Benner and Knecht presented their find in September at the Second International Congress on ichnology-the study of fossilized animal tracks-in Krakow, Poland.
九月份，在波兰克拉科夫举行的第二届国际化石足迹学会议上，Benner和Knecht展示了他们的发现。
Benner and Knecht presented their find in September at the Second International Congress on ichnology-the study of fossilized animal tracks-in Krakow, Poland.
九月份，在波兰克拉科夫举行的第二届国际化石足迹学会议上，Benner和Knecht展示了他们的发现。
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