Neotropical Ichthyology, 7(2):199-204, 2009
Copyright © 2009 Sociedade Brasileira de Ictiologia
A new Tatia (Ostariophysi: Siluriformes: Auchenipteridae) from the rio
Iguaçu basin, Paraná State, Brazil
Carla Simone Pavanelli1 and Alessandro Gasparetto Bifi2
A new species of Tatia is described from the lower rio Iguaçu basin, Paraná State, Brazil. The new species is distinguishable
from congeners by having large, irregular pale blotches over dark brown base coloration, absent longitudinal stripe, caudal fin
with round to striate dark brown spots over light base in adults or entirely dark in juveniles, and by having a long humeral
process. Sexual dimorphism of the new species is marked by differences among genital and urinary apertures, size proportions
between upper and lower lobe of caudal fin, and size, width and presence of antrorse and retrorse spines on anal-fin rays.
Uma nova espécie de Tatia é descrita da bacia do baixo rio Iguaçu, Estado do Paraná, Brasil. A nova espécie é diagnosticada
de suas congêneres por apresentar grandes manchas claras e irregulares sobre um fundo marrom escuro, faixa longitudinal
ausente, nadadeira caudal com manchas arredondadas a estrias marrons escuras sobre uma base clara nos adultos ou
completamente negra nos jovens, e por apresentar o processo umeral longo. O dimorfismo sexual da nova espécie é marcado
por diferenças entre as aberturas genitais e urinárias, proporções de tamanho entre o lobo superior e inferior da nadadeira
caudal e tamanho, largura e presença de espinhos antrorsos e retrorsos nos raios da nadadeira anal.
Key words: Neotropical, Freshwater fish, Sexual dimorphism, Catfish.
Introduction
The genus Tatia was proposed by Miranda-Ribeiro (1911)
who included two species: T. intermedia (Steindachner) and
T. aulopygia (Kner). Recently Sarmento-Soares & MartinsPinheiro (2008) diagnosed Tatia among the Centromochlinae
by having the hyomandibula anterodorsally elongated, not
contacting the narrow metapterygoid and, instead, connected
to the trapezoidal quadrate, reduced anal-fin base in adult
males, and compressed and deep caudal peduncle, with a
middorsal keel posterior to adipose fin. Those authors also
recognized 12 valid species widespread in cis-Andean South
American basins.
Previous inventories in the rio Iguaçu basin (e.g. Garavello
et al., 1997; Ingenito et al., 2004; Baumgartner et al., 2006)
have recorded only two species of Centromochlinae,
Glanidium ribeiroi Haseman, and a new species of Tatia.
Many Tatia specimens also have been collected during
frequent samples in the lower rio Iguaçu basin over the last
few decades by the Núcleo de Pesquisas em Limnologia,
Ictiologia e Aqüicultura (Nupélia), of the Universidade
Estadual de Maringá. Tatia neivai has been recorded from
the whole Paraná-Paraguay system, except the Iguaçu basin,
where occurs a different and undescribed species referable
to the genus Tatia (sensu Sarmento-Soares & MartinsPinheiro, 2008). This species exhibits a unique color pattern
among congeners and it is described herein as a new Tatia.
Material and Methods
Counts follow Soares-Porto (1995) and measurements
Sarmento-Soares & Buckup (2005) with the latter made on the
left side of the specimens whenever possible, with calipers to
the nearest 0.1 mm. Measurements of the subunits of the
head are presented as percent of head length (HL) and those
related to the body, including HL and subunits of the body as
percent of standard length (SL). Meristic data included
vertebrae, caudal-fin and procurrent rays which were taken
from six male and six female specimens cleared and stained
(c&s) according to procedures of Taylor & Van Dyke (1985).
