Macropsobrycon uruguayanae Eigenmann, 1915

Jerep, Fernando C. & Malabarba, Luiz R., 2011, Revision of the genus Macropsobrycon Eigenmann, 1915 (Characidae: Cheirodontinae: Compsurini), Neotropical Ichthyology 9 (2), pp. 299-312: 302-308

publication ID

http://doi.org/ 10.1590/S1679-62252011005000015

persistent identifier

http://treatment.plazi.org/id/B97D87C1-FFBE-FFD8-FF2E-FD4BFBB9FC16

treatment provided by

Carolina

scientific name

Macropsobrycon uruguayanae Eigenmann, 1915
status

 

Macropsobrycon uruguayanae Eigenmann, 1915   Figs. 1-7 View Fig View Fig View Fig View Fig View Fig View Fig View Fig

Macropsobrycon uruguayanae Eigenmann, 1915: 48   [original description; dentition figured; type locality Uruguayana (Uruguaiana) and Cacequi, Rio Grande do Sul, Brazil, rio Uruguay drainage]. -Henn, 1928: 59 [type material listed from Carnegie Museum]. -Ibarra & Stewart, 1987: 54 [type material listed from Field Museum of Natural History]. - Ringuelet, 1967 [listed as freshwater fish from Argentina]. - Géry, 1972: 15-18 [inclusion inAphyoditeini]. - Géry, 1973: 108-109 [compared to Macropsobrycon xinguensis   ]. - Géry, 1977: 594 [in key to Aphyoditeina genera and species]. - Malabarba 1989: 136 [listed to laguna dos Patos drainage]. - Burns et al., 1997: 434 [listed as inseminating species]. - Malabarba, 1998: 218 [phylogenetic diagnosis of the genus and placement in Compsurini   ]. - Burns et al., 1998: 242 [short description of sperm ultrastructure]. -Malabarba & Weitzman, 1999: 416, 427 [comparison with Acinocheirodon melanogramma   ]. -Malabarba & Weitzman, 2000: 270, 279-280 [comparison with Kolpotocheirodon theloura   ]. -López et al., 2003: 31 [listed from Argentina]. -Malabarba et al., 2003: 217 [listed in Cheirodontinae   ]. - Quagio-Grassiotto et al., 2003: 41 [sperm morphology compared to other characiforms]. -Menni, 2004: 78 [listed from Argentina]. - Malabarba et al., 2004: 324-325 [comparison with Kolpotocheirodon figueiredoi   ]. - Malabarba, 2007: 37 [listed in Cheirodontinae   ]. - Pecio et al., 2007: 458 [sperm morphology compared along with other inseminating characids]. - Oliveira et al., 2008: 691- 697 [description of sperm ultrastructure and comparison to inseminating characids]. - Bührnheim et al., 2008: 671 [referred as bearing conical teeth]. - Miquelarena et al., 2008: 78 [listed from Argentina]. - Javonillo et al., 2010: 505-507 [relationships within Characidae   ]. - Azevedo et al., 2010: 87-96 [reproductive biology and gill gland development].

Diagnosis. Same as the genus.

Description. Morphometrics given in Table 1. Body slightly elongate and compressed, deepest at dorsal-fin origin. Dorsal profile convex from snout tip to dorsal-fin origin, straight or slightly convex from that point to adipose-fin origin. Ventral profile convex from snout tip to pelvic-fin insertion, straight or somewhat concave up to anal-fin origin, straight to convex on anal-fin base. Caudal-peduncle profile slightly concave dorsally and ventrally. Snout short, mouth superior above horizontal line projected through pupil dorsal border and below horizontal line projected through orbit dorsal edge.

