Fig. 2 Bivariate plots of skull measurements. Regression lines and 95% prediction intervals of the measurements and angles plotted by GLS and geometric mean in the Ornithorhynchus compared to Obdurodon. Scales are log-transformed for linear measurements. Mainland platypuses are shown as gray circles, whereas Tasmanian platypuses are shown as black open circles.
Fig. 3 CT slices along the anteroposterior axis of Obdurodon and Ornithorhynchus skulls at the tooth or horny pad position (see Fig. 1). (A and B) Ob. dicksoni (from Digimorph; Queensland Museum F20568). (C) Or. anatinus (YAMA M-1). (D) Or. anatinus (from Digimorph; American Museum of Natural History M200255).
- Table 1 Skull measurements of Obdurodon and Ornithorhynchus.
Data are means ± SD. n, number of specimens.
Measurements Obdurodon Ornithorhynchus n GLS 131.20 92.80 ± 8.31 32 Angle (a) 87.06 69.15 ± 3.43 25 Angle (b) 80.59 93.33 ± 3.55 25 Infraorbital foramen 3.47 3.13 ± 0.38 32 Braincase 35.86 32.18 ± 2.19 32 Zygomatic breadth 50.63 42.20 ± 3.98 32 Occipital breadth 27.45 23.76 ± 2.36 32 Orbit 11.85 9.17 ± 0.84 32 Geometric mean 25.41 21.02 ± 1.87 32
Supplementary Materials
Supplementary material for this article is available at http://advances.sciencemag.org/cgi/content/full/2/10/e1601329/DC1
fig. S1. Relationship between body mass and orbit size (anteroposterior diameter) for Ornithorhynchus and Obdurodon.
Reference (26)
Additional Files
Supplementary Materials
This PDF file includes:
- fig. S1. Relationship between body mass and orbit size (anteroposterior diameter) for Ornithorhynchus and Obdurodon.
- Reference (26)
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