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Table 1 Measurements of depth and width of the area internarica in mm. Ontogenetic stages increase from left to right: Monodelphis domestica (ESUT-Mo), Caluromys philander (ESUT-C), Sminthopsis virginiae (AMNH SR), Macropus eugenii (ESUT-M), Petaurus breviceps (LANE-P)

From: Ontogeny and phylogeny of the mammalian chondrocranium: the cupula nasi anterior and associated structures of the anterior head region

  ESUT--Mo10.5 ESUT--Mo11.5 ESUT--Mo8.5 ESUT--Mo63 ESUT--C6 ESUT--C15 ESUT--C13 ESUT--C25 ESUT--C26 AMNH SR 1A AMNH SR 2A AMNH SR 3A AMNH SR 4A ESUT--M11 ESUT--M16 ESUT--M28 ESUT--M53 LANE--P82A LANE--P48
Depth 0.22 0.18 0.28 0.32 0.38 0.30 0.54 0.68 0.80 0.12 0.14 0.14 0.12 0.42 0.50 0.93 1.95 0.39 0.40
Width 0.30 0.42 0.68 1.10 0.39 0.32 0.66 1.36 2.19 0.14 0.14 0.21 0.21 0.48 0.97 1.09 1.92 0.59 0.65
Ratio W:D 1.37 2.33 2.43 3.44 1.03 1.07 1.22 2.00 2.74 1.17 1.00 1.50 1.75 1.15 1.94 1.17 0.99 1.51 1.63