Khok Pha Suam (Cretaceous to of Thailand)

Also known as Khok Pa Suam

Where: Ubon Ratchathani, Thailand (15.2° N, 104.9° E: paleocoordinates 16.0° N, 113.0° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Khok Kruat Formation (Khorat Group), Aptian to Aptian (125.0 - 100.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: fluvial; brown, red claystone and fine-grained, medium, brown, red sandstone

• "a meandering system deposit"
• "The deposits exposed at Khok Pha Suam locality are of reddish brown color, very thin to thin bedded claystone grading up to thin bedded siltstone interbedded with fine- to medium- grained sandstone. Sandstone beds are micro-crossbedded. A calcrete horizon (paleosol) has been found at the top of the succession."

Size classes: macrofossils, mesofossils

Collected by S. Chandharukkha in 1997–1999, 2005, 2021

Collection methods: surface (in situ),

• "The site was discovered by a local teacher, Mr. Skolwathn Chandharukkha, and has been explored between 1997 and 1999 by a Thai-French expedition led by the Department of Mineral Resources Thailand and Centre national de la recherche scientifique, France"

Primary reference: E. Buffetaut, V. Suteethorn, H. Tong, Y. Chaimanee, and S. Khansubha. 1997. New dinosaur discoveries in the Jurassic and Cretaceous of northeastern Thailand. Proceedings of the International Conference on Stratigraphy and Tectonic Evolution of Southeast Asia and the South Pacific, 19-24 August 1997, Bangkok 177-187 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 52346: authorized by Matthew Carrano, entered by Matthew Carrano on 03.08.2005, edited by Mark Bell and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Thecophora - Trionychoidae
Trionychoidae indet.8 Hay 1930 turtle
 Testudines - Carettochelyidae
Kizylkumemys khoratensis7 Tong et al. 2005 turtle
 Testudines -
"Chelonia indet." = Testudines1
"Chelonia indet." = Testudines1 Batsch 1788 turtle
 Loricata -
Neosuchia indet.8 Clark 1988 crocodilian
 Loricata - Goniopholididae
Goniopholididae indet.8 Cope 1875 crocodilian
SM2021-1-112
 Ornithischia -
Iguanodontia indet.9 Baur 1891 ornithopod
"teeth and postcranial bones"
 Theropoda -
Theropoda indet.2 Marsh 1881 theropod
 Theropoda - Spinosauridae
Spinosauridae indet.10 Stromer 1915 tetanuran theropod
teeth
 Saurischia -
Macronaria indet.8 Sereno 1997 sauropod
teeth
 Pterosauria -
Pterosauria indet.8 Kaup 1834 pterosaur
PRCMR317 (Tooth)
Actinopteri
 Semionotiformes - Semionotidae
Semionotidae indet.5 Woodward 1890
thousands of scales
 Holostei -
 Lepisosteiformes -
Lanxangichthys sp.4 Cavin et al. 2019 gar
An isolated infraorbital belonging to the seriesanterior to the orbit (PRC 65), and an indeterminate skullroof bone (PRC 66)
Osteichthyes
 Halecomorphi - Sinamiidae
cf. Siamamia sp.8 Cavin et al. 2007 ray-finned fish
TF 8029-8032
Chondrichthyes
 Hybodontiformes - Hybodontidae
Heteroptychodus steinmanni6 Yabe and Obata 1930 elasmobranch
170 partial teeth: TF 7647-50, TF 7679,
Heteroptychodus steinmanni8 Yabe and Obata 1930 elasmobranch
Hybodus aequitridentatus6 Cuny et al. 2008 elasmobranch
Thaiodus ruchae3 Cappetta et al. 1990 elasmobranch
PRCMR301
 Hybodontiformes -
Acrorhizodus khoratensis n. gen. n. sp.3
Acrorhizodus khoratensis n. gen. n. sp.3 Cappetta et al. 2006 elasmobranch
Holotype: SDRC 17; PRCMR305
Khoratodus foreyi
  -
Khoratodus foreyi6 Cuny et al. 2008
Holotype: TF 7680; PRCMR302