Five males and two females were also radiographed for helping
osteological analyses. Vertebrae counts follow SarmentoSoares & Martins-Pinheiro (2008). Counts from the holotype
1
Nupélia, Universidade Estadual de Maringá, Av. Colombo, 5790, 87020-900 Maringá, PR, Brazil. carlasp@nupelia.uem.br
Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá, Av. Colombo, 5790,
87020-900 Maringá, PR, Brazil. agbifi@hotmail.com
2
199
A new Tatia from the rio Iguaçu basin
200
are indicated by an asterisk. Material is listed informing, in
parentheses, the number of specimens in the lot from which
counts and measurements were taken if that number is less
than the total number of specimens in the lot, and their range
of SL. Institutional abbreviations are CZCEN, Colección
Zoológica de la Facultad de Ciencias Exactas y Naturales,
Universidad Nacional de Asunción, DZSJRP, Departamento
de Zoologia e Botânica, São José do Rio Preto, MNRJ, Museu
Nacional, Rio de Janeiro, MZUEL, Museu de Zoologia da
Universidade Estadual de Londrina, MZUSP, Museu de
Zoologia da Universidade de São Paulo, NUP, Coleção
Ictiológica do Nupélia, Maringá, besides collectors Copel,
Companhia Paranense de Energia, and Gerpel, Grupo de
Pesquisas em Recursos Pesqueiros e Limnologia.
Tatia jaracatia, new species
Figs. 1-3
Tatia sp. Luiz et al., 2005: 183 (checklist, Paraná State, Brazil).—
Baumgartner et al., 2006: 2 (checklist, Salto Osório
Reservoir, lower rio Iguaçu basin, Brazil).
Holotype. MZUSP 98248, male, 65.7 mm SL, Brazil, Paraná State,
Municípios de Salto do Lontra and Dois Vizinhos, lower rio Iguaçu
basin, rio Jaracatiá, 25º38’17”S 53º17’04”W, 25 Nov 1998, Nupélia
staff.
Paratypes. All lots from Brazil, Paraná State, lower rio Iguaçu
basin, collector Nupélia staff (unless otherwise stated). Municípios
de Boa Esperança do Iguaçu and Nova Prata do Iguaçu, rio Jaracatiá,
25o37’37”S 53o16’52”W: MZUSP 98249, 2, 46.5-48.0 mm SL, 8
Aug 1997; NUP 4936, 4, 38.1-46.0 mm SL (1, 46.0 mm SL), 24
Nov 1998; NUP 4937, 1, 50.8 mm SL, 25 Jan 1999; NUP 5327, 1
c&s, 46.9 mm SL, 25 Jan 1999; NUP 5329, 3 c&s, 44.3-51.8 mm
SL, 24 Nov 1998. Municípios de Boa Vista da Aparecida and Três
Barras do Paraná, rio Tormenta, 25o25’23”S 53o21’09”W: NUP
4958, 3, 31.4-58.5 mm SL (1, 51.6 mm SL), 19 Jan 1999. Municípios
de Capitão Leônidas Marques and Realeza (Marmelândia), Salto
Caxias Reservoir, upstream from the dam, 25o31’55”S 53o29’01”W:
MNRJ 31909, 1, 42.9 mm SL, 21 Jan 1999; MZUSP 98250, 2,
51.5-55.6 mm SL, 5 and 6 Feb 1998; MZUSP 98251, 1, 52.2 mm
SL, 21 Jan 1999; MZUSP 98252, 1, 45.4 mm SL, 3 Feb 2001;
MZUSP 98253, 1, 63.0 mm SL, 6 Mar 2000; NUP 4947, 2, 44.066.3 mm SL (1, 66.3 mm SL), 5 and 6 Jun 1997; NUP 4948, 2, 47.549.4 mm SL (1, 49.4 mm SL), 28 Jun 2000; NUP 4950, 2, 60.3-72.2
