Isopodichnus Bornemann, 1889, was created after the first ichnologists
have discussed a long time about interpretations and synonymies of Rusophycus (Pemberton and Frey, 1991).
A number of papers are based on ichnofabric analysis, an approach to documenting the relative chronology and intensity of infaunal tiering that is enjoying a vogue among ichnologists
, but papers that maintain the traditional ichnological emphasis on Seilaeherian ichnofacies are also represented.
In this latter case, ichnologists
have to accept that the fossil record may be inadequate for producing clear-cut classifications.
, who study footprints, are beginning to piece together a dinosaur "freeway" they believe might have run for hundreds of kilometers along the coast of the ancient sea that filled the interior of North America during the Cretaceous period.