Corresponding author: Juan M. Nieto Nafría (
Academic editor: R. Blackman
The genus
Nieto Nafría JM, Mier Durante MP, López Ciruelos SI (2017)
Illustration by Essig (“E O E”), with its legend, of the description of
Comparing the descriptions of the two species, and Essig’s drawings of
The aim of this work is to contribute to knowledge of South American native aphid species by (1) increasing the known data of
Studied specimens of
Studied specimens of
Measurements were taken according to Nieto Nafría and Mier Durante (1998) with an ocular micrometer mounted on a light-field microscope. Microphotographs were taken with a Nikon set: SMZ1500 stereoscopic microscope with oblique coherent light, DXM1200F digital camera, and NIS-Elements F version 3.22 software (for Fig.
The qualitative features of the studied viviparous females of
Metric and meristic features of viviparous females of
Body [mm] | 2.800– |
2.600– |
2.200 | ||
Antenna [mm] | 3.875– |
3.600– |
3.513–3.675 | ||
Antenna / body [times] | 1.18– |
1.31–1.39 | 1.60–1.67 | ||
0.64– |
0.71– |
0.66–0.67 | |||
0.50– |
0.65– |
0.60–0.62 | |||
0.51– |
0.59– |
0.60–0.61 | |||
0.16– |
0.16–0.17 | ||||
1.03–1.24 | 1.18–1.32 | 1.13–1.25 | |||
1.5– |
1.7– |
1.7–1.9 | |||
5.5– |
6.6–7.1 | 6.6–7.8 | |||
Femur of hind legs [mm] | 0.97– |
1.05– |
0.37–0.38 | ||
Tibia of hind legs [mm] | 1.85– |
2.05– |
0.73–0.74 | ||
Ultimate rostral |
0.16– |
0.16– |
0.15 | ||
Ultimate rostral segment / its basal width [times] | 2.2 | 2.6–2.8 | |||
Ultimate rostral |
0.9– |
0.9– |
0.9 | ||
Ultimate rostral |
1.2– |
1.3– |
1.4 | ||
2nd |
0.12–0.14 | 0.12– |
0.11 | ||
Siphunculus [mm] | 0.48–0.61 | 0.44–0.53 | 0.39 | ||
0.05– |
0.04–0.5 | 0.04–0.05 | 0.04 | ||
0.07– |
0.06 | ||||
Siphunculus / body [mm] | 0.19– |
0.17– |
0.18 | ||
Siphunculus / |
0.6 | ||||
Siphunculus / |
8.5– |
9.2– |
11.3 | ||
Siphunculus / S |
5.6– |
6.0–6.6 | 6.6 | ||
1.3– |
1.7 | ||||
Cauda [mm] | 0.24–0.30 | 0.21– |
0.15 | ||
Cauda / siphunculus [times] | 0.5 | 0.5 | 0.4 | ||
Cauda / its basal width [times] | 1 | ||||
… |
0 | 0 [0] | 14– |
58–61 | |
… |
0 | 0 [0] | 0 [0] | 0 [0] | 15–33 |
… |
0 | 0 [0] | 0 [0] | 0 [0] | 7–12 |
… head, dorsal med. [μm] | 25– |
17– |
23 | ||
… head, dorsal med. / |
0.7 | 0.5– |
0.7 | ||
… |
15– |
15–18 | 18 | ||
… |
0.4–0.5 | 0.4–0.5 | 0.5 | ||
… penultimate rostral |
20– |
20– |
18 | ||
… ultimate rostral |
10–11 | 11 | |||
… ultimate rostral |
35– |
30– |
|||
… hind femur, dorsal [μm] | |||||
… hind femur, dorsal / |
0.6– |
||||
… hind tibia, dorsal medial [μm] | 22– |
20– |
|||
… hind tibia, dorsal medial / |
0.6– |
||||
… |
10–12 | 10–14 | |||
… |
10–14 |
|
13 | ||
… |
0.3–0.4 |
|
0.4 | ||
… |
25– |
25– |
20 | ||
… |
0.8– |
0.8– |
0.6 | ||
… |
5– |
6– |
4 | ||
… |
30–40 | 30– |
48 | ||
… |
0.9– |
1.5 | |||
… genital plate, discal [quantity] |
|
|
/// | ||
… genital plate, posterior [quantity] | 16– |
17– |
/// | ||
… cauda [quantity] |
|
4–7 [5] | 5 |
Additionally several qualitative features, particularly the absence of cilia in the relatively thick edge of the primary sensoria, allow us to separate this species from species in other genera of
Aphid genus belongig to tribe
Macrosiphine aphid with (1) primary sensoria with thick and non-ciliated edge (Fig.
Ten genera and one subgenus of
Feature 1 is the most distinctive character of the new genus, and is very exceptional in
The novelty of the genus could be assured with complete certainty by the analysis of some genetic marker, which cannot be carried out at present because all the known material of the species is mounted on microscopic slides.
The name
Colour unknown when alive, possibly green or light green, and perhaps, from Essig’s drawing, with two small dark spots on each side of several abdominal segments, brown cauda and dark brown or blackish brown siphunculi. When mounted variably light yellow, with head, including antennae and rostrum, legs, siphunculi, anal plate and cauda more or less pigmented (see below). Quantitative characters are in Table
Colour unknown when alive, possibly with dark brown or black head and thorax, including antennae and legs, and green abdomen with dark brown lateral spots, cauda and siphunculi. Quantitative characters are in Table
It is certain that
The species is currently known in two localities (one in Peru and the other in Argentina) that are 2,200 kilometers distant from each other. Possibly the species can be found in much of northern Argentina, southern Peru and also in eastern Bolivia and southwestern Brazil.
The authors wish to thank the persons in charge of the aphid collections of (1) the Muséum national d’Histoire naturelle of Paris (Adeline Soulier-Perkins), (2) the Department of Entomology of the California Academy of Sciences (Robert Zuparko and Brian L. Fisher), and (3) the Essig Museum of Entomology, University of California, Berkeley (Roberta L. Brett), for the facilities given for the study of the slides of both nominal species (