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FIGURE 1
Examples of vertebrate ichnotaxa with biostratigraphic significance. (A)
Dimetropus
leisnerianus
. Lower Permian, Hueco Formation, Robledo Mountains, New Mexico, USA. Scale
bar
5 cm. (B)
Grallator sulcatus
. Upper Triassic, Brunswick Formation, Clark Quarry, near Mil-
ford, New Jersey, USA. Scale bar
¼
5 cm. Photograph courtesy of Ver´nica Krapovickas. (C)
Iso-
chirotherium
isp. Lower Triassic, Wi´ry Formation, Wi´ry site, Holy Cross Mountains, Poland.
Scale bar
¼
5 cm. (D)
Caririchnium leonardii
. Lower Cretaceous, Dakota Group, Dinosaur Ridge,
Colorado, USA. Scale bar
¼
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