 |
| Farlowella azpelicuetae Terán, Ballen, Alonso, Aguilera & Mirande, 2019 |
ABSTRACT
A new species of Farlowella is described from the Bermejo River basin, in Salta and Jujuy provinces, northwestern Argentina. The new species belongs to the Farlowella nattereri species group. The new species is diagnosed by the following combination of characters: marbled rostrum, five rows of lateral plates series, relatively short snout (snout-mouth length less than 50.0% of head length), complete half-moon shaped spot on caudal fin, and short predorsal distance (37.8-41.8% of standard length).
Keywords: Armored catfish; Chaco Ecoregion; Endemic species; Loricariinae; Taxonomy
 |
| Farlowella azpelicuetae Argentina, Salta, Bermejo River, La Plata River basin. holotype, CI-FML 7277, 142.4 mm SL, a. lateral, b. dorsal, and c. ventral views. paratype, CI-FML 7265, 193.9 mm SL. a. detail of the coloration of the snout; b. coloration pattern of caudal fin; c. coloration of live specimen. |
Farlowella azpelicuetae, new species
Diagnosis. Farlowella azpelicuetae differs from most congeners, except F. altocorpus, F. gianetii, F. gracilis, F. hasemani, F. isbrueckeri, F. jauruensis, F. nattereri, and F. odontotumulus, by the presence of five rows on lateral plate series of body (vs. four). Farlowella azpelicuetae differs from F. gracilis, F. hasemani, F. isbrueckeri, F. nattereri, and F. odontotumulus by having proportionally-shorter snout-mouth length (less than 50% HL vs. more than 50% HL). The new species differs from F. jauruensis and F. gianetii by its marbled coloration pattern of snout (vs. snout completely dark and snout darkly pigmented only laterally, respectively). Farlowella azpelicuetae differs from F. altocorpus by having a continuous half-moon pigmentation pattern on the caudal fin (vs. discontinuous half-moon shaped pattern) and by the shorter predorsal length (37.8-41.8 % SL vs. 43.7-45.6% SL). The new species can be further distinguished by the presence of three rows of abdominal plates (vs. two in F. acus, F. amazonum, F. colombiensis, F. henriquei, F. martini, F. rugosa, F. venezuelensis, F. vittata, and F. yarigui and an incomplete median disjunct row of abdominal plates in F. mitoupibo). Additionally, F. azpelicuetae differs from F. hahni, F. knerii, F. oxyrryncha, F. reticulata, and F. schreitmuelleri by having irregular dark brown blotches on ...
Etymology. The species is named azpelicuetae after Dr. María de las Mercedes Azpelicueta, in recognition of her prominent contributions to ichthyology, especially to the systematics of Argentinian fishes. She described numerous species and was essential to the formation of subsequent generations of freshwater fish systematists in Argentina. A matronym in genitive case.
Guillermo E. Terán, Gustavo A. Ballen, Felipe Alonso, Gastón Aguilera and J. Marcos Mirande. 2019. A New Species of Farlowella (Siluriformes: Loricariidae) from the upper Bermejo River, La Plata River basin, northwestern Argentina. Neotropical Ichthyology. 17(2); e180114. DOI: doi.org/10.1590/1982-0224-20180114
RESUMEN: Se describe una nueva especie de Farlowella de la cuenca del Río Bermejo, en las provincias de Salta y Jujuy, en el noroeste de Argentina. La nueva especie pertenece al grupo de Farlowella nattereri. La nueva especie se diagnostica con la siguiente combinación de caracteres: rostro veteado, cinco hileras de placas laterales en el cuerpo, hocico relativamente corto (longitud hocico-boca menor a 50.0% longitud cabeza), mancha en forma de media luna completa en la aleta caudal, y distancia predorsal corta (37.8-41.8% longitud estándar).
Palabras clave: Ecoregion Chaco; Especie endémica; Loricariinae; Taxonomía; Viejita del agua
