Table 1 Morphometric differences between Rhodnius zeledoni, Rhodnius domesticus and Rhodnius paraensis. Scale in millimeters

Total length

13^a

13.31—18

10.5 – 12

Head longer than wide at eye level

1:0.36^a

1: 0.31- 0.5

1: 0.54 -0.55

Head longer than pronotum

1:0.69^a

1:0.63–1

1: 0.9–1

Anteocular region longer than postacular region

1:0.32^a

1: 0,3–0.4

1:0.63–0.64

Maximum width of the head between the eyes

1.11

1.13—1.28

0.87—0.91

Relationship between the width of an eye and the interocular region

1:1.27^a

1: 1.25–1.5

1: 1.55

Relationship between the visible segments of the labium

1:3.15:0.84^a

1: 2.8–3.16: 0.8–1

0.9–1:2.6–2.7:0.8–09

Scutellum length in dorsal view

0.67

0.66—0.69

0.7—0.72

Length of scutellar process in dorsal view

0.77

0.76—0.79

0.7—0.72