Psyche: A Journal of Entomology / 2019 / Article / Tab 4

Research Article

Dimorphic Sessile Apterae of the Aphid Neothoracaphis glaucae (Hemiptera) on the Evergreen Oak Quercus glauca

Table 4

Main morphological differences between sexes in the first instar of Neothoracaphis yanonis.

FemaleMale

Body: smaller than male, 0.42–0.49 (mean 0.46) mm in length (n = 10); hind femorotrochanter: 89–105 (99) μm long (n = 10)Body: 0.56–0.60 (0.58) mm in length (n = 9); hind femorotrochanter: 104–113 (109) μm long (n = 9)
Antenna: 3-segmented; apical segment: 98–123 (114) μm long (n = 10) and 17–21 (18) μm wide (n = 10)Antenna: 4-segmented; apical two segments combined: 130–145 (137) μm long (n = 9) and 20–33 (26) μm wide (n = 9)
Stylets: far longer than rostrum, approximately 0.21–0.23 (0.22) mm long (n = 10)Stylets: short, approximately 0.06–0.10 (0.08) mm long (n = 9)
Spinal rows of wax plates: well developed, with 3–8 (5.4) cells on abdominal tergite VI (n = 10)Spinal rows of wax plates: often reduced, with 0–5 (1.7) cells on abdominal tergite VI (n = 9)