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Table 2 Mean and standard deviation of the antennal and labium segments of three species of Rhodnius

From: Immature instars of three species of Rhodnius Stål, 1859 (Hemiptera, Reduviidae, Triatominae): morphology, morphometry, and taxonomic implications

Instars Species Characters  
   Antenna Labium
   1st seg 2nd seg 3rd seg 4th seg 1st seg 2nd seg 3rd seg
  R. marabaensis 0.14 ± 0.02A 0.36 ± 0.02A 0.69 ± 0.03A 0.64 ± 0.03A 0.17 ± 0.01A 0.52 ± 0.02A 0.29 ± 0.01A
First R. prolixus 0.13 ± 0.01A 0.43 ± 0.02B 0.73 ± 0.03B 0.62 ± 0.03A 0.17 ± 0.01AB 0.54 ± 0.02BC 0.28 ± 0.01AC
  R. robustus 0.13 ± 0.01A 0.37 ± 0.02A 0.68 ± 0.03A 0.63 ± 0.05A 0.16 ± 0.01AC 0.53 ± 0.03AC 0.27 ± 0.03BC
  R. marabaensis 0.17 ± 0.01A 0.60 ± 0.03A 0.94 ± 0.03A 0.83 ± 0.06A 0.24 ± 0.02A 0.86 ± 0.03A 0.34 ± 0.01A
Second R. prolixus 0.17 ± 0.01AB 0.68 ± 0.03B 0.95 ± 0.05A 0.78 ± 0.05A 0.26 ± 0.01B 0.86 ± 0.02A 0.37 ± 0.01B
  R. robustus 0.16 ± 0.01AC 0.59 ± 0.04A 0.93 ± 0.05A 0.79 ± 0.05A 0.24 ± 0.01A 0.81 ± 0.04B 0.35 ± 0.02A
  R. marabaensis 0.22 ± 0.01A 0.99 ± 0.05A 1.29 ± 0.05A 1.05 ± 0.08A 0.38 ± 0.03A 1.25 ± 0.08A 0.43 ± 0.02A
Third R. prolixus 0.22 ± 0.01A 0.94 ± 0.03B 1.16 ± 0.05B 0.88 ± 0.08B 0.35 ± 0.03B 1.21 ± 0.07AB 0.45 ± 0.02A
  R. robustus 0.22 ± 0.01A 0.99 ± 0.03A 1.24 ± 0.05C 0.95 ± 0.10B 0.39 ± 0.01A 1.29 ± 0.10AC 0.44 ± 0.03A
  R. marabaensis 0.30 ± 0.01A 1.64 ± 0.15A 1.73 ± 0.14A 1.38 ± 0.16A 0.55 ± 0.04A 2.17 ± 0.15A 0.63 ± 0.05A
Fourth R. prolixus 0.29 ± 0.02A 1.39 ± 0.09B 1.46 ± 0.13B 1.12 ± 0.08B 0.58 ± 0.07AB 1.95 ± 0.07B 0.64 ± 0.05A
  R. robustus 0.32 ± 0.01B 1.65 ± 0.10A 1.67 ± 0.10A 1.31 ± 0.09A 0.52 ± 0.06AC 1.87 ± 0.08B 0.54 ± 0.06B
  R. marabaensis 0.41 ± 0.02A 2.71 ± 0.13A 2.36 ± 0.09A 1.60 ± 0.23A 0.73 ± 0.05A 3.10 ± 0.15A 0.79 ± 0.04A
Fifth R. prolixus 0.40 ± 0.01A 2.17 ± 0.10B 1.90 ± 0.15B 1.37 ± 0.12BC 0.74 ± 0.05AC 2.66 ± 0.06B 0.75 ± 0.07AB
  R. robustus 0.40 ± 0.02A 2.48 ± 0.24C 2.19 ± 0.29A 1.47 ± 0.21AC 0.79 ± 0.05BC 3.15 ± 0.15A 0.83 ± 0.03AC
  1. Means with different superscripts at each site are significantly different from each other (one-way ANOVA followed by a Tukey test). In bold, we present statistically significant measurements for all three comparisons in Tukey’s pairwise test for differentiation of the species. Mean in millimeters
  2. Seg segment