This slides are about the description of two new species of freshwater sardines Triportheus Cope, 1872 from the La Plata river basin, Brazil to be presented in the I Virtual Meeting of Systematics, Biogeography and Evolution.

1. New species of freshwater sardines
Triportheus Cope, 1872 (Actinopterygii,
Triportheidae) from the La Plata river
basin, Brazil
Douglas Alves Lopes¹,² & Fernando Rogério Carvalho²
¹Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia e Botânica, Instituto de
Biociências, Letras e Ciências Exatas, Universidade Estadual Paulista “Júlio de Mesquita Filho”, rua
Cristóvão Colombo, 2265, São José do Rio Preto, SP, 15054-000, Brazil.
²Laboratório de Ictiologia, Setor de Zoologia, Instituto de Biociências, Universidade Federal de Mato
Grosso do Sul, Av. Costa e Silva s/n°, Bairro Universitário, Campo Grande, MS, 79070-900, Brazil.
Image: IIAP
Image: Júan Calle

2. Introduction Material & Methods Results Discussion
Currently are valid 16 species, all of
Neotropical region;
In the Platin basin, are recorded two
valid species: Triportheus nematurus
(Kner, 1858) and Triportheus
pantanensis Malabarba, 2004;
In this work we presents two putative
new species of Triportheus from the La
Plata River basin.
Freshwater sardines Triportheus Cope,
1872 are fish with maximum standard
length 61,7mm to 245mm;
Triportheus pantanensis, holotype, MCP 35006, 97.1 mm;
Photo: B. B. Calegari (MCP).
Triportheus nematurus, ZUFMS 4857, 124.5mm. Photo:
F. Severo-Neto.

3. Introduction Material & Methods Results Discussion
We analyzed material from fish collections, in a taxonomic revision of the genus.
We perform measurements
and counts according Fink
& Weitzman (1974);
All the morphotypes of
Triportheus, collected in
the La Plata River basin
were analyzed;
The measurements are
expressed in percentage of
the standard length or
head length;
Species of other river
basins were included in
analysis, as comparative
material;

4. Introduction Material & Methods Results Discussion
Four species are recognized to La Plata river basin: Triportheus nematurus, T.
pantanensis and two putative new species:
Triportheus sp.n1: is recorded from the Pantanal wetland;
Differs of all congeners by the following combination of
characters:
1. 24-29 gill rakers in the first branchial arch;
2. 31-34 performed scales in the lateral line;
3. scales of predorsal line regularly disposed;
Triportheus sp.n2: is recorded from rio Grande, upper
Paraná River basin;
Differs of all congeners by the following combination of
characters:
1. 29-32 gill rakers in the first branchial arch;
2. 36-38 performed scales in the lateral line;
3. scales of predorsal line regularly disposed;
Triportheus sp.n1, not catalogued, 32.8 mm SL.
Triportheus sp.n2, DZSJRP 5366, 45.7mm SL.

5. Introduction Material & Methods Results Discussion
Triportheus sp.n1 was previously analysed by
Mariguela et al. (2016) in your molecular
study and pointed like a possible new species;
Triportheus sp.n2 was uncovered in fish
collection of two localities in the upper
Paraná River basin;
From the other species in the La Plata basin, Triportheus sp.n1 and Triportheus sp.n2 are easily
different in that they have small size and scales of the pre-dorsal line regularly arranged.
Triportheus represent a Neotropical taxon with poor taxonomic
definitions and diversity still little known.