Premaxilla slender with 3(1), 4(1), 5(11), 6(14) or 7(4) conical teeth, aligned and similar in size; ascending process wide and square shaped. Maxilla toothless, wide, arched, with distal tip reaching or surpassing vertical line projected through orbit anterior edge. Dentary with 4(2), 5(8), 6(13), 7(4), 8(2) or 10(2) aligned teeth; teeth conical, rarely bicuspid; four medial teeth larger with similar size, following teeth smaller decreasing in size laterally ( Fig. 2 View Fig ).

Dorsal-fin origin slightly posterior to vertical through middle of standard length. Dorsal-fin rays ii,8-10 (mean = 9.0, n = 120). Adipose-fin origin at vertical line through last analfin ray insertion.Anal-fin origin slightly anterior to last dorsal- fin ray insertion; anterior rays longer than posterior ones; distal profile more convex on females than on males. Anal-fin rays iii-v,17-22 (mean = 23.8, n = 121); last unbranched up to nineth anal-fin branched ray of mature or maturing males bearing small retrorse hooks ( Fig. 3 View Fig ). Hooks placed from middle length to near the distal tip of anal-fin rays, attached at posterior margin and usually posterior branch in branched portion, bent over lateral surface, and directed anteriorly to anal-fin frontal margin. One or two hooks per anal-fin ray segment. Pectoral-fin rays i,10-12 (mean = 10.6, n = 121); longest rays surpassing pelvic-fin insertion. Pelvic-fin insertion anterior to vertical line through dorsal-fin origin. Pelvic-fin rays i,7; all of them bearing 1-2 unilateral ventromedial antrorse hooks per segment on mature males. Caudal fin with 18-20 (mean = 19.0, n = 121) principal rays. Principal caudalfin rays 12 th and 13 th bearing recurved strong hooks anteriorly directed on branched portions, usually dorsally; principal caudal-fin rays 14 th to 18 th bearing posteriorly directed feeble spinelets along proximal portion, and anteriorly directed bony hooks along mid- and distal portions of fin rays on mature males ( Fig. 4 View Fig ).

Lateral line incomplete, with 3-8 (mean = 6.1, n = 91) perforated scales. Total scales at lateral line series 30-37 (mean = 33.6, n = 120) scales. Scale rows between dorsal-fin insertion and lateral line 5; scale rows between lateral line and pelvicfin insertion 2-4 (mean = 3.2, n = 121). Predorsal scales 10-16 (mean = 12.9, n = 119); postdorsal scales 7-10 (mean = 8.2, n = 121); scales rows around caudal peduncle 12-14 (mean = 13.8, n = 121). Last scales of lateral scale rows with higher radii number on adult males than other body scales. Last scale of scale row below lateral line larger and posteriorly hypertrophied on mature males, with distal margin reaching or slightly overlapping most proximal caudal-fin ray spinelets ( Figs. 5-6 View Fig View Fig ).

Mature males with gill gland on first branchial arch ( Fig. 7 View Fig ). Gill rakers of first branchial arch 1.5 times longer than rakers from remaining branchial arches, not bearing denticles, 3(2), 4(2) on hypobranchial, 13(3), 14(1) on ceratobranchial, 7(4) on epibranchial. Supraneurals 4(1), 5(15), 6(74), 7(115), 8(28), 9(2). Total vertebrae 29(1), 30(35), 31(179), 32(35). Precaudal vertebrae 12(4), 13(227), 14(20).

Pseudotympanum as large muscular hiatus between first and second pleural ribs, limited dorsally by the lateralis superficialis muscle, posteriorly by naked anterior face of second pleural rib, posteroventrally by obliquus inferioris muscle, anteroventrally by obliquus superioris muscle.

