ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] The only previous report of pre-Carboniferous vertebrate trackways is the speculation by Willard3 that enigmatic marks on some Upper Devonian shales from Pennsylvania were caused by tetrapods, but this has never been verified or widely accepted. Thus, the Genoa River trackways are the earliest yet ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/238469a0
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