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Table 7 Tentative evaluation of divergence times

From: Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae), the Cayenne tick: phylogeography and evidence for allopatric speciation

Clade

Calibration 1

Calibration 2

Ingroup

13.2 (8.0–18.5)

16.2 (9.8–23.5)

AR-PE

8.5 (5.5–11.9)

9.6 (6.0–13.4)

EA-NE-NW-CO

8 (4.9–11.5)

10.2 (4.9–16.5)

NW-NE-CO

5.8 (2.7–8.4)

7.7 (3.5–12.6)

NE-CO

3.3 (0.9–4.9)

4.3 (1.8–7.1)

PE

0.3 (1.1 -2 – 0.8)

0.4 (1.9 -2 – 1.2)

AR

0.6 (9.4 -2 – 1.5)

0.8 (0.1–2.4)

EA

1.7 (0.3–7.8)

1.8 (0.3–5.5)

NE

0.5 (0.1–1.0)

0.9 (0.2–2.5)

NW

0.5 (6.2 -2 – 1.1)

0.9 (0.1–3.8)

CO

8.1-2 (1.8 -3 – 0.2)

0.23 (2.1 -3 – 0.7)

  1. Comparison of divergence times found in this study with calibration 1 (outgroup-ingroup at 20 ± 5 Mya and PE-AR at 10 ± 2 Mya) and calibration 2 (PE-AR at 10 ± 2 Mya and NW-NE-CO at 6 ± 1 Mya). Times are in millions of years (Mya) and refer to mean estimated ages (and confidence intervals) of the specified clade. NW = Ecuador, Costa Rica, Mexico, Texas; CO = Colombia; NE = French Guiana + Venzuela + Brazil (Rondonia); EA = Brazil (Atlantic Coast, Mato Grosso) + Argentina (Yungas); AR = Agentina + Paraguay (Chaco); PE = Perú.