Color in alcohol. Overall body color varying from light yellow in fresh preserved specimens to pale brownish on old preserved specimens ( Fig. 1a,c View Fig ). Head black to dark brown dorsally. Region of infraorbitals 3-5 and opercular apparatus silver on freshly preserved specimens and yellow on older ones. Dark melanophores surround nares, lips, and anterior margin of orbit. Mental region dark due to high concentration of melanophores. Humeral spot absent. Dorsal and dorsolateral portion of body with melanophores distributed

F. C. Jerep & L. R. Malabarba 305

at posterior margin of the scales. Thin dark line extending laterally on body, from posterior region of pseudotympanum to caudal spot. Posterior portion of this line sometimes silver. Caudal region with few melanophores distributed in oblique lines along myoseptum of epaxialis and hypaxialis muscles. Ventral region with higher concentration of melanophores around pelvic-fin insertion in mature males. All fins hyaline with scattered melanophores, except dorsal fin with a small elongated spot between distal tip of first unbranched ray and midpoint of second unbranched ray.Anal fin with an elongated small spot at base of unbranched anal-fin rays. Males with higher concentration of melanophores at distal margin of anal fin than females. Caudal spot round, not reaching dorsal and ventral margins of caudal peduncle, and not extending over middle caudal-fin rays; not conspicuous on some specimens.

Color in life. Overall body and head color pattern silver to white ( Fig. 1b View Fig ). Lateral body band silver.All the fins are hyaline with few scattered melanophores, and a small dark spot present at the dorsal and anal fin as described above.

Sexual dimorphism. Mature males can be differentiated from adult females by the presence hooks on pelvic, anal and caudal-fin rays ( Figs. 3-5 View Fig View Fig View Fig ). Males also present the the gill filaments from the first branchial developed into a gill gland ( Fig. 7 View Fig ), due to the fusion of adjacent gill filaments by expansion of the epithelium that covers it ( Azevedo et al., 2010). The last scale of the scale row below the lateral line is also larger and more developed in males than females ( Fig. 6b View Fig ). Although the females also present a homologous scale relatively large when compared to other cheirodontine species, it is still smaller than that observed in males. Mature males also have a higher number of melanophores at the distal portion of the anal-fin rays forming a tenuous dark band along the distal margin of the anal fin that it is not seen in females. The ventral profile of the anal fin also differs between males and females, being less concave on males.

Habitat and ecological notes. Macropsobrycon uruguayanae   is usually found in natural flooded ponds and/or small lagoons with direct and active connection to rivers or streams. This kind of habitat is strongly affected along the area of distribution of this species by its extensive use to rice cultivation. The species is inseminating with reproductive biology described in detail by Azevedo et al. (2010).

Distribution and geographical variation. Records of Macropsobrycon uruguayanae   are known from Rio Grande do Sul State in southern of Brazil, Província de Entre Ríos in Argentina (Demonte & Arias, 2005; Miquelarena et al., 2008), and Uruguay. Its geographical distribution encompasses the rio Uruguay basin, rio Negro basin (large tributary of the lower rio Uruguay), and laguna dos Patos drainage ( Fig. 8 View Fig ).

The PCA analysis provided some morphological differences among the populations from the three studied drainages. The principal component 1 represented 72.5% of the variance, however it was found a correlation of 0.96 between its scores and the standard length values, showing to be most affected by the size. The second and third principal component represented respectively 6.2% and 4.7% of the variance. The principal component 2 showed a trend of separation between the specimens from rio Negro and from rio Uruguay basins. The individuals from rio Negro presented relatively smaller snout length and trends to bigger horizontal orbit diameter than the rio Uruguay representatives. Morphological differences between Macropsobrycon uruguayanae   from laguna dos Patos basin and rio Negro basin were evidenced by the principal component 3. The laguna dos Patos basin specimens presented somewhat larger caudal peduncle length and upper jaw length, and relatively smaller anal-fin base length than specimens from rio Uruguay basin (Fig. 9). The MANOVA analysis of the PC2 and PC3 scores did not succeed in discrimitating the three populations.

