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.

Two new species of the genus Aphis (Hemiptera, Aphididae) from Chile on host species of Alstroemeriaceae and Ericaceae

“…Abdominal segments 1–4 with more or less abundant polygonal spinal sclerites that can be coalescent, and usually without marginal sclerites (polygonal cells are present in one specimen); abdominal segments 5 and 6 each with wide transverse spinopleural band, and abdominal segments 7 and 8 with individual narrow transverse stripes; this variability is similar to that presented by A. tehuelchis Nieto Nafria & Lopez Ciruelos, 2016 ( Lopez Ciruelos et al 2016 ). Dorsal setae on thorax and abdomen also thick and pointed; marginal setae on intermediate abdominal segments 17–25 µm and 0.9–1.3 times D. Abdominal segment 8 with 2 setae, 20–22 µm and 0.9–1.1 times D. Siphunculi tapering on proximal 1/2–2/3 and distally cylindrical, with small flange and ornamentation of spinuled scales, 0.30–0.36 mm, 1.11–1.38 times cauda, and 6.00–6.56 times its diameter at mid length.…”

Una nueva especie de <em>Aphis</em> Linnaeus, 1758 (Hemiptera, Aphididae) recogida sobre <em>Gymnophyton</em> Clos (Apiaceae) en Argentina

“…n. is the 56th species of Aphis, in current sense of genus, recorded from South America, twenty-two are introduced and 34 are native (Ortego et al, 2013;López Ciruelos et al, 2016;Nieto Nafría et al, 2016a, 2016bGonzález Rodríguez et al, 2017). To establish the taxonomic identity of the new species, several characteristic of its apterous viviparous "big" and "small" females are confronted with selected more evident characteristics of other 55 species of Aphis and three close relatives belonging to genera Andinaphis and Protaphis (Table 2); firstly (1) presence (in A. cuyana) or lack of marginal tubercles on abdominal segment 7 and presence (in A. cuyana) or absence of posterior setae on genital plate, or (2) lack (in A. cuyana) or presence of marginal tubercles on abdominal segments 2-4, or (3) lack (in A. cuyana) or presence of marginal sclerotization on abdominal segments 2-4, and subsequently other qualitative or quantitative features if it were necessary.…”