (11 specimens) were collected: rio dos Sinos, municipality of Caraá (d, photo by R. B. Dala-Corte).All localities from Rio Grande do Sul State, Brazil.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647202/files/figure.png	https://doi.org/10.5281/zenodo.4647202	Fig. 15. Trichomycterus brachykechenos, holotype, MCN 18929, 61.1 mm SL, Brazil, Rio Grande do Sul State, municipality of Caraá, rio do Sinos.	Fig. 15. Trichomycterus brachykechenos, holotype, MCN 18929, 61.1 mm SL, Brazil, Rio Grande do Sul State, municipality of Caraá, rio do Sinos.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
CA2E031792388870EAE7F156FCE4FCA1.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/4647204/files/figure.png	https://doi.org/10.5281/zenodo.4647204	Fig. 16. Autopalatine of Trichomycterus brachykechenos, paratype, UFRGS 16245, 41.9 mm SL, dorsal view. Arrow indicates the concavity of mesial margin. Scale bar = 0.5 mm.	Fig. 16. Autopalatine of Trichomycterus brachykechenos, paratype, UFRGS 16245, 41.9 mm SL, dorsal view. Arrow indicates the concavity of mesial margin. Scale bar = 0.5 mm.	2013-06-30	Ferrer, Juliano;Malabarba, Luiz R.		Zenodo	biologists	Ferrer, Juliano;Malabarba, Luiz R.			
