A manus dominated pterosaur track assemblage from Gansu,China: implications for behavior  

中国甘肃一例前足迹主导的翼龙足迹组合:对行为学的影响（英文）

作　　者：李大庆 邢立达 Martin G. Lockley Laura Pi uela 张建平 代辉 Jeong Yul Kim W. Scott Persons IV 孔得来 

机构地区：[1]Geological Museum of Gansu [2]School of the Earth Sciences and Resources, China University of Geosciences [3]Dinosaur Trackers Research Group, University of Colorado Denver, Denver, CO 80217, USA [4]Museo del Jura'sico de Asturias MUJA (Jurassic Museum of Asturias), 33328 Colunga, Spain [5]Department of Earth Science Education, Korea National University of Education, Cheongwon, Chungbuk 363-791,South Korea [6]Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, AB T6G 2E9, Canada [7]The Administrative Bureau of Liujiaxia Dinosaurs National Geopark

出　　处：《Science Bulletin》2015年第2期264-272,I0003,共10页科学通报（英文版）

基　　金：supported by the Liujiaxia Dinosaurs National Geopark;the 2013 Supporting Fund for Graduate Student’s Science and Technology Innovation from China University of Geosciences(Beijing),China

摘　　要：The Yangouxia dinosaur tracksites are well known for a diverse assemblage of tetrapod tracks preserved as natural impressions （concave epireliefs） on large bedding planes, representing a locally widespread surface marking the transition from a sand- to a mud-dominated sequence in the Hekou Group. Previous ichnological studies at these large sites have focused on the morphology and ichnotaxonomy of the tracks, including a single trackway representing the first pterosaur tracks reported from China. Here, we report a distinctly different assemblage associated with minor sandstones in the mud-dominated sequence 20 m above the main tracksite level. This assemblage consists of at least 20 pterosaur manus track casts attributed to a single ichnotaxon （Pteraichnus）. No pes tracks have been identified. These tracks mostly occur in random orientations, although one possible trackway segment is inferred, to represent walking progression.Manus-only pterosaur track assemblages are common and likely reflect differential registration depths of manus and pes and/or sub optimal preservation conditions. The tracks are associated with distinctive invertebrate traces including Cochlichnus, Spongeliomorpha and Paleophycus and suggest the pterosaurs were likely feeding on the invertebrate tracemakers.翼龙是已知的、最早飞上天际的脊椎动物,目前已经发现了成千上万件化石,代表着这一大家族从晚三叠世到晚白垩世在全球范围内的蓬勃发展史.自2004年甘肃盐锅峡地区首次报道翼龙足迹以来,中国陆续发现了一批翼龙足迹化石,绝大多数的足迹点都保存了翼龙的前后足迹.2013年,我们在盐锅峡地区发现了至少20个翼龙前足迹的凸型足迹,而没有发现任何后足迹,这些足迹可归于一个单独翼龙遗迹属——Pteraichnus.这是中国第一次发现由前足迹主导的翼龙足迹组合,这可能反映了翼龙前后足迹在同等保存条件下的不同深度.更重要的是,盐锅峡的这批翼龙足迹与当地发现的大量虫迹相关,一些足迹甚至就保存在虫迹面上,这些虫迹包括Cochlichnus,Spongeliomorpha和Paleophycus,因此推断这批翼龙造迹者很可能以这些无脊椎动物造迹者为食.

关 键 词：Early Cretaceous Gansu Province Yangouxia PTEROSAURS Pteraichnus LANZHOU Minhe Basin 

分 类 号：Q915[天文地球—古生物学与地层学]