Table 1 Main morphological characteristics of the external genitalia of Triatoma jatai, Triatoma costalimai and Triatoma williami

T. jatai

W-shaped, with a 1 + 1 lateral depression rising in the median region (Fig. 1a)

Rectilinear, decaying laterally, ending at half of the suture of the rounded apex connective (Fig. 1a)

Trapezoidal, with bulging lateral walls covered by thick, short, sparse setae that end near the anal tube (Fig. 1a)

Prominent in the median region (Fig. 1d)

Long and wide (Fig. 1d)

Short spines on the apex and at the base with single, bifurcated, and trifurcated points (Fig. 1g)

T. costalimai

Non-rectilinear posterior edge, ending near the suture of the connective (Fig. 1b)

Convex and ends at half of the suture of the connective with poingted apex (Fig. 1b)

Trapezoidal, with straight lateral walls, 1 + 1 apical recesses near the anal tube, covered with thick, long setae (Fig. 1b)

Convex (Fig. 1e)

Long and narrow (Fig. 1e)

Short spines on the apex with single, bifurcated, and trifurcated points (Fig. 1h)

T. williami

Rectilinear at the median region rising at the lateral margins towards the connexival suture (Fig. 1c)

Rectilinear ending at the median line of the connexival suture (Fig. 1c)

Trapezoidal, with bulging lateral walls, presenting a 1 + 1 sharp depressions close to the anal tube, covered by short, thick setae (Fig. 1c)

Not prominent (Fig. 1f)

Triangular and close to the median line of urosternite VII (Fig. 1f)

Short single-pointed apex spines (Fig. 1i)