The fact that the two species of Eosuchus lived on either side of the Atlantic Ocean implies that these populations may have been separated geographically from one another while not necessarily having to be separated stratigraphically (that is, if the temporal ranges of the two species coincide with one another).
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minor, was named by Othniel Charles Marsh in 1870 on the basis of the holotype specimen YPM 282, consisting of cranial fragments and isolated vertebrae found from the Manasquan Formation in Monmouth County, New Jersey.
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The strata from which both species of Eosuchus have been found were though to have formed in a marginal marine depositional environment, and thus probably reflect the actual environments that these animals would have inhabited.