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.
| Female | Male |
| 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) |
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