Dashanpu Dinosaur Quarry [lower] (Jurassic to of China)

Also known as Dashanpu Town

Where: Sichuan, China (29.4° N, 104.9° E: paleocoordinates 29.0° N, 109.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lower Member (Shaximiao Formation), Bajocian to Bajocian (170.3 - 157.3 Ma)

• Based on detrital zircon U-Pb dating from this formation (but not this locality), Wang et al. (2018) suggested an Oxfordian age for the lower beds, rather than Middle Jurassic, with 159 ± 2 Ma as the maximum depositional age. However, from a section near the Dashanpu Dinosaur Quarry, Ren et al. (2022) documented the youngest age for the zircon sample as 166.0 ± 1.59 Ma, and weighed average ages of the youngest subpopulation under the constraints of 1σ and 2σ are 170.9 ± 0.64 Ma and 169.9 ± 0.63 Ma, with a maximum confidence age of 169.9 ± 0.63 Ma selected as the final result.

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; tabular, burrowed, micaceous sandstone and blue mudstone

• "a lake-shore shallow-bank deposit under low energy conditions"
• "micro-grained feldspatholithic sandstone, which is rich in mica fragments, matrix interstitial. Wave-ripple cross bedding, micro-wavy bedding and medium- to large-scale tabular cross bedding are clearly seen."

