title: A new species of Leposternon Wagler, 1824 (Squamata, Amphisbaenia) from northeastern Argentina.
abstract: A new species of Leposternon is described from the Humid Chaco biome in Argentina. The species is known only from its type locality, at El Bagual Ecological Reserve, a conservation unit located in the province of Formosa. The new species can be distinguished from all its congeners by the presence of rostral processes in the maxillae and nasals that contact each other on the facial portion of the skull. Additionally, we present a key for the species of Leposternon.
authors.affiliation: Laboratório de Ecologia e Comportamento Animal, Instituto de Ciências da Educação - ICED, Universidade Federal do Oeste do Pará, Rua Vera Paz, s/n, Salé, 68035-110, Santarém, Pará, Brazil. Centro de Formação Interdisciplinar - CFI, Universidade Federal do Oeste do Pará, Avenida Mendonça Furtado, 2946, Fátima, 68040-470, Santarém, Pará, Brazil; Email: siherp@hotmail.com.
authors.forename: Siria
authors.initials: S
authors.lastname: Ribeiro
authors.affiliation: Laboratório de Ecologia e Comportamento Animal, Instituto de Ciências da Educação - ICED, Universidade Federal do Oeste do Pará, Rua Vera Paz, s/n, Salé, 68035-110, Santarém, Pará, Brazil.; Email: alphredojr@hotmail.com.
authors.forename: Alfredo P
authors.initials: AP
authors.lastname: Santos
authors.affiliation: Museu de Zoologia da Universidade de São Paulo, Av. Nazaré 481, 04263-000, São Paulo, São Paulo, Brazil.; Email: hussam.zaher@gmail.com.
authors.forename: Hussam
authors.initials: H
authors.lastname: Zaher
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001118:Argentina; D049628:Body Size; D017753:Ecosystem; D005260:Female; D008116:Lizards / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D008297:Male; D009929:Organ Size