mm SL, 5 and 6 Feb 1998; NUP 4951, 1, 49.4 mm SL, 21 Jan 1999;
NUP 4959, 2, 62.8-64.4 mm SL, 4 Apr 1997; NUP 5330, 6 c&s,
40.0-52.2 mm SL, 21 Jan 1999. Municípios de Capitão Leônidas
Marques and Realeza (Marmelândia), Salto Caxias Reservoir,
downstream from the dam, 25o31’55”S 53o29’01”W: NUP 4957, 1,
63.5 mm SL, 17 Dec 1998. Município de Cruzeiro do Iguaçu, rio
Chopim, 25º34’27”S 53º05’49”W: MZUSP 98254, 1, 27.4 mm SL,
27 Nov 1999. Município de Quedas do Iguaçu, Salto Osório
Reservoir, 25o30’-25o37’S 52o43’-53o01’W: NUP 2654, 4, 49.353.1 mm SL, Jun 2001, Copel staff; NUP 3243, 5, 42.7-56.8 mm
SL, 7 Nov 2003, Gerpel staff; NUP 4175, 1, 54.0 mm SL, 9 Dec
2003, Gerpel staff; NUP 4176, 1, 48.9 mm SL, 25 o30’49”S
53o00’049”W, 5 Dec 2004, Gerpel. Município de Realeza, rio
Cotejipe, 25o34’35”S 53o30’06”W: NUP 4956, 1, 55.3 mm SL, 16
Dec 1998. Municípios de Salto do Lontra and Dois Vizinhos, rio
Jaracatiá, 25o38’17”S 53o17’04”W: MNRJ 31910, 1, 57.0 mm SL,
13 Feb 1997; NUP 4931, 1, 57.5 mm SL, 11 Mar 1997; NUP 4932,
1, 56.2 mm SL, 8 Oct 1997; NUP 4933, 2, 51.8-53.9 mm SL (1, 53.9
mm SL), 25 Nov 1998. Município de Três Barras do Paraná, rio
Adelaide, 25o27’18”S 53o18’26”W: MNRJ 31912, 1, 54.1 mm SL,
20 Nov 1998; NUP 4954, 4, 54.8-58.7 mm SL (1, 57.0 mm SL), 20
Nov 1998; NUP 4955, 1, 52.2 mm SL, 13 Dec 1998; NUP 5328, 1
c&s, 49.7 mm SL, 20 Nov 1998. Municípios de Três Barras do
Paraná and Nova Prata do Iguaçu, rio Iguaçu, close to Porto Vorá,
25o32’24”S 53o18’08”W: MNRJ 31511, 2 ex., 51.2-54.2 mm SL,
10 Jan 1998; NUP 4953,1, 45.9, 6 Mar 2000; NUP 5326, 1 c&s,
43.2 mm SL, 10 Jan 1998.
Non-measured paratypes. All lots from Brazil, Paraná State, lower
rio Iguaçu basin, collector Nupélia staff. Municípios de Boa
Esperança do Iguaçu and Nova Prata do Iguaçu, rio Jaracatiá,
25o37’37”S 53o16’52”W: NUP 1630, 2, 41.8-52.1 mm SL, 4 Oct
2000; NUP 4935, 1, 42.8 mm SL, 7 Jan 2001. Municípios de Capitão
Leônidas Marques and Realeza, Salto Caxias Reservoir, 25o31’55”S
53o29’01”W: NUP 4986, 1, 52.2 mm SL, 1 Nov 2002, Copel staff;
NUP 4987, 3, 48.8-56.1 mm SL, Feb 1997 to Jan 2000. Municípios
de Capitão Leônidas Marques and Realeza (Marmelândia), Salto
Caxias Reservoir, upstream from the dam, 25o31’55”S 53o29’01”W:
NUP 4946, 1, 38.0 mm SL, 3 Oct 2000. Município de Cruzeiro do
Iguaçu, rio Chopim, 25º34’27”S 53º05’49”W: NUP 1743, 1, 37.9
mm SL, 25 Nov 2000; NUP 1799, 6, 28.2-31.5 mm SL, 27 Nov
1999. Municípios de Três Barras do Paraná and Nova Prata do
Iguaçu, rio Iguaçu, close to Porto Vorá, 25o32’24”S 53o18’08”W:
NUP 707, 10, 35.2-48.0 mm SL, 10 Jan 1998; NUP 4952,1, 47.3
mm SL, 3 Nov 2000. Município de São Jorge do Oeste, Salto Osório
Reservoir, 25o36’28”S 52o52’45”W: NUP 4988, 1, 55.1 mm SL, 22
Nov 2006, Gerpel staff.
