In 2007, the dinosaur footprints research group of the Universities of Rabat and La Rioja began the
mapping of the Iouaridène ichnological sites. The initial problems were the footprints number - several
thousands for some scientits- the ichnotaxonomy, and their geographical and geological distribution.
Our first results (west Iouaridène area) were published in 2008. In addition to two ichnotaxons defined
here, we have studied: gigantic theropod and ornithopod footprints; semipantigrade theropod ichnites
and the largest world theropod trackway are new contributions to Iouaridène dinosaur footprints
knowledge. In this work, are demostrated the following questions: i) the maximun number of footprints
in the Iouaridène sincline is less than 2000; ii) in the east area there is minor density of sites and the
number of footprints that in the west part; iii) the greatest number of semiplantigrade theropod ichnites;
iv) the fosiliferous levels reduction from 20 to one. Probably, the four properties geographically related
- stratigraphic, number, density (sites and footprints) and the diversity of semiplantigrade ichnites - are
other singenetic relations
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