G. E. Terán et al.: First Record of Loricariichthys edentatus in the Paraná River
58
First Record of Loricariichthys edentatus
(Siluriformes: Loricariidae) in the Paraná River
Guillermo E. Terán
1*
, Gastón Aguilera
1
, Wilson S. Serra
2
, Federico J. Ruiz Díaz
3
,
J. Marcos Mirande
1
1
Fundación Miguel Lillo UEL CONICET. Miguel Lillo 251, (4000) S. M. de Tucumán, Argentina.
2
Seccn Ictiología, Dpto. de Zooloa, Museo Nacional de Historia Natural, Montevideo, Uru-
guay.
3
Instituto de Ictiología del Nordeste, Facultad de Ciencias Veterinarias, Universidad Nacional del
Noreste, UNNE. Sargento Cabral 2139, (3400) Corrientes, Argentina.
*
guilloteran@gmail.com
Primer registro de Loricariichthys edentatus (Siluriformes:
Loricariidae) en el o Paraná
ä Ref. bibliográfica: Terán, G. E.; Aguilera, G.; Serra, W. S.; Ruiz az, F. J.; Mirande, J. M. 2019. First Record
of Loricariichthys edentatus (Siluriformes: Loricariidae) in the Para River”. Acta zoogica lilloana 63 (1):
58–63. Fundación Miguel Lillo, Tucumán, Argentina. D.O.I.: https://doi.org/10.30550/j.azl/2019.63.1/4
ä Recibido: 22/04/19 Aceptado: 13/05/19
ä URL de la revista: http://actazoologica.lillo.org.ar
ä Algunos derechos reservados. Esta obra esbajo una Licencia Creative
Commons Atribución No Comercial Sin Obra Derivada 4.0 Interna-
cional.
NOTA
ABSTRACT
Recent expeditions to northeastern Argentina in the Para River revealed the
presence of the armored catfish Loricariichthys edentatus Reis & Pereira 2000, which
represents the first record of this species to that basin.
Keywords Corrientes province, distribution, endemism, range extension, La Plata River basin.
RESUMEN
Campas realizadas al noreste de Argentina en el río Para revelaron la pre-
sencia de la vieja del agua Loricariichthys edentatus Reis & Pereira 2000, que representa
el primer registro de esta especie para esa cuenca.
Palabras clave — Provincia de Corrientes, distribución, endemismo, extensión de rango, cuenca
del Río de la Plata.
Acta zoológica lilloana 63 (1): 58–63, 7 de junio de 2019
58
Acta zoológica lilloana 63 (1): 58–63, 7 de junio de 2019
59
INTRODUCTION
Loricariidae is one of the most diverse families within the order Siluriformes,
with 988 valid species in about 70 genera (Fricke, Eschmeyer, Fong, 2019). Among
members of this family, Loricariichthys Bleeker, 1862, is a diverse genus widespread
in South America, being distributed in most major cis-Andean freshwater drainages
up to the North of Buenos Aires (Reis & Pereira, 2000).
According to Rapp Py-Daniel (1997), the species of Loricariichthys share the fol-
lowing derived features: (1) third infrapharyngobranchial with a triangular lateral
flange; (2) ventral shelf of the antero- and posterohyal tall, deflected posteriorly so
that it nearly forms a 180º angle with the main bodies of the bones; (3) ventral pro-
cesses of the Weberian complex not ossified. Also, Reis & Pereira (2000) proposed
two additional characters: (1) upper lip completely fused to the premaxillary region
medially, never having a free margin with barbel-like fringes along the transverse,
medial portion; the fringes, when present, are restricted to the outer, more lateral
portion of the lip and (2) the lower lip of immature males and females with two
thick, cushion-like structures, which are covered with small papillae and have ir-
regular fringes along the posterior edge.
Currently, Loricariichthys is composed of 20 valid species (Fricke, Eschmeyer,
Van der Laan, 2019). Six species of the genus have been recorded from Argentina
(Mirande and Koerber 2015): Loricariichthys anus (Valenciennes 1836), L. edentatus
Reis & Pereira 2000, L. labialis (Boulenger 1895), L. melanocheilus Reis & Pereira
2000, L. platymetopon Isbrücker & Nijssen 1979, and L. rostratus Reis & Pereira 2000.
From these, Loricariichthys anus, L. labialis, L. patymetopon, and L. rostratus are known
to occur in the Paraná River.
Recent expeditions to the Paraná River in Corrientes, Argentina, revealed a dis-
tinct species in this basin. The aim of this contribution is to report the occurrence
of Loricariichthys edentatus in the Paraná River basin for the first time.
METHODS
Morphometric measurements were taken using calipers to nearest 0.1 mm fol-
lowing Reis & Pereira (2000) and are expressed as percent of standard length (SL)
and head length (HL). Comparative material is listed in Appendix I.
Institutional abbreviations: CI-FML: Colección Ictiológica Fundación Miguel
Lillo, San Miguel de Tucumán; ZVC-P: Fish Collection of Facultad de Ciencias,
Universidad de la Reblica, Montevideo, Uruguay.
G. E. Terán et al.: First Record of Loricariichthys edentatus in the Paraná River
60
RESULTS
Loricariichthys edentatus Reis & Pereira 2000
Fig. 1, Table 1
Material examined.— CI-FML 7593, 2, 167.3 and 178.6 mm SL. Argentina,
Corrientes, Ituzain, Paraná River at 27º34.822S; 541.081’ W. December 2018.
Coll.: Ten, Aguilera, Ruiz az & Bugeau.
Identification.— The analyzed specimens presents the following characters:
(1) absence of premaxillary teeth, (2) caudal peduncle very depressed but deepening
before the caudal fin, (3) a wide rostral border (11.0 and 11.8% HL) and (4) pointed
snout in dorsal view. These characters diagnose Loricariichthys edentatus from its
congeners (Reis & Pereira, 2000). Morphometric measurements of L. edentatus (Fig.
1) from Para River are presented in Table 1.
Figure 1. Loricariichthys edentatus from Paraná River. 178.6 mm Standard Length. Dorsal and ventral
view (mirrored).