Sentences with phrase «terrestrial vertebrate fossils»
The studies» analysis of sedimentary layers deposited with early terrestrial vertebrate fossils established that portions of our distant ancestors» environment dried out seasonally, but year - round much of it was, yep, a swamp.
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The belief in five digits as an ancestral character has even extended to fossil reconstructions of Ichthyostega, one of the earliest terrestrial vertebrates from the Devonian (about 390 to 340 million years ago).