Size classes: macrofossils, mesofossils

Collected in 1972, 1974, 1977–1984

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: X. He, D. Yan, and C. Su. 1983. A new pterosaur from the Middle Jurassic of Dashanpu, Zigong, Sichuan. Journal of the Chengdu College of Geology 1:27-33 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24883: authorized by Matthew Carrano, entered by Matthew Carrano on 22.08.2002, edited by Philip Mannion, Roger Benson and Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus sp.17 Agassiz 1834 elasmobranch
ZDM 1005
Hybodus huangnidanensis17 Wang 1977 elasmobranch
ZDM 1004-j
Hybodus zigongensis n. sp.17 Peng et al. 2005 elasmobranch
ZDM 1004-a through ZDM 1004-i
Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodus zigongensis n. sp.17 lungfish
ZDM 1003
Amphibia
 Temnospondyli - Brachyopidae
Sinobrachyops placenticephalus n. gen. n. sp.1 Dong 1985 tetrapod
ZDM 2001 - holotype (skull, mandibles & several vertebrae)
Osteichthyes
 Therapsida - Tritylodontidae
Polistodon chuannanensis n. gen. n. sp.11 He and Cai 1984 mammaliamorph
ZDM T8601
Bienotheroides zigongensis n. sp.18 Sun 1986 mammaliamorph
ZDM 8602
Reptilia
 Plesiosauria - Rhomaleosauridae
Bishanopliosaurus youngi17 Dong 1980 plesiosaur
ZDM 4001
 Loricata - Goniopholididae
Sunosuchus shunanensis n. sp.6 Fu et al. 2005 crocodilian
ZDM 3401 - type (near complete skull)
 Loricata - Shartegosuchidae
Hsisosuchus dashanpuensis n. gen. n. sp.8
Hsisosuchus dashanpuensis n. gen. n. sp.8 Gao 2001 crocodilian
ZDM 3405, holotype partial skeleton
 Pterosauria - Rhamphorhynchidae
Angustinaripterus longicephalus n. gen. n. sp. He et al. 1983 pterosaur
ZDM T8001, single incomplete skull
 Theropoda - Metriacanthosauridae
"Szechuanosaurus zigongensis n. sp." = Yangchuanosaurus zigongensis7
"Szechuanosaurus zigongensis n. sp." = Yangchuanosaurus zigongensis7 Gao 1993 allosauroid
ZDM 9011–9015
 Theropoda -
Chuandongocoelurus primitivus n. gen. n. sp.9, Gasosaurus constructus n. gen. n. sp.4
Chuandongocoelurus primitivus n. gen. n. sp.9 He 1984 tetanuran theropod
CCG 20010
Gasosaurus constructus n. gen. n. sp.4 Dong and Tang 1985 tetanuran theropod
IVPP V.7264, V.7265; ZDM 9008
 Saurischia -
Sauropoda indet.17 sauropod
ZDM 5032, 3 dorsals
 Saurischia - Cetiosauridae
"Protognathus oxyodon n. gen. n. sp." = Protognathosaurus oxyodon23
"Protognathus oxyodon n. gen. n. sp." = Protognathosaurus oxyodon23 Zhang 1988 first jaw lizard
CV 00732
 Saurischia -
Dashanpusaurus dongi n. gen. n. sp.17, Shunosaurus lii n. gen. n. sp.5, Datousaurus bashanensis n. gen. n. sp.3
Dashanpusaurus dongi n. gen. n. sp.17 Peng et al. 2005 sauropod
ZDM 5028 - holotype (incomplete skeleton including 6 cervicals, 12 dorsals, 4 sacrals, 33 caudals, left ulna, pelvic girdle and hindlimb; ZDM 5027 - paratype (incomplete skeleton including 12 dorsals, some ribs, left pectoral girdle, left humerus and radius)
Shunosaurus lii n. gen. n. sp.5 Dong et al. 1983 sauropod
ZDM L033, L034, 5006, T5401–5403
Datousaurus bashanensis n. gen. n. sp.3 Dong and Tang 1984 sauropod
ZDM 5021. IVPP V7262-V7263, CV 00740
 Saurischia - Mamenchisauridae
Mamenchisauridae indet.17 mamenchisaurid
ZDM 5031, dorsal
Omeisaurus jiaoi n. sp.13 Jiang et al. 2011 mamenchisaurid
ZDM 5050
Omeisaurus tianfuensis n. sp.12 He et al. 1984 mamenchisaurid
ZDM 5005, 5007, 5046, 5701 (fied. no. II-C-9, II-E), 5702 (field no. I-U), 5703 (field no. I-N-1), 5704 (field no. I-J), 5705 (field no. AF), 5706 (field no. I-Y), 5707 (field no. I-A), 5708 (field no. I-G), 5709 (field no. I-Z), 5710 (field no. I-N2)
Abrosaurus dongpoensis n. gen. n. sp.15 Ouyang 1989 mamenchisaurid
ZDM 5038, 5033
 Ornithischia -
Agilisaurus louderbacki n. gen. n. sp.16, Stegosauria indet.14, Huayangosaurus taibaii n. gen. n. sp., "Yandusaurus multidens n. sp." = Hexinlusaurus multidens10
Agilisaurus louderbacki n. gen. n. sp.16 Peng 1990 ornithischian
ZDM 6011
Stegosauria indet.14 ornithischian
ZDM T7002, CV 720, 721
Huayangosaurus taibaii n. gen. n. sp. Dong et al. 1982 ornithischian
IVPP 6728, ZDM T7001, T7002, T7004, T7008, 7010; CV 00720, 00721
"Yandusaurus multidens n. sp." = Hexinlusaurus multidens10 He and Cai 1983 ornithischian
ZDM 6001, T6002
 Ornithischia - Fabrosauridae
Xiaosaurus dashanpensis n. gen. n. sp.2
Xiaosaurus dashanpensis n. gen. n. sp.2 Dong and Tang 1983 small lizard
IVPP 6730A (field no. Cr. 003), 6730B; ZDM 6015
 Testudinata -
Testudinata indet.19 Oppel 1811 turtle
I-L1 (whereabouts unknown), ZDM 3019 (field no.: I-L2), ZDM 3005 (field no.: KI7)
Chengyuchelys zigongensis n. sp.21 Yeh 1982 turtle
CV 00678 (holotype); Yeh (1990) additionally referred I-Z1 (ZDM 3012)
 Testudines - Xinjiangchelyidae
Protoxinjiangchelys sp.19 Tong et al. 2012 turtle
CV 00679
Protoxinjiangchelys salis n. gen. n. sp.19 Tong et al. 2012 turtle
ZDM7 partial shell' (ZDM 3006); ZDM 3009 a complete plastron with relatively well-preserved gular and intergular scales
 Testudines - Bashuchelyidae
Bashuchelys sp.19, Bashuchelys sp.19, Bashuchelys youngi n. sp.19, Bashuchelys youngi19, "Chengyuchelys dashanpuensis n. sp." = Chuannanchelys dashanpuensis22
Bashuchelys sp.19 Tong et al. 2012 turtle
ZDM3004
Bashuchelys sp.19 Tong et al. 2012 turtle
ZDM3002 preserves only the central and posterior carapace. Original records state that it was collected in November of 1983 within the vicinity of the sacrum of Omeisaurus tianfuensis and was provided an excavation number of I-J. ZDM3001, plastron and carapace
Bashuchelys youngi n. sp.19 Tong et al. 2012 turtle
ZDM 3003, ZDM 1 (ZDM 3007), and ZDM 3 (ZDM 3008); IVPP V8805 removed to Sichuanchelys by Tong et al. (2012)
Bashuchelys youngi19 Tong et al. 2012 turtle
Because specimen V6507 is represented only by the anterior 1/3 of its carapace as described and diagnosed by Yeh (1982), it is regarded as indeterminate to species and hereby omitted from Chengyuchelys baenoides
"Chengyuchelys dashanpuensis n. sp." = Chuannanchelys dashanpuensis22 Fang 1987 turtle
Dashanpu excavation number I-T19 (ZDM 3011)
 Testudinata - Sichuanchelyidae
Sichuanchelys sp.19 Ye and Pi 1997 turtle
IVPP V8805
Sichuanchelys chowi n. gen. n. sp.20 Ye and Pi 1997 turtle
ZDM 3014 (holotype shell), 3017, 3001 (partial shells)
Actinopteri
 Lepisosteiformes -
Lepidotes dashanpuensis n. sp.17 Peng et al. 2005 gar
ZDM 1001