Where: Chiapas, Mexico (17.1° N, 92.7° W: paleocoordinates 17.7° N, 89.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Balumtun Sandstone Formation (Rio Concepcion Group), Early/Lower Miocene (23.0 - 16.0 Ma)

• lower unit D

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: S. H. Frost and R. L. Langenheim, Jr. 1974. Cenozoic Reef Biofacies. Chicago, Northern Illinois University Press 1-388 [W. Kiessling/W. Kiessling/U. Merkel] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85800: authorized by Wolfgang Kiessling, entered by Uta Merkel on 16.01.2009