Sierra del Alamo, Package 3, Sonora, Mexico (Triassic of Mexico)

Also known as Reef

Where: Sonora, Mexico (30.7° N, 112.6° W: paleocoordinates 14.6° N, 55.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Antimonio Formation, Rhaetian (208.5 - 201.3 Ma)

• Based on ammonites (Crickmayi Zone)

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified packstone and lithified, sandy limestone

• Tempestite or lag deposit
• bioclastic limestone (packstone, wackestone) siliclastic sandy limestone with some sandstone beds

Size class: macrofossils

Preservation: replaced with calcite

Collection methods: quarrying, peel or thin section,

• Only corals described in detail

Primary reference: G. D. Stanley, Jr. and C. M. Gonzalez-Leon. 1997. New Late Triassic scleractinian corals from the Antimonio Formation, northwestern Sonora, Mexico. Revista Mexicana de Ciencias Geologicas 14:202-207 [W. Kiessling/W. Kiessling/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34984: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 23.10.2003, edited by Sabine N├╝rnberg

Creative Commons license: CC BY (attribution)

Taxonomic list

 Lucinida - Lucinidae
Schafhaeutlia sp. Cossmann 1897 clam
 Ceratitida - Choristoceratidae
Choristoceras sp. Hauer 1865 ceratite
 Milleporina - Heterastrididae
Heterastridium sp. Reuss 1865 fire coral
 Scleractinia - Stylophyllidae
"Meandrostylis antimoniensis n. sp." = Maeandrostylis, Anthostylis sp., Anthostylis acanthophora
"Meandrostylis antimoniensis n. sp." = Maeandrostylis stony coral
Anthostylis sp. Roniewicz 1989 stony coral