A new species of Neoplecostomus Eigenmann & Eigenmann, 1888 (Siluriformes: Loricariidae: Neoplecostominae) from the upper rio Parana basin

Author(s)

Andrade, Breno Neves ^[1] ; Langeani, Francisco ^[1]

Affiliation

^[1] Univ Estadual Paulista, UNESP, Inst Biociencias Letras & Ciencias Exatas, Dept Zool & Bot, Lab Ictiol, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

• Document type: Journal article
• Source: Neotropical Ichthyology; v. 12, n. 4, p. 675-681, OCT-DEC 2014.
• Web of Science Citations: 6

Abstract

Neoplecostomus jaguari, a new neoplecostomine, is described based on material from the rio Jaguari, rio Tiete basin, southeastern Brazil. The new species differs from all congeners by having a conspicuous sexual dimorphism: females with 30-38 teeth in the dentary and 30-39 in the premaxilla, and males with 13-18 and 14-20 teeth, respectively (vs. number of teeth in the dentary and premaxilla approximately equivalent in all other species, except for N. langeanii in the premaxilla); females with larger mandibullary width, 18.5-21.6% HL, males 11.8-15.7% HL (vs. mandibullary width in males and females approximately equivalent); females with teeth longer and thin, males with teeth shorter and robust (vs. teeth similar in other species, except for N. langeanii in the premaxilla). Furthermore the new species is distinguished from all other species from the upper rio Parana basin by having a lateronasal plate either forming the border of the nostril or posteriorly displaced (vs. lateronasal plate absent). Finally, other useful character includes four to six plates between the frontal and prefrontal, herein called posteronasal plates (vs. one to three in all other species). An identification key to all Neoplecostomus species is provided. (AU)

• FAPESP's process: 12/23224-9 - Loricariidae from the Crystalline Brazilian Shield, with emphasis in the Hypoptopomatinae and Neoplecostominae subfamilies
• Grantee: Francisco Langeani Neto
• Support Opportunities: Regular Research Grants