Phu Sung (Cretaceous of Thailand)

Where: Sakon Nakhon, Thailand (17.1° N, 104.2° E: paleocoordinates 15.7° N, 112.2° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Sao Khua Formation (Khorat Group), Late/Upper Barremian (130.0 - 125.5 Ma)

• Non-marine bivalves suggest the Sao Khua Formation is late Barremian in age (Tumpeesawan et al. 2010; Samathi et al. 2019)

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; red, silty mudstone

• "low energy quiet environment (overbank, small pond or oxbow lake margin)"
• Fossils found in situ from reddish silty mudstone which is underlain and overlain by sandstone beds.

Size classes: macrofossils, mesofossils

Collected by W. Tongsiri in 2018

Collection methods: surface (in situ),

Primary reference: P. Chanthasit, S. Suteethorn, W. Naksri, H. Tong, K. Wongko and T. Sonoda. 2019. New vertebrate fossil site from the Early Cretaceous Sao Khua Formation, Sakon Nakhon Province, northeastern Thailand. Open Journal of Geology 9:619-622 [E. Vlachos/E. Vlachos/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 204916: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 25.09.2019, edited by Matthew Carrano and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Chondrichthyes
 Hybodontiformes - Hybodontidae
? Heteroptychodus sp.
? Heteroptychodus sp. Yabe and Obata 1930 elasmobranch
tooth
Osteichthyes
 Halecomorphi - Sinamiidae
? Siamamia sp.
? Siamamia sp. Cavin et al. 2007 ray-finned fish
maxilla
Reptilia
 Squamata -
Lacertilia indet.1
Lacertilia indet.1 lizard
"lizard eggs" fragmentary
 Pterosauria -
Pterosauria indet.1
Pterosauria indet.1 Kaup 1834 pterosaur
 Dinosauria -
Dinosauria indet.
Dinosauria indet. dinosaur
large bone fragments
 Theropoda -
Theropoda indet.
Theropoda indet. theropod
large tooth, claws
 Theropoda - Spinosauridae
Spinosauridae indet.
Spinosauridae indet. Stromer 1915 tetanuran theropod
tooth
 Saurischia - Euhelopodidae
cf. Phuwiangosaurus sirindhornae
cf. Phuwiangosaurus sirindhornae Martin et al. 1994 euhelopodid
tooth
 Loricata - Atoposauridae
Varanosuchus sakonnakhonensis n. gen. n. sp.2
Varanosuchus sakonnakhonensis n. gen. n. sp.2 Pochat-Cottilloux et al. 2024 crocodilian
skull and skeleton
 Testudines - Adocidae
cf. Isanemys srisuki
cf. Isanemys srisuki Tong et al. 2006 turtle
1Ditbanjong et al. 2019; 2Pochat-Cottilloux et al. 2024