Distiphallus (Figs 11, 12) is an intricate structure: it has a large ventral process, which bears a digitiform
ventral process; both apical process and ventral edge above the ventral process serrate.
24 [23-25]; Table 1), and by the presence of the unique digitiform
opercular processes (Parin, 1990; Okiyama, 2000).
26) with two narrow digitiform
apophyses and distal tooth (Fig.
4g); first antennal segment elongate, bottle-shaped (Figs 4g, 14); second antennal segment fusiform; labium short; hind tibiae arcuate, with elongate, pale bristlelike setae; genital opening of pygophore with digitiform
basal apophysis in the male palpal bulb: absent = 0; present = 1 (see fig.
Paramere of male genitalia with long digitiform
prominence apically, and with sparse and short setae apically and inner-laterally (Fig.
Legs: Femur of legs on segments 4-6 with digitiform
This species closely resembles Aphis craccivora Koch, but can be differentiated by: (1) when alive the specimens are covered with a whitish waxy powder, (2) the shape of the cauda, which is more triangular than digitiform
, (3) some small differences in measurements (see below), and 14) the males are apterous.
This species differs from all other species of the genus by the combination of the presence of six lateral organs and the characteristic chaetotaxy and genitalia: males with 4 + 4 thickened secretory setae (a) and only one seta (s) on sternites IV-VI; different ventral opisthosomal chaetotaxy in both sexes; the presence of strongly developed fusules on very long dilated digitiform
processes in male genitalia; and the shape of genitalia in females.
process of telocoxite apically broad and without prominent knobs (Fig.
Paramere much shorter than proctiger, subrectangular, with short digitiform
antero-apical strongly sclerotized process, and broad postero-apical strongly sclerotized tooth; covered in long setae in distal and posterior half on the outer face, and more or less evenly on the entire surface on the inner surface.
Palp with ventral, retrolateral and distal tibial apophyses; ventral apophysis digitiform
, retrolateral apophysis small, and distal apophysis spinous; bulb longer than wide, embolus long and filiform (Figs.