Allodaposuchus

Several skull and mandibular elements from Iharkút are assigned to a midsized crocodilian that is relatively widely considered to be closely related to the common ancestor of modern-day alligators, crocodiles and gharials. Allodaposuchus was a generalized form and superficially resembled a modern alligator or caiman. This group of crocodilians is endemic to the Cretaceous of Europe and they also might be related to Iharkutosuchus even though they don’t seem to be specialized at all. The morphology of the skull suggests that they most likely led a semiaquatic, omnivorous lifestyle, again similarly to alligators. Allodaposuchus has a key role in our understanding of the origin of the major modern-day crocodilian lineages and therefore the material from Iharkút is of great importance.

Unfortunately, the Iharkút form is too fragmentarily known at the moment and it remains unclear how it is related to similar species in Romania, France and Spain. The description of the material from Iharkút is in progress and preliminary research suggests that it is a new species (i.e. previously unknown for science) that was endemic to Iharkút. Interestingly, this species was considerably smaller compared to other species of Allodaposuchus which was either a result of dwarfism or alternatively the Iharkút Allodaposucuhus represents the ancestral, small body size of subsequent larger related forms.

Figure 1. Two lower jaw fragments of the Allodaposcuhus from Iharkút
Figure 1. Two lower jaw fragments of the Allodaposcuhus from Iharkút
Figure 2. Life reconstruction of Allodaposuchus and its environment
Figure 2. Life reconstruction of Allodaposuchus and its environment
Figure 3. Known distribution of Allodaposuchus and related crocodilians in the Late Createceous of Europe
Figure 3. Known distribution of Allodaposuchus and related crocodilians in the Late Createceous of Europe

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