Mab Ching (Jurassic of Thailand)

Where: Changwat Nakhon Si Thammarat, Thailand (8.2° N, 99.7° E: paleocoordinates 8.1° N, 111.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Middle Jurassic (174.1 - 163.5 Ma)

• a good section exposes alternating grey and brown clays and limestone beds. According to M. Feist (Montpellier), charophytes from that locality (including Porochara sublaevis) suggest a Middle Jurassic age

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; brown, gray claystone and limestone

• The whole assemblage is suggestive of a lacustrine environment
• alternating grey and brown clays and limestone beds

Size class: macrofossils

Collected in 1993, 1994, 1996

Collection methods: surface (float), surface (in situ),

• The Mab Ching locality was discovered by L. Raksaskulwong in 1993. Field work there in 1993, 1994 and 1996 yielded abundant vertebrate remains

•The specimens studied in this paper are housed in the collection of the Geological Survey Division, Department of Mineral Resources (DMR), Bangkok, Thailand.

Primary reference: H. Tong, E. Buffetaut, and V. Suteethorn. 2002. Middle Jurassic turtles from southern Thailand. Geological Magazine 139(6):687-697 [R. Benson/R. Benson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 137735: authorized by Roger Benson, entered by Roger Benson on 18.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodontidae indet. Agassiz 1843 elasmobranch
a spine of a large hybodont shark
Actinopteri
 Lepisosteiformes -
cf. Lepidotes indet. Agassiz 1843 gar
scales of Lepidotes-like actinopterygian fish
Osteichthyes
 Dipnoi -
Dipnoi indet. lungfish
lungfish toothplates
 Temnospondyli -
Temnospondyli indet. von Zittel 1887 tetrapod
Temnospondyl intercentra (TF 3228 and 3229)
Reptilia
 Testudinata -
Siamochelys peninsularis n. gen. n. sp.
Siamochelys peninsularis n. gen. n. sp. Tong et al. 2002 turtle
Holotype partial skeleton (TF 7635); a shell (TF 7636), and partial shell (TF 7637)
 Loricata -
Mesosuchia indet. Huxley 1875 crocodilian
vertebrae, scutes and teeth of mesosuchian crocodiles