Fig 1.
Photograph (A) and proposed future reconstruction (B) of the Lotus tracksite, China.
Illustration by Zhongda Chuang.
Fig 2.
Plan view map of the Lotus tracksite (A) and stratigraphic sections of the Qijiang Lotus tracksite (B).
Fig 3.
Map of track-bearing levels at QI and II of the Lotus tracksite.
Fig 4.
Representative dinosaur tracks from the Lotus tracksite.
An ornithopod track cast (A) and sauropod track cast (B) from QIII, ornithopod track mold and cast (C and D respectively) from QIV, ornithopod track casts (E and F) from QV, ornithopod track casts (G and H) from QVI, ornithopod track casts (F, I–K) from QVII.
Fig 5.
Interpretative outline drawing of large-sized ornithopod trackways from QII, Lotus tracksite, Qijiang, China.
Holotype shown in box of trackway QII-O20.
Fig 6.
Photographs, interpretative outline drawings and 3D height maps (warm colours are high, cooler colours are low) of well-preserved ornithopod tracks from the Lotus tracksite.
Table 1.
Measurements (in cm) of ornithopod tracks from the Lotus tracksite, Chongqing Municipality, China.
Table 2.
Measurements (in cm) of isolated ornithopod tracks from the Lotus tracksite, Chongqing Municipality, China.
Fig 7.
Interpretative outline drawings of small-sized ornithopod trackways from QII, Lotus tracksite, Qijiang, China.
Fig 8.
Interpretative map based on drawings of small-sized ornithopod trackways from QIII, Lotus tracksite, Qijiang, China.
Note that specimens UCM 214.258–214.260 are preserved as replicas in the University of Colorado collections.
Fig 9.
Scatter diagram of track length and width (A); length and mesaxony (B) in Caririchnium tracks from the Lotus tracksite.
Table 3.
Summary of size data for Caririchnium lotus from theLotus tracksite, Qijiang, Chongqing Municipality, China.
(n = 140).
Table 4.
Summary of size (cm) and mesaxony data for Caririchnium lotus from the Lotus tracksite, Qijiang, Chongqing Municipality, China.
Fig 10.
Interpretative outline drawings of Caririchnium drawn to the same scale (modified after Lockley et al.[31]).
A, Carirchnium magnificum [32]; B, Caririchnium leonardii [33]; C, Caririchnium protohadrosaurichnos [46]; D, Caririchnium lotus [2], and E, Caririchnium kyoungsookimi [47].
Fig 11.
Interpretative outline drawings of Early Cretaceous Caririchnium tracks from China.
A, Caririchnium isp. from Jiufotang Formation, Luanping tracksite, Hebei Province [55–56]; B, Caririchnium type from Tongfosi Formation, Tongfosi tracksite, Jilin Province [57]; C, Caririchnium from Hekou group, Yanguoxia tracksite No. II, Gansu Province; D, Caririchnium type from Hekou group, Yanguoxia tracksite No. I [58]; E, Caririchnium from Hekou group, SS1 site, Gansu Province [59]; F, Caririchnium from Jiaguan Formation, Longjing tracksite, Sichuan Province [76]; G and H, Caririchnium from Feitianshan Formation, Zhaojue tracksites, Sichuan Province [8]; I and J, this text. Scale bar = 10 cm.
Table 5.
Estimated data of the speed of Lotus ornithopod trackmakers.
Fig 12.
Photographs and interpretative outline drawings of ornithopod tracks and undertracks from the Lotus tracksite.
These extramorphological variants of C. lotus formed the basis for two ichnospecies, which we reject here as nomina dubia. See text for details.
Fig 13.
Photograph (A), 3D height maps (B–D) and interpretative outline drawing (E) of complexly overprinted ornithopod track series QIII-OI1–9 from the Lotus tracksite.
Fig 14.
Photograph (A), 3D height map (B) and interpretative outline drawing (C) of complexly overprinted ornithopod track series QIII-OI10–16 from the Lotus tracksite.
Fig 15.
Interpretative outline drawings of sauropod trackway (A) and isolated pes-manus prints (B) from QI.
Photograph (C, D, E and G) of sauropod casts from QVI. Close-up photographs (F, H) show details with striation marks. Dotted line indicates outline of undertracks. Arrow indicates moving direction of tracks.
Table 6.
Measurements (in cm) of the sauropod tracks from Lotus tracksite, Chongqing Municipality, China.
Fig 16.
Interpretative outline drawing of bird trackways from the Lotus tracksite.
Fig 17.
Photograph (A and C) and interpretative outline drawings (B and D) of possible theropod tracks from the Lotus tracksite.
Table 7.
Rank abundance of trackmakers by stratigraphic frequency of occurrence and total number of trackways (T) and isolated tracks (I).