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Table 4 Morphometric variables (range and mean values in millimeters) of Ornithodoros rietcorreai larvae from Paraíba (♂PB × ♀PB homologous cross; n = 10); Piauí (♂PI × ♀PI homologous cross; n = 10); Paraíba × Piauí (♂PB × ♀PI heterologous cross; n = 10); and Piauí × Paraíba (♂PI × ♀PB heterologous cross; n = 7) utilized in the principal components analysis (PCA)

From: A new argasid tick species (Acari: Argasidae) associated with the rock cavy, Kerodon rupestris Wied-Neuwied (Rodentia: Caviidae), in a semiarid region of Brazil

  O. rietcorreai
Paraíba
O. rietcorreai
Piauí
O. rietcorreai
Paraíba × Piauí
O. rietcorreai
Piauí × Paraíba
Body lengtha 0.723–0.784 (0.758) 0.742–0.841 (0.797) 0.732–0.762 (0.748) 0.723–0.782 (0.754)
Body lengthb 0.396–0.465 (0.439) 0.435–0.475 (0.457) 0.416–0.445 (0.435) 0.435–0.475 (0.456)
Body width 0.372–0.411 (0.393) 0.386–0.465 (0.414) 0.346–0.416 (0.381) 0.366–0.416 (0.393)
Dorsal plate: length 0.256–0.293 (0.269) 0.268–0.305 (0.281) 0.254–0.273 (0.263) 0.256–0.278 (0.264)
Dorsal plate: width 0.151–0.188 (0.167) 0.185–0.219 (0.197) 0.163–0.195 (0.179) 0.166–0.195 (0.172)
Dorsal setae pairs: total 14 14 14 14
Dorsal setae pairs: dorsolateral 11 11 11 11
Dorsal setae pairs: central 3 3 3 3
Central setae 1: length 0.063–0.085 (0.076) 0.073–0.090 (0.081) 0.073–0.085 (0.079) 0.078–0.085 (0.082)
Central setae 2: length 0.068–0.075 (0.072) 0.068–0.075 (0.071) 0.068–0.075 (0.071) 0.071–0.085 (0.079)
Central setae 3: length 0.075–0.088 (0.081) 0.063–0.083 (0.078) 0.078–0.093 (0.085) 0.075–0.090 (0.084)
Sternal setae 1: length 0.051–0.063 (0.057) 0.063–0.073 (0.069) 0.056–0.068 (0.061) 0.061–0.068 (0.063)
Sternal setae 2: length 0.051–0.061 (0.057) 0.061–0.068 (0.064) 0.056–0.063 (0.058) 0.054–0.066 (0.061)
Sternal setae 3: length 0.056–0.066 (0.060) 0.066–0.075 (0.070) 0.053–0.066 (0.060) 0.058–0.073 (0.064)
Circumanal setae 1: length 0.053–0.061 (0.056) 0.056–0.071 (0.061) 0.051–0.061 (0.057) 0.051–0.063 (0.056)
Circumanal setae 2: length 0.058–0.073 (0.063) 0.065–0.075 (0.071) 0.058–0.073 (0.065) 0.066–0.073 (0.069)
Circumanal setae 3: length 0.073–0.085 (0.076) 0.078–0.085 (0.082) 0.078–0.083 (0.079) 0.075–0.087 (0.081)
Posteromedian setae: length 0.041–0.049 (0.044) 0.044–0.051 (0.045) 0.036–0.056 (0.042) 0.041–0.048 (0.044)
Postcoxal setae: length 0.053–0.073 (0.063) 0.058–0.071 (0.063) 0.053–0.061 (0.059) 0.053–0.073 (0.063)
Length of basis capitulic 0.129–0.134 (0.133) 0.136–0.149 (0.144) 0.112–0.134 (0.126) 0.124–0.142 (0.134)
Length of basis capitulid 0.154–0.171 (0.158) 0.158–0.173 (0.169) 0.134–0.158 (0.146) 0.149–0.158 (0.153)
Length of capitulume 0.362–0.396 (0.380) 0.376–0.406 (0.390) 0.362–0.382 (0.376) 0.366–0.386 (0.374)
Width of basis capituli 0.185–0.195 (0.191) 0.197–0.210 (0.204) 0.171–0.190 (0.182) 0.183–0.219 (0.200)
Palpal length 0.264–0.294 (0.278) 0.268–0.288 (0.277) 0.256–0.274 (0.262) 0.267–0.287 (0.276)
Length article I 0.049.0.061 (0.054) 0.058–0.061 (0.059) 0.049–0.061 (0.053) 0.049–0.061 (0.056)
Length article II 0.083–0.100 (0.092) 0.083–0.085 (0.084) 0.085–0.100 (0.094) 0.083–0.097 (0.089)
Length article III 0.088–0.107 (0.100) 0.097–0.100 (0.098) 0.097–0.110 (0.104) 0.098–0.107 (0.100)
Length article IV 0.036–0.044 (0.039) 0.039–0.044 (0.041) 0.039–0.046 (0.041) 0.034–0.044 (0.039)
Width article I 0.027–0.039 (0.030) 0.027–0.029 (0.028) 0.027–0.029 (0.028) 0.027–0.032 (0.028)
Width article II 0.034–0.044 (0.038) 0.034–0.036 (0.035) 0.036–0.039 (0.037) 0.034–0.036 (0.035)
Width article III 0.024–0.032 (0.028) 0.029–0.034 (0.031) 0.027–0.032 (0.029) 0.031–0.034 (0.032)
Width article IV 0.019–0.024 (0.022) 0.019–0.022 (0.020) 0.019–0.022 (0.021) 0.019–0.022 (0.020)
Hypostome: lengthf 0.232–0.254 (0.247) 0.237–0.256 (0.249) 0.236–0.246 (0.240) 0.227–0.241 (0.236)
Hypostome: lengthg 0.190–0.210 (0.202) 0.202–0.212 (0.206) 0.207–0.224 (0.213) 0.188–0.202 (0.196)
Hypostome: width at midlength 0.039–0.046 (0.043) 0.041–0.051 (0.046) 0.043–0.049 (0.044) 0.041–0.046 (0.043)
Hypostome: width at the base 0.044–0.053 (0.049) 0.044–0.056 (0.050) 0.046–0.058 (0.051) 0.040–0.056 (0.050)
Apical dental formula 3 3 3 3
Median dental formula 3 3 3 3
Basal dental formula 2 2 2 2
Denticles in hypostomal row 1 20 to 21 18 to 20 20 to 22 20 to 22
Denticles in hypostomal row 2 20 to 21 18 to 19 19 to 21 20 to 22
Denticles in hypostomal row 3 12 to 15 13 to 14 13 to 16 13 to 15
Tarsus I: length 0.158–0.190 (0.167) 0.190–0.202 (0.195) 0.146–0.158 (0.155) 0.166–0.171 (0.168)
Tarsus I: width 0.049–0.061 (0.056) 0.061–0.068 (0.063) 0.049–0.061 (0.056) 0.058–0.063 (0.061)
  1. aIncluding capitulum
  2. bNot including capitulum
  3. cLength of basis capituli: measured from the posterior margin of basis capituli to posthypostomal setae 1 (Ph1)
  4. dLength of basis capituli: measured from the posterior margin of basis capituli to insertion of hypostome
  5. eLength of capitulum: measured from the posterior margin of basis capituli to the anterior end of hypostome
  6. fMeasured to Ph1
  7. gMeasured to the posterior end of the toothed portion