Material analyzed: Macropsobrycon uruguayanae   . Type material. Holotype: FMNH 57910 View Materials , 36.0 mm SL, Brazil, Cacequy , 1 Feb 1909, J. D. Haseman   . Paratypes: FMNH 57911 View Materials , 4 View Materials , 14.4-35.5 mm SL, Brazil, Cacequy , 1 Feb 1909, J. D. Haseman   . FMNH 57912 View Materials , 21.3 mm SL, Brazil, Cacequy , 5 Feb 1909, J. D. Haseman. Nontype material. Laguna dos Patos system, Brazil, Rio Grande do Sul   : MCP 8421 View Materials , 1 View Materials (m, male, 34.7 mm SL), arroio Capané at bridge on BR 290, tributary of rio Jacuí , 24 Oct 1982, C.A. S. Lucena & L. R. Malabarba   . MCP 9245 View Materials , 6 View Materials (2m, males, 34.8-40.6 mm SL, 3, unsexed, 39.2-40.8 mm SL, 1 c&s, 32.4 mm SL), backwater of rio Jacuí , road between Santa Maria and Vera Cruz, 16 Sep 1983, C. A. S. Lucena, L. R. Malabarba & R. E. Reis   . MCP 11997 View Materials , 11 View Materials (4m, males, 32.4- 39.8 mm SL, 6m, females, 31.1-39.2 mm SL, 1, unsexed, 30.9 mm SL, 1 c&s, female, 32.4 mm SL), arroio Francisquinho on highway BR 290 between Butiá and Rio Pardo , rio Jacuí basin, 24 Oct 1982, C. A. S. Lucena & L. R. Malabarba   . MCP 19410 View Materials , 1 View Materials (unsexed, 22.3 mm SL), lakes on left margin of rio Jacuí, at bridge on road connecting BR 290 to Cachoeira do Sulpicaré , 22 Jan 1996, L. R. Malabarba, J. R. Burns & J. F. Pezzi   . MCP 20900 View Materials , 87 View Materials (6m, males, 29.3-33.0 mm SL, 2m, females, 35.5-39.6 mm SL, 66, unsexed, 10.5-36.6 mm SL, 6 c&s, males, 24.6-34.2 mm SL, 2 c&s, females 33.2-35.1 mm SL, 1 c&s, unsexed, 23.4 mm SL), stream on rio Jacuí basin, at bridge on road between São Gabriel and Tiarajupuçá, 14 Jan 1997, L. R. Malabarba, J. Alves Gomes & V. Bertaco   . MCP 37579 View Materials , 2 View Materials (1m, male, 36.1 mm SL, 1m, female, 33.7 mm SL), Taim, Lago do Nicola , Jun 2004, A. Garcia   . UFRGS 2244 View Materials , 3 View Materials (unsexed, 22.9-24.7 mm SL) Rio Grande, Estação Ecológica do Taim , 8 May 1981, R. E. Reis & J. R. Stehmann   . UFRGS 2245 View Materials , 2 View Materials (1m, female, 34.0, 1, unsexed, 33.2 mm SL), between Taim and Mirim, channel parallel to BR 471 near a pump building in Estação Ecológica do Taim , 21 Apr 1979, L. Jardim & L. Chomenko   . UFRGS 2306 View Materials , 5 View Materials m (females, 30.7-36.4 mm SL), between Rio Grande and Mirim, right margin of BR 471 on Arroio Taim road, Estação Ecológica do Taim , 7 Dec 1979, N. A. Menezes et al   . UFRGS 2307 View Materials , 3 View Materials m (females, 33.0- 35.2 mm SL), same locality as UFRGS 2306, 7 Jul 1979, P. A. Buckup   . UFRGS 5604 View Materials , 5 View Materials (4m, males, 34.2-35.4 mm SL, 1m, female, 34.0 mm SL), Barra do Ribeiro, arroio Ribeiro, bridge on road to Barra do Ribeiro , 19 Oct 1999   . USNM 268449 View Materials , 3 View Materials (2m, males, 31.3-32.0 mm SL, 1m, female, 37.3 mm SL), arroio Sarandi at stream under road crossing on road between Pelotas and Jaguarão, tributary of lago Mirim North of arroio Grande , 14 Dec 1972, N. A. Menezes et al. Rio Negro   basin, Brazil, Rio Grande do Sul   : MCP 11932 View Materials , 1 View Materials (unsexed, F i g. 9. P r i n c i p a l Co m p o n e n t An a l y s i s (PCA) o f Macropsobrycon uruguayanae   from three different basins: laguna dos Patos basin (dots), rio Uruguay basin (filled triangles), and rio Negro basin (empty triangles); based on the 18 morphometric variables listed in Table 1, except dorsal-fin length. Ellipses correspond to 95% confidence ellipses. The largest loadings are indicated on the second and third principal components (PC2, PC3), where AbL = anal-fin base length; HOD = horizontal orbit diameter; LCP = length of caudal-peduncle; SnL = snout length; UJL = upper jaw length.  

