Skip to main content

Table 3 Estimates of mean divergence times, and respective 95% CL intervals given by non-Bayesian analyses of cytochrome b nucleotide sequences.

From: The taxonomic status of the endangered thin-spined porcupine, Chaetomys subspinosus(Olfers, 1818), based on molecular and karyologic data

Nodes NPRS-LOG GRMD Geological epoch
  Mean 95% CL Mean 95% CL  
Hystricomorpha 58.6 53.7–76.1 52.2 49.1–63.1 Late Pal.-Early Eoc.
Ctenodactylidae 26.3 22.7–33.4 17.68 14.8–20.5 Late Oli.-Early Mio.
Hystricognathi 46.4 42.4–54.0 44.1 41.5–49.6 Middle Eocene
Bathyergidae 23.5 17.8–26.9 20.9 16.6–24.2 Early Miocene
Caviomorpha 34.0 - 34.0 - Late Eocene
Erethizontidae 23.9 22.3–26.4 22.2 18.9–25.9 Late Oli.-Early Mio.
Erethizontinae 9.5 7.2–14.8 7.7 3.4–9.5 Late Miocene
Coendou + Sphiggurus 5.1 2.7–10.7 4.5 2.6–5.5 Late Mio.-Early Pli.
Coendou 0.1 0.1–0.7 0.1 0.02–0.2 Pleistocene
Sphiggurus 0.2 0.1–0.8 0.2 0.1–0.5 Pleistocene
Octodontoidea 27.0 - 27.0 - Late Oligocene
Echimyidae 20.0 - 20.0 - Early Miocene
Ctenomyidae 5.9 3.9–8.7 5.4 3.7–6.5 Late Miocene
Octodontidae 15.2 10.2–17.9 13.1 10.2–15.1 Middle Miocene
OGL+SCY 12.1 7.0–15.4 10.6 7.4–12.2 Middle-Late Miocene
Cavioidea 25.9 16.7–28.1 23.7 16.1–26.1 Late Oli.-Early Mio.
Caviidae 22.0 16.0–25.7 19.7 15.5–23.3 Early Miocene
  1. Estimates of divergence times expressed in million years. NPRS-LOG: nonparametric rate smoothing with log-scale rates. GRMD: global rate minimum deformation method. CL: confidence limits. The geological epochs corresponding to divergence times followed the 1999 Geologic Time Scale of the Geological Society of America. Pal.: Paleocene; Eoc.: Eocene; Oli.: Oligocene; Mio.: Miocene; Pli.: Pliocene.