Diagnosis. Tatia jaracatia can be distinguished from its
congeners, except T. aulopygia, T. brunnea, T. dunni, T.
galaxias, T. intermedia, and T. neivai, by having large pale
blotches over a dark brown base coloration (vs. body with
dark brown blotches or more or less uniformly dark in T. boemia,
T. caxiuanensis, T. meesi, T. nigra, dark brown base with pale
stripes in T. strigata, and body with dark brown midlateral
stripe in T. gyrina). Tatia jaracatia can be distinguished from
T. aulopygia by having anal-fin rays of mature males uniformly
decreasing in size from third unbranched ray (vs. anal fin of
mature males distinctly notched). Tatia jaracatia have large
and irregular pale dots over a dark brown base (vs. regular,
longitudinally elongated or roundish, and very small in T.
galaxias and T. neivai, and longitudinally more elongate pale
blotches in T. dunni). Moreover, juvenile individuals of T.
jaracatia possess uniformly dark brown caudal fin (vs. caudal
fin uniformly pale, dotted or striped in T. aulopygia, T.
intermedia and T. neivai). Furthermore T. jaracatia have 31
or 32 post-Weberian vertebrae (vs. more than 35 in T.
aulopygia, T. dunni and T. intermedia) and 9 or 10 ribs (vs. 7
in T. galaxias). Some specimens of T. jaracatia have brown
caudal-fin dots arranged as stripes, which might be confused
with pale striae to roundish dots on caudal fins of some T.
neivai. However, T. jaracatia has three to five (mode = 4, n =
C. S. Pavanelli & A. G. Bifi
201
Fig. 1. (a) Tatia jaracatia, holotype, MZUSP 98248, male, 65.7 mm SL; (b) Tatia jaracatia, paratype, NUP 4933, male, 52.6 mm
SL; (c) Tatia jaracatia, NUP 1799, juvenile, 31.5 mm SL.
11) hemal spines with thicker distal portion, while T. neivai
has two or three (mode = 2, n = 3), in addition to different
color pattern of body above mentioned. Tatia jaracatia can
be diagnosed from T. intermedia by presenting caudal fin
uniformly dark brown or with several dark brown
chromatophores irregularly widespread, forming roundish
blotches, and rarely forming stripes, and the humeral process
long, reaching or surpassing the vertical line through origin
of dorsal fin (vs. caudal fin with the same color pattern of the
body, and humeral process shorter, not reaching that line).
Description. Morphometric data are presented in Table 1.
Body elongated and head slightly depressed. Dorsal profile
of body slightly convex from snout tip to adipose fin and
A new Tatia from the rio Iguaçu basin
202
somewhat concave on the anterior half of the caudal peduncle,
then convex to the caudal-fin rays. Ventral profile of body
faintly convex from mandibulary symphysis to pelvic fin and
slightly concave from this point to caudal peduncle.
Thin integument over dorsal portion of head, allowing
discernible skull roof. Fontanel elliptical and narrow,
surrounded by frontals and entering mesethmoid. Third nuchal
plate projecting laterally. Mouth terminal, slightly
prognathous, possessing three irregular rows of conic
premaxillary and dentary teeth. Maxillary barbel occasionally
surpassing tip of humeral process. Inner mental barbel on the
average approximately 70% of the length of outer mental
barbel. Lateral line complete and inconspicuous, more
perceptible in juveniles and c&s specimens.
Dorsal-fin rays I,5* (n = 40); dorsal-fin spine with 11 to 18
(15*, mode = 16, n = 33) serrations distributed along anterior
edge. Pectoral-fin rays I,4* (n = 41), pectoral-fin spine with 13
to 27 (23*, mode = 22, n = 36) antrorse serrations along anterior
edge and 9 to 18 (18*, mode = 16, n = 36) retrorse serrations
along posterior edge. Pelvic-fin rays i,5* (n = 43), with second
branched ray longest. In males, anal-fin rays iii,6* (n = 18);
females ii,7 (n = 23). Forked caudal-fin rays i,7/8,i* (n = 16)
and 16 to 20 (mode = 17, n = 14) upper procurrent rays and 15
to 19 (mode = 16, n = 14) lower. Post-Weberian vertebrae 31 (n
= 7) or 32 (n = 9), and nine (n = 16) or ten (n = 1) pairs of ribs;
last vertebra with vestigial ribs preceded by one without ribs.