25.4 mm SL), Bagé, arroio on BR 153 km 33 between Bagé and Aceguá, 25 Oct 1982, C. A. S. Lucena & L. R. Malabarba. MCP 11938 View Materials , 6 View Materials (3m, males, 28.0- 28.6 mm SL, 1m, female, 31.0 mm SL, 2, unsexed, 19.5-23.4 mm SL) rio Negro   , bridge on highway BR 293, between Bagé and Aceguá , 25 Oct 1982, C. A. S. Lucena, L. R. Malabarba   . UFRGS 8383 View Materials , 2 View Materials (1m, female, 38.9 mm SL, 1, unsexed, 25.5 mm SL) Bagé , sanga Cinco Salsos, BR 153 between Aceguá and Bagé, 29 Mar 2006, L. R. Malabarba et al   . UFRGS 8430 View Materials , 18 View Materials (8m, males, 30.6-32.4 mm SL, 3m, females, 28.2-34.8 mm SL, 5, unsexed, 28.2-31.3 mm SL, 1 c&s, male, 31.3 mm SL), Bagé , rio Negro   on highway BR 153 between Aceguá and Bagé , 29 Mar 2006, L. R. Malabarba et al. Uruguay, Cerro Largo   : ANSP 168826 View Materials , 20 View Materials (20.5-34.5 mm SL), Uruguay, Depto. Cerro Largo   , pool at 10 m of rio Negro   , Arreria , 19 may 1984, C. A. S. Lucena & C. Chagas   . MCP 11936 View Materials , 120 View Materials (8m, males, 31.6-35.5 mm SL, 13m, females, 28.7-35.7 mm SL, 92, unsexed, 22.9-32.4 mm SL, 4 c&s, males, 30.2-31.4 mm SL, 5 c&s, females, 30.0- 31.7 mm SL, 4 c&s, unsexed, 21.5-25.6 mm SL), same data as ANSP 168826. Uruguay, Rivera   : UFRGS 7277 View Materials , 2 View Materials (1m, male, 31.2 mm SL, 1m, female, 39.3 mm SL), rio Negro   en el puente sobre la ruta 44, paso de Manzaneano , haci la ruta 26, 27 May 2005, L. R. Malabarba, V.A. Bertaco, P. Lehmann & F. Cantina. Uruguay, Rio Negro   : UFRGS 7421 View Materials , 1 View Materials (m, female, 39.3 mm SL), on bridge in Pasos del Toros , rio Negro   , 28 May 2005, L. R. Malabarba, V. A. Bertaco, P. Lehmann & F. Cantuna. Rio Uruguay basin, Brazil, Rio Grande do Sul   : MCP 11810 View Materials , 1 View Materials (unsexed, 20.9 mm SL), rio Uruguay, 10 Nov 1987, J. Bertoletti, C. Lucena, E. Lerner & P. Azevedo   . MCP 11921 View Materials , 4 View Materials (unsexed, 17.9- 20.4 mm SL), rio Ibicuí-Mirim at rio Toropi mouth, 3 Jan 1983, UFSM   . MCP 11922 View Materials , 4 View Materials (unsexed, 18.9-22.5 mm SL), rio Ibicuí- Mirim at mouth on rio Santa Maria , 14 Jan 1983, UFSM   . MCP 11923 View Materials , 3 View Materials (unsexed, 24.1-36.7 mm SL), rio Ibicuí-Mirim on rio Toropi mouth, 3 Jan 1983, UFSM   . MCP 11924 View Materials , 1 View Materials (unsexed, 22.8 mm SL), rio Santa Maria , 26 Oct 1982, C. A. S. Lucena & L. R. Malabarba   . MCP 11925 View Materials , 3 View Materials (unsexed, 32.7-35.1 mm SL), rio Ibicuí-Mirim on rio Santa Maria mouth, 14 Jan 1983, UFSM ( Universidade Federal de Santa Maria )   . MCP 11926 View Materials , 7 View Materials (6m, males, 28.4-32.2 mm SL, 1m, female, 32.2 mm SL), São Francisco de Assis, rio Jaguari , 15 Sep 1983, C. A. S. Lucena, L. R. Malabarba & R. E. Reis   . MCP 11927 View Materials , 11 View Materials (unsexed, 24.6-35.9 mm SL), rio Ibicuí-Mirim, at road connecting Santa Maria to São Pedro , at 20 km far from Santa Maria , 20 Mar 1982, UFSM   . MCP 11928 View Materials , 36 View Materials (unsexed, 21.2-35.3 mm SL), rio Santa Maria, at BR 293, km 246, section Dom Pedrito / Santana do Livramento , 26 Oct 1982, C. A. S. Lucena & L. R. Malabarba   . MCP 11929 View Materials , 16 View Materials (5m, males, 31.2-33.6 mm SL, 2m, females, 31.5-31.9 mm SL, 9, unsexed, 30.6-33.26 mm SL), sanga on road Santa Maria / Mata , 13 Sep 1983, C. A. S. Lucena, L. R. Malabarba & R. E. Reis   . MCP 11930 View Materials , 10 View Materials (unsexed, 25.5-32.0 mm SL), Ponto 2, 8 Apr 1983, UFSM   . MCP 11931 View Materials , 51 View Materials (unsexed, 21.4-33.5 mm SL), rio Santa Maria on BR 293, km 246, section Dom Pedrito / Santana do Livramento , 26 Oct 1982, C. A. S. Lucena & L. R. Malabarba   . MCP 11933 View Materials , 1 View Materials (unsexed, 27.6 mm SL), rio Santa Maria, on BR 293, km 246, section Dom Pedrito / Santana do Livramento , 26 Oct 1982, C. A. S. Lucena & L. R. Malabarba   . MCP 11934 View Materials , 5 View Materials (unsexed, 26.1- 34.4 mm SL), rio Ibicuí-Mirim , 10 Jun 1986, UFSM   . MCP 11935 View Materials , 6 View Materials (unsexed, 24.0- 25.9 mm SL), Itaqui, mouth of rio Ibicuí at rio Uruguai, 19 Nov 1984, L. R. Malabarba & R. E. Reis   . MCP 11937 View Materials , 208 View Materials (6m, males, 31.8-33.9 mm SL, 7m, females, 29.6-34.4 mm SL, 191, unsexed, 21.8-34.4 mm SL, 4 c&s, males, 27.8-32.8 mm SL), rio Santa Maria on BR 293, km 246, section Dom Pedrito / Santana do Livramento , 26 Oct 1982, C. A. S. Lucena & L. R. Malabarba   . MCP 11939 View Materials , 223 View Materials (219, unsexed, 21.4-34.8 mm SL, 1 c&s, male, 30.1 mm SL, 3 c&s, females, 32.4-35.1 mm SL), rio Santa Maria on BR 293, km 246, section Dom Pedrito / Santana do Livramento , 26 Oct 1982, C. A. S. Lucena & L. R. Malabarba   . MCP 11998 View Materials , 6 View Materials (1, males, 38.0 mm SL, 5, females, 36.5-44.6 mm SL), Santa Maria, pools on margin of rio Vacacai , 12 Sep 1983, C. A. S. Lucena, L. R. Malabarba & R. E. Reis   . MCP 14158 View Materials , 4 View Materials (2, unsexed, 37.6-39.5 mm SL), arroio Santo Antonio, at road Rosário do Sul   / Santana do Livramento , 13 Dec 1989, C. Weber, R. E. Reis & S. Muller   . MCP 14205 View Materials , 1 View Materials (unsexed, 34.5 mm SL), pools on margin of rio Santa Maria, road Dom Pedrito / Santana do Livramento , 14 Dec 1989, C. Weber, R. E. Reis & S. Muller   . MCP 15336 View Materials , 7 View Materials (unsexed, 26.2-28.4 mm SL), Uruguaiana , affluent of rio Uruguay at PUC, 26 Feb 1991, E. Q. Chiva   . MCP 16393 View Materials , 2 View Materials (unsexed, 21.0- 26.2 mm SL), São Marcos , marginal lake on Formosa beach, affluent of rio Uruguay, 11 Dec 1992, P. H. Wimberger, R. E. Reis & J. F. Pezzi   . MCP 16399 View Materials , 12 View Materials (unsexed, 20.9-28.8 mm SL), São Marcos , marginal lake on Formosa beach, affluent of rio Uruguay, 11 Dec 1992, P. H. Wimberger, R. E. Reis & J. F. Pezzi   . MCP 18365 View Materials , 86 View Materials (1m, male, 32.8 mm SL, 6m, females, 33.0- 34.7 mm SL, 77, unsexed, 13.5-34.6 mm SL, 2 c&s, females, 29.7-35.2 mm SL), São Marcos , marginal lake on Formosa beach, affluent of rio Uruguay, 21 Nov 1995, J. F. Pezzi, W. Santos, V. Bertaco & C. Kohlmann   . MCP 19602 View Materials , 1 View Materials (unsexed, 27.7 mm SL), pool near Olaria on low land along side rio Santa Maria , BR 290, 15 Jan 1997, L. R. Malabarba, J. Alves Gomes & V. Bertaco   . MCP 23660 View Materials , 7 View Materials (2m, males, 31.3-31.6 mm SL, 4m, females, 30.2-32.7 mm SL, 1, unsexed, 28.0 mm SL), Uruguaiana, Sanchuri dam, 21 Jul 1999, R. C. Beheregaray   . MCP 40723 View Materials , 1 View Materials (unsexed, 20.9 mm SL), rio Touro Passo , 17 Oct 1985, C. A. S. Lucena, C. Mardini & C. Porto   .

MCP

Pontificia Universidade Catolica do Rio Grande do Sul

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Characiformes

Family

Characidae

Genus

Macropsobrycon

Loc

Macropsobrycon uruguayanae Eigenmann, 1915

Jerep, Fernando C. & Malabarba, Luiz R. 2011
2011
Loc

Macropsobrycon uruguayanae

Javonillo, R & Malabarba, S 2010: 505
Azevedo, M 2010: 87
Oliveira, C & Burns, L 2008: 691
Buhrnheim, C & Carvalho, L 2008: 671
Miquelarena, A 2008: 78
Malabarba, L 2007: 37
Pecio, A 2007: 458
Malabarba, L 2004: 324
Quagio-Grassiotto, I., M 2003: 41
Malabarba, L 1998: 218
Burns, J & Weitzman, K 1998: 242
Burns, J 1997: 434
Gery, J 1977: 594
Gery, J 1973: 108
Gery, J 1972: 15
Eigenmann, C 1915: 48
1915