First report of lacertiform (lizard) tracks from the Cretaceous of Asia

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• 作者：Kyung Soo Kim^a ; Martin G. Lockley^b ; ^{Martin.Lockley@UCDenver.edu" class="auth_mail" title="E-mail the corresponding author} ; Jong Deock Lim^c ; Laura Pinuela^d ; Lida Xing^e ; Hae Won Moon^a
• 关键词：Cretaceous ; Korea ; Lizard ; Footprints
• 刊名：Cretaceous Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：69
• 期：Complete
• 页码：62-70
• 全文大小：2087 K

文摘

The well-preserved trackway of a lacertiform, lizard-like trackmaker from the Haman Formation (Cretaceous) of Korea is described as Neosauroides koreaensis ichnogen. et ichnosp. nov. This is the only example of a Cretaceous lacertiform or lizard-like trackway currently known in the global track record. Although lacertiform trackways, mostly assigned to the ichnogenus Rhynchosauroides, are common in the global Triassic, they are almost entirely absent in the Jurassic and Cretaceous. Moreover, ichnological classification criteria allow that Neosauroides is morphologically distinct from Rhynchosauroides at the genus level, and more like the tracks of the extant lizard Sceloporus. The reasons for the conspicuous lack of post-Triassic occurrences are not certain, but not due to a post-Triassic lack of potential lizard trackmakers. Thus, the preservation biases are likely due to paleobiological factors such as trackmaker ecology and paleoenvironmental preference.