Color in alcohol. Base color of dorsal and lateral surfaces of
head and trunk ranging from light to dark brown; base color
of ventral region of head and trunk white, lacking dark
chromatophores. Lateral surface of body having pattern of
pale blotches ranging from large to small, round to oval, and
arranged longitudinally, transversally, or non-uniformly (Fig.
1). Dorsal fin generally hyaline, with scattered dark
chromatophores on central or distal portion of first and second
branched rays. Pectoral fin hyaline. Pelvic and anal fins
hyaline, darkly colored only close to the base. Caudal fin
ranging from uniformly dark brown, chiefly in juveniles (Fig.
1c), to having brown asymmetrical or oval blotches, or also
with diffuse dark chromatophores irregularly arranged,
occasionally forming stripes.
Sexual dimorphism. Adult females of Tatia jaracatia have
genital and urinary apertures separate, but very close
together; and proximal radials of anal fin not fused. Adult
males have genital and urinary openings separate as well, but
the former is close to the first anal-fin ray origin, and the latter
is at vertical line through pelvic-fin tip; upper lobe of caudal
fin longer than inferior; three to five* hemal spines above
proximal radials distally thicker; first unbranched anal-fin ray
reaching about a half length of the second, third unbranched
anal-fin ray longer and thicker than second and with two or
three* antrorse spines along anterior edge of distal segments,
Table 1. Morphometric data of the holotype (male) and paratypes of Tatia jaracatia, from the lower rio Iguaçu basin (n = 43,
including holotype). SD: standard deviation.
Characters
Standard length (mm)
Holotype
Range
65.7
27.4-72.2
Percents of standard length
Head length
23.9
21.2-26.3
Body depth
22.7
20.1-27.1
Humeral-spine length
21.2
18.2-24.7
Predorsal length
30.1
28.8-33.7
Dorsal-fin base length
9.4
8.3-11.2
Anal-fin base length (males)
4.0
3.9-5.4
Anal-fin base length (females)
–
8.1-10.9
Preanal distance (males)
77.5
73.8-84.5
Preanal distance (females)
–
69.6-74.1
Caudal-peduncle depth
16.0
13.2-16.8
Dorsal-fin origin to pectoral-fin origin
23.1
20.8-26.9
Dorsal-fin origin to pelvic-fin origin
33.0
30.3-40.6
Pectoral-fin origin to pelvic-fin origin
37.9
33.1-41.7
Prepectoral distance
21.9
18.8-24.5
Prepelvic distance
54.8
49.5-60.3
Dorsal-fin spine length
14.0
12.0-18.6
Pectoral-fin spine length
21.0
15.6-25.0
Longest pelvic-fin ray length
15.2
11.9-16.2
Longest anal-fin ray length (males)
7.5
6.9-9.3
Longest anal-fin ray length (females)
–
8.3-11.4
Body width
20.9
18.6-24.3
Maxillary-barbel length
29.7
26.3-39.8
Outer mental-barbel length
5.6
3.8-7.2
Inner mental-barbel length
8.2
6.3-10.9
Percents of head length
Gape width
33.1
25.0-35.5
Orbital diameter
19.1
18.9-25.8
Snout length
35.0
30.2-36.6
Interorbital width
58.0
54.0-62.0
Distance between anterior nares
33.8
28.9-34.2
Average
53.4
SD
–
24.2
24.1
21.3
31.7
9.7
4.4
9.9
78.8
71.9
15.0
24.0
35.1
37.7
21.5
56.1
15.9
21.8
13.6
8.1
9.9
21.2
32.6
6.0
8.9
1.13
1.94
1.12
1.22
0.72
0.40
0.67
3.02
1.31
0.87
1.24
2.35
2.26
1.16
2.16
1.55
1.75
1.28
0.7o
1.00
1.25
3.16
0.81
0.99
31.5
21.5
33.3
58.6
31.8
1.86
1.38
1.46
1.91
1.42
C. S. Pavanelli & A. G. Bifi
and first branched anal-fin ray with two retrorse spines along
anterior portion of median segments (Fig. 2). Proportions
between branched and unbranched fin rays differ among sexes
as well, as mentioned above.
