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Ichnologic Note A New Ichnospecies of Cardioichnus from the Cretaceous (Albian) of New Mexico
Ichnos ( IF 0.8 ) Pub Date : 2018-06-27 , DOI: 10.1080/10420940.2018.1482215
Eric J. Kappus 1 , Spencer G. Lucas 2
Affiliation  

ABSTRACT A new ichnospecies of Cardioichnus, Cardioichnus biloba isp. nov., is described and documented from shallow marine strata of Cretaceous (Late Albian) age in southern New Mexico, USA. It is a heart-shaped resting trace which, unlike all other ichnospecies of Cardioichnus, is epichnial and increases in width to a bilobate trace, often with a raised anterior terminus. Only the posterior end of this trace is associated with Bichordites burrows, and the anterior end is bilobate and undisturbed. This represents a resting position which differs from other known species of this cubichnium, which are hypichnial and subquadrate in symmetry. The tracemaker is a spatangoid echinoid, most likely Heteraster d'Orbigny, 1853.

中文翻译:

Ichnologic Note 新墨西哥白垩纪(Albian)Cardioichnus 的一个新的Ichnospecies

摘要 Cardioichnus 的一个新物种, Cardioichnus biloba isp。11 月,是从美国新墨西哥州南部白垩纪(晚阿尔比安)时代的浅海相地层中描述和记录的。它是一个心形的静止痕迹,与 Cardioichnus 的所有其他鱼种不同,它是上皮的并且宽度增加到双叶状痕迹,通常具有凸起的前端。只有这条痕迹的后端与 Bichordites 洞穴相关,并且前端是双叶状且不受干扰。这代表了一个静止位置,它不同于这种立方体的其他已知物种,后者在对称性上是近方形的。示踪器是一种 spatangoid 海胆,最有可能是 Heteraster d'Orbigny,1853 年。
更新日期:2018-06-27
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