title: Three new South American species of genus Aphis (Hemiptera: Aphididae) <br />living on species of Euphorbia (Euphorbiaceae).
abstract: Three species of Aphis living on species of Euphorbia in Argentina and Chile are described: Aphis tehuelchis Nieto Nafría & López Ciruelos, sp. n., from viviparous females collected in the Argentinean provinces of Santa Cruz and Neuquén, Aphis maulensis Mier Durante & García-Tejero, sp. n., from viviparous females collected in the Chilean Region VII, and Aphis eucollinae López Ciruelos & Ortego, sp. n., from viviparous females, oviparous females and males collected in the Argentinean province of Mendoza. These new species may be distinguished from each other, besides other features, by the abdominal marginal tubercles: in A. tehuelchis these are present on segments 1 and 7 and on several of segments 2 to 6, in A. maulensis they are on segment 1 and on several segments 2 to 6, but lacking on segment 7, and in A. eucollinae they are only on segments 1 and 7. Differences between the new species and those currently known living on Euphorbia around the world are presented.
authors.affiliation: Departamento de Biodiversidad y Gestión Ambiental (área de Zoología), Universidad de León, 24071 León, Spain.; Email: slopec01@estudiantes.unileon.es.
authors.forename: Sara I López
authors.initials: SI
authors.lastname: Ciruelos
authors.affiliation: Departamento de Biodiversidad y Gestión Ambiental (área de Zoología), Universidad de León, 24071 León, Spain.; Email: mpmied@unileon.es.
authors.forename: M Pilar Mier
authors.initials: MP
authors.lastname: Durante
authors.affiliation: INTA EEA Mendoza, San Martín 3853. Luján de Cuyo, Mendoza, Argentina.; Email: jortego@mendoza.inta.gov.ar.
authors.forename: Jaime
authors.initials: J
authors.lastname: Ortego
authors.affiliation: Departamento de Biodiversidad y Gestión Ambiental (área de Zoología), Universidad de León, 24071 León, Spain.; Email: tejeretor@gmail.com.
authors.forename: Sergio
authors.initials: S
authors.lastname: García-Tejero
authors.affiliation: Departamento de Biodiversidad y Gestión Ambiental (área de Zoología), Universidad de León, 24071 León, Spain.; Email: jmnien@unileon.es.
authors.forename: Juan M Nieto
authors.initials: JM
authors.lastname: Nafría
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001042:Aphids / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D001118:Argentina; D049628:Body Size; D002677:Chile; D028481:Euphorbia / Q000469:parasitology*; D005260:Female; D008297:Male; D009929:Organ Size