MorphoMuseuM 3D object

M3#1982

All footprints in Fig. 6 are tridactyl theropod footprints assigned to Morphotype I and tentatively identified as Eubrontes-like. Fig. 6 (Hongyangoukou Slab 1) preserves at least 31 footprints, comprising seven trackways (HYGK-T1–T7) and 15 isolated footprints (HYGK-TI1–TI15). They are preserved as natural molds in reddish-brown siltstone and are heavily weathered, but they generally retain distinct tridactyl outlines and U- or V-shaped metatarsophalangeal regions. Claw impressions are present in some specimens (e.g., T3, T7-L1, and TI9), whereas digital pad impressions are absent. Footprint length ranges from 10.8 to 20.9 cm (mean ≈16.0 cm); the length-to-width ratio ranges from 1.1 to 1.7 (mean ≈1.4); mesaxony is weak (mean ≈0.47); and the divarication angle between digits II and IV ranges from 41° to 73° (mean ≈60°). The stride lengths of T1, T3, T4, and T6 are 144.5, 104.8, 122.3, and 64.5 cm, respectively, corresponding to 9.7, 5.6, 9.4, and 3.3 times their respective mean footprint lengths. T1 and T5 show outward rotations of about 4° and 9°, respectively. T3 is among the best-preserved examples, with digit III the longest and stoutest, digit IV the shortest, and clear claw impressions present on digits II and III, whereas TI10 is a complete tridactyl track. These footprints are therefore small theropod tracks of Morphotype I, tentatively assigned to Eubrontes-like.

Model solid/transparent

Specimen infos

Collection

Collection : Huangjing Forest National Forest Park, Hunan, China

Inventory number : HYGK Slab 1

Information

Sex : indet

Age (if applicable) :

Material Type : track

Origin :

Taxonomy

Class : Sauropsida

Order : Saurischia

Family : Eubrontidae

Genus : Eubrontes

Species :✝isp.

Description

All footprints in Fig. 6 are tridactyl theropod footprints assigned to Morphotype I and tentatively identified as Eubrontes-like. Fig. 6 (Hongyangoukou Slab 1) preserves at least 31 footprints, comprising seven trackways (HYGK-T1–T7) and 15 isolated footprints (HYGK-TI1–TI15). They are preserved as natural molds in reddish-brown siltstone and are heavily weathered, but they generally retain distinct tridactyl outlines and U- or V-shaped metatarsophalangeal regions. Claw impressions are present in some specimens (e.g., T3, T7-L1, and TI9), whereas digital pad impressions are absent. Footprint length ranges from 10.8 to 20.9 cm (mean ≈16.0 cm); the length-to-width ratio ranges from 1.1 to 1.7 (mean ≈1.4); mesaxony is weak (mean ≈0.47); and the divarication angle between digits II and IV ranges from 41° to 73° (mean ≈60°). The stride lengths of T1, T3, T4, and T6 are 144.5, 104.8, 122.3, and 64.5 cm, respectively, corresponding to 9.7, 5.6, 9.4, and 3.3 times the mean footprint length. T1 and T5 show outward rotations of about 4° and 9°, respectively. T3 is among the best-preserved examples, with digit III the longest and stoutest, digit IV the shortest, and clear claw impressions present on digits II and III, whereas TI10 is a complete tridactyl track. These footprints are therefore small theropod tracks of Morphotype I, tentatively assigned to Eubrontes-like.

M3#1982

3D models related to the publication: New Cretaceous dinosaur track sites from the Jiaguan Formation, Sichuan Province, China: ichnotaxonomy and preservation

Lida Xing, Jens N. Lallensack, Junhong Mou, Lin Liu, Shan Jiang, Qi Qi, Anthony Romilio, Yong Ye, Xin Shen and Ting Xu