宾夕法尼亚和西弗吉尼亚州下二叠世Dunkard群的pelycosauran - grade(羊水目:Synapsida)足印

IF 0.6 4区地球科学 Q4 PALEONTOLOGY

Annals of Carnegie Museum Pub Date : 2016-09-19 DOI:10.2992/007.083.0404

S. Lucas, Albert D. Kollar, D. Berman, A. Henrici

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引用次数: 13

摘要

下二叠纪Dunkard组已经获得了稀疏的四足动物足迹记录，分别属于Dimetropus Romer和Price(1940)、Dromopus Marsh(1894)和Limnopus Marsh(1894)。我们报告了两个新的Dimetropus，它们显著地将其在Dunkard组的地层范围扩展到Washington组和Greene组。此前唯一的双足龙Dunkard记录是D. berea (Tilton, 1931)，来自西弗吉尼亚州的Waynesburg组，是鱼属的模式鱼种。Dimetropus(真翼龙)，Dromopus(翼龙)和Limnopus(大型temnospondyl)足迹出现在许多晚宾夕法尼亚-早二叠纪足迹组合中。此处报道的Dimetropus的Dunkard脚印对于鱼属来说是非常大的，所以它们似乎是由相对较大的真翼龙之一留下的，Dimetrodon Cope, 1877年，Ophiacodon Marsh, 1878年，或Ctenospondylus Romer, 1936年，从Dunkard群的身体化石中得知。

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Pelycosaurian-Grade (Amniota: Synapsida) Footprints from the Lower Permian Dunkard Group of Pennsylvania and West Virginia

ABSTRACT The Lower Permian Dunkard Group has yielded a sparse record of tetrapod footprints that are assigned to the ichnogenera Dimetropus Romer and Price, 1940, Dromopus Marsh, 1894, and Limnopus Marsh, 1894. We report two new occurrences of Dimetropus that significantly extend its stratigraphic range in the Dunkard Group to the Washington and Greene formations. The only previous Dunkard record of Dimetropus is of D. berea (Tilton, 1931), the type ichnospecies of the ichnogenus, from the Waynesburg Formation of West Virginia. Dimetropus (eupelycosaur), Dromopus (araeoscelid), and Limnopus (large temnospondyl) footprints are present in many Late Pennsylvanian-Early Permian footprint assemblages. The Dunkard footprints of Dimetropus reported here are very large for the ichnogenus, so it seems likely they were made by one of the relatively large eupelycosaurs, Dimetrodon Cope, 1877, Ophiacodon Marsh, 1878, or Ctenospondylus Romer, 1936, known from Dunkard Group body fossils.

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来源期刊

Annals of Carnegie Museum 综合性期刊-动物学

CiteScore

2.50

自引率

18.20%

发文量

审稿时长

>12 weeks

期刊介绍： Annals of Carnegie Museum is a quarterly journal that publishes peer-reviewed short and medium-length original scientific contributions in organismal biology, earth sciences, and anthropology, in 40 by 52.5 pica format (168 by 220 mm or 6-5/8 by 8-5/8 inches). Subject matter must be relevant to Carnegie Museum of Natural History scientific sections or Powdermill Nature Reserve (PNR), preferably with connection to the Carnegie collection and/or personnel. Carnegie Museum staff and research associates receive publication priority, but others are encouraged to submit papers, especially those manuscripts explicitly based on the Carnegie collection.