Ban Huai Yang (Jurassic to of Thailand)

Where: Changwat, Thailand (17.0° N, 103.6° E: paleocoordinates 15.0° N, 109.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Phu Kradung Formation, Tithonian to Tithonian (152.1 - 139.8 Ma)

Environment/lithology: fluvial; siltstone

• The Phu Kradung Formation, deposited in a fluvial system, is about 1000 m in thickness at the type locality. Its precise age is difficult to define, as the depositional environment lacks volcanic ash.
• Turtle shell fragments have been collected in a small creek from the weathering of maroon, micaceous mudstones. The turtle bearing-bed overlies the reddish micaceous mudstones interbedded with thin to medium bedded sandstones. Silcrete and petrified wood were also found below the turtle-bearing layer. The turtle layer is overlain by greyish medium to very thick bedded sandstones, calcareous siltstones, and thin bedded conglomerates in ascending order of the sequence.

Size class: macrofossils

Collection methods: he specimens studied herein are housed at the Sirindhorn Museum (SM), Kalasin and the Palaeontological Research and Education Centre (PRC), Mahasarakham University, Thailand.

Primary reference: H. Tong, P. Chanthasit, W. Naksri, P. Ditbanjong, S. Suteethorn, E. Buffetaut, V. Suteethorn, K. Wongko, U. Deesri and J. Claude. 2021. Yakemys multiporcata n. g. n. sp., a Large Macrobaenid Turtle from the Basal Cretaceous of Thailand, with a Review of the Turtle Fauna from the Phu Kradung Formation and Its Stratigraphical Implications. Diversity 13(12):1-18 [E. Vlachos/E. Vlachos]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 223808: authorized by Evangelos Vlachos, entered by Evangelos Vlachos on 02.12.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudines -
Basilochelys sp.
Basilochelys sp. Tong et al. 2009 turtle
 Testudines - Macrobaenidae
Yakemys multiporcata n. gen. n. sp.
Yakemys multiporcata n. gen. n. sp. Tong et al. 2021 turtle
Holotype: SM KS39, a partial shell; including incomplete neurals 4–5 and complete neurals 6–8, incomplete suprapygals 1–2, complete pygal; incomplete right costals 2–4 and left costal 5–6, left peripheral 2–11 (only the 8th and 10–11th are complete), and incomplete right peripherals 3–5 and 10–11; anterior lobe of the plastron including a small fragment of left epiplastron, complete entoplastron, part of right and left hyoplastra, and incomplete right hypoplastron, with both axillary and left inguinal buttresses. All belong to the same individual (Figure 2 and Figure 3A,B). Referred material: PRC151 (Field number PRC PK133, PK134, PK138), two incomplete costals from Phu Phan Kham locality, Non Sang, Nong Bua Lamphu Province (Figure 3C,D); PRC152, a posterior neural (Figure 3E); SM2021-1-131, a suprapygal 1 (Figure 3F); PRC153, a fragment of costal (Figure 3G), and other unnumbered shell fragments from Dan Luang locality, Mukdahan Province, Thailand; upper part of the Phu Kradung Formation, basal Cretaceous.