Distribution. The new species is known from the lower rio
Iguaçu basin, upstream from the Iguaçu falls, Southern Brazil
(Fig. 3).
Etymology. The species name, jaracatia, refers to the typelocality, rio Jaracatiá, lower rio Iguaçu basin. Jaracatiá is an
indigenous name given to a fructiferous tree common in the
region. A noun in apposition.
Fig. 2. Tatia jaracatia, paratype, MZUSP 98251, adult male,
anal fin in left lateral view. Abbreviatons: as, antrorse spines;
b1, branched first ray; b7, branched seventh ray; hs17, hemal
spine 17; hs28, hemal spine 28; prf, proximal radials fused; rs,
retrorse spines; ui - uiii, unbranched first to third ray. Scale
bar = 1 mm.
Fig. 3. Map of southeastern Brazil and adjoining regions,
showing the type-locality of Tatia jaracatia (circle), rio
Jaracatiá, and the geographical distribution of the species
(dots), lower rio Iguaçu basin. Both symbols represent more
than one lot and/or locality.
203
Discussion
Tatia jaracatia fits all given characters for the genus
stated by Sarmento-Soares & Martins-Pinheiro (2008), but
exhibits a peculiar trunk color pattern composed of
conspicuous, irregular, pale blotches over a dark background.
Most species of Tatia (sensu Sarmento-Soares & MartinsPinheiro, 2008) are distributed across the Amazon, Tocantins,
and Orinoco rivers, and coastal drainages of the Guiana Shield.
The only two more southerly distributed species are T. boemia
and T. neivai from the Uruguay and Paraná rivers, respectively.
These last two species share with T. jaracatia the absence of
ribs on vertebra preceding the last rib-bearing vertebrae
(Soares-Porto, 1998). This putative osteological
synapomorphy suggests that all three Tatia species in the La
Plata basin are monophyletic.
Given its apparent absence from the entire rio Paraná basin
below Iguaçu Falls, T. jaracatia appears to be endemic to the
rio Iguaçu above the falls. The rio Iguaçu above Iguaçu Falls
has been described by several authors as relatively
depauperate in overall fish diversity, but high in fish endemism,
presumably due to isolating effects of the falls (Garavello et
al., 1997; Júlio Jr. et al., 1997; Baumgartner et al., 2006). Several
other new species putatively endemic to the region above
the falls are currently in press or in preparation by us and
other researchers, and we predict that further collecting effort
in the headwaters of rio Iguaçu will likely yield additional
new, endemic taxa.
Material examined (range of SL is given in millimeters). Brazil.
Centromochlus altae. MZUEL 1749, 6, 28.7-35.2, córrego Salobro,
Serra das Araras, Mato Grosso State; NUP 3113, 3, 21.9-30.0,
Manso Reservoir, rio Cuiabá, rio Paraguai basin, Mato Grosso State.
C. perugiae. MZUSP 31880, 1, 28.1, rio Tarauacá, affluent of rio
Juruá, rio Solimões basin, Acre State. C. schultzi. MZUSP 49189,
1, 46.6, rio Fontoura, rio Xingu basin, Pará State; MZUSP 86997,
1, 52.3, rio Culuene, affluent of rio Xingu, Mato Grosso State.
Glanidium cesarpintoi. DZSJRP 4570,1, 90.6, Salto Grande
Reservoir, upper rio Paraná basin, São Paulo State. G. melanopterum.
MZUSP 51275, 10 of 24, 82.0-100.8, rio Ribeira de Iguape, São
Paulo State. G. ribeiroi. NUP 5467, 127, 49.6-77.8, Salto Caxias
Reservoir, lower rio Iguaçu basin, Paraná State. Tatia aulopygia.
MZUSP 37764, 1, 61.3, igarapé affluent of rio Aripuanã, Aripuanã,
Mato Grosso State. T. cf. brunnea. MZUSP 84977, 5 of 35, 52.560.0, rio Tiquié, Amazonas State. T. caxiuanensis. MZUSP 47503,
1 c&s, 28.6, igarapé affuent of rio Capim, Pará State. T. cf. dunni.
MZUSP 6643, 1, 65.6, igarapé of lago Manacapuru, Manacapuru,
Amazonas State. T. galaxias. MZUSP 57269, 1, 45.4, rio Jutuaí,
Amazonas State. T. gyrina. MZUSP 84979, 1, 30.5, rio Tiquié,
Amazonas State. T. intermedia. MZUSP 30584, 3 of 5, 69.1-76.1,
rio Uraricuera, Roraima State; MZUSP 31881, 2, 35.7-37.7, igarapé
do Cujobim, Rio Branco, Roraima State. MZUSP 44127, 1, 86.8,
rio Pauini, Amazonas State. T. neivai. NUP 363, 2, 40.0, ribeirão
São Pedro, upper rio Paraná basin, Paraná State; NUP 971, 17,
19.7-51.9, rio Palmeiras, rio Paraguai basin, Mato Grosso State;
NUP 1106, 48, 28.6-72.2, rio do Peixe, affluent of rio Corumbá,
upper rio Paraná basin, Goiás State; NUP 2077, 2, 55.0-52.0, rio
Piquiri, upper rio Paraná basin, Paraná State; NUP 2080, 2, 45.463.5, Itaipu Reservoir, upper rio Paraná basin, Paraná State; NUP
A new Tatia from the rio Iguaçu basin
204
2687, 4, 60.0-61.8, Chavantes Reservoir (rio Paranapanema), upper
rio Paraná basin, Paraná State; NUP 2696, 4, 50.8-58.6, Canoas II
Reservoir (rio Paranapanema), upper rio Paraná basin, Paraná State;
NUP 2706, 1, 67.5, Salto Grande Reservoir (rio Paranapanema),
upper rio Paraná basin, Paraná State; NUP 3799, 2, 47.5-63.3, rio
Pirapó, upper rio Paraná basin, Paraná State; NUP 4225, 3, 59.868.4, rio Goioerê, upper rio Paraná basin, Paraná State; NUP 4260,
1, 42.0, rio Cuiabá, rio Paraguai basin, Mato Grosso State; NUP
4422, 4, 41.3-49.6, Rosana Reservoir (rio Paranapanema), upper
rio Paraná basin, São Paulo State; NUP 5331, 1 c&s, 60.0, rio do
Peixe, affluent of rio Corumbá, upper rio Paraná basin, Goiás State;
NUP 5332, 1 c&s, 43.1, rio Palmeiras, rio Paraguai basin, Mato
Grosso State; NUP 5949, 2, 57.6-63.0, rio Laranjinha, affluent of
rio Tibaji, upper rio Paraná basin, Paraná State. Paraguay. T. neivai.
CZCEN 314, 6, 59.6-65.2, arroyo Ytú, affluent of río Piribebuy, río
Paraguay basin, Cordillera. Venezuela. T. aulopygia. MZUSP 44072,
2, 68.1-70.3, Caño Cocuiza, affluent of río Orinoco, Bolívar.
Acknowledgements
We thank Weferson J. da Graça (UEM) for clearing and
staining specimens besides valuable discussions, Mário de
Pinna and Osvaldo Oyakawa (MZUSP) for loaning
comparative material and offering radiographic facilities, José
L. Birindelli (MZUSP) for providing some important
bibliographic references, and Francisco Langeani (DZSJRP)
and Oscar Shibatta (MZUEL) for loaning specimens.
Collections were made by the Gerpel (Grupo de Pesquisas em
Recursos Pesqueiros e Limnologia), and the Nupélia (Núcleo
de Pesquisas em Limnologia, Ictiologia e Aqüicultura), which
also provided logistical support. Research associated with
this study was supported by the Copel (Companhia Paranense
de Energia) and UEM (Universidade Estadual de Maringá)/
Nupélia. Both authors have been supported by grants from
CNPq (Conselho Nacional de Desenvolvimento Científico e
Tecnológico), and are participants of the ACSI (All Catfish
Species Inventory) Project, financed by the National Science
Foundation-USA.
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Accepted March 2009
Published June 17, 2009