A new Dromaeosauripus (Dinosauria: Theropoda) ichnospecies from the Lower Cretaceous Hekou Group, Gansu Province, China

Diverse dinosaur ichnoassemblages from the Lower Cretaceous Dasheng Group in the Yishu fault zone, Shandong Province, China

“…This is faster than that of Dromaeosauripus yongjingensis (0.75 m/s, Xing et al, 2012), slower than that of Dromaeopodus shandongensis (1.63 m/s; Li et al, 2007;Kim et al, 2008), and much slower than Dromaeosauripus hamanensis (4.86 m/s, Kim et al, 2008).…”

“…Generally, the Jishan tracks are similar to Dromaeosauripus (Kim et al, , 2012Xing et al, 2012) based on the following characteristics: (1) similar size in comparison with D. yongjingensis and D. hamanensis; (2) claw marks large and discernible in comparison with D. jinjuensis and D. hamanensis; (3) digit II present only as an inconspicuous posteromedial trace associated with the impression of the proximal part of digit III, see D. yongjingensis; (4) large semicircular, metatarsophalangeal region, similar to D. yongjingensis.…”

“…A considerable size range is represented by these tracks: they include small sized-tracks (mean pes length 10 cm) such as Velociraptorichnus sichuanensis (Zhen et al, 1994;Xing et al, 2009), Velociraptorichnus isp. , Menglongipus sinensis (Xing et al, 2009), and Dromaeosauripus jinjuensis (Kim et al, 2012); medium-sized tracks (mean pes length 15 cm) such as Dromaeosauripus hamanensis , Dromaeosauripus yongjingensis (Xing et al, 2012), and 21 cm-long didactyl tracks from Utah labelled Dromaeopodus (Cowan et al, 2010;Lockley et al, 2013); large-sized tracks (mean pes length of about 30 cm) such as Dromaeopodus shandongensis .…”

“…The medium-sized grallatorid Paragrallator (Li and Zhang, 2000;Xing et al, 2010a,b), the robust tridactyl theropod track Corpulentapus , a pterosaur track attributed to Pteraichnus isp., and unnamed tridactyl theropod tracks from Jimo City (Xing et al, 2012) are also known from the Laiyang Group. The Huanglonggou tracksite of the Laiyang Group near Zhucheng, where more than 2000 tracks have been mapped (Lockley et al, 2012a,b) is particularly spectacular, with an ichnofauna that is saurischian-dominated.…”

“…A. Menglongipus(Xing et al, 2009); B. Velociraptorichnus from Shandong; C. Velociraptorichnus(Zhen et al, 1994;Xing et al, 2009); D. Dromaeosauripus jinjuensis(Kim et al, 2012); E. Dromaeosauripus yongjingensis(Xing et al, 2012); F. Dromaeosauripus hamanensis; G. Jishan didactyl tracks (this study); H. Dromaeopodus shandongensis.…”