Where: Thailand (16.7° N, 98.7° E: paleocoordinates 14.9° N, 105.0° E)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Brasilia bradfordensis ammonoid zone, Khun Huai Formation (Hua Fai Group), Middle Aalenian (175.6 - 171.6 Ma)
• Tak zinc mine sequence Level 1: 5m above the base. PJW: Was entered as Early/Lower Toarcian, but papers indicate Middle Aalenian Bradfordensis zone
• bed-level stratigraphic resolution
Environment/lithology: coastal; sandy mudstone and muddy sandstone
Size class: macrofossils
Primary reference: T. Kozai, F. Hirsch, K. Ishida and A. Meesook. 2006. Faunal affinity of Toarcian-Aalenian (Early Jurassic) bivalves from Mae Sot and Umphang (Tak Province), Northwestern Thailand. Geosciences Journal 10(3):205-215 [W. Kiessling/M. Nimke]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 87467: authorized by Wolfgang Kiessling, entered by Madeleine Nimke on 18.03.2009, edited by Daniel Wellmanns
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Riccardiceras longalvum Vacek 1886 ammonite | |
Malladaites aff. pertinax Vacek 1886 ammonite
Abbasites sp. Buckman 1921 ammonite | |
Gastropoda | |
Vacekia sp. Conti and Szabó 1989 top snail | |
Bivalvia | |
Modiolus sestiniae mussel
Mytilus aff. heranius mussel | |
Lima cf. wynnei file clam
Lima cf. callovica file clam | |
Entolium aff. lunare Roemer 1839 scallop | |
Thaumatoporella parvovesiculifera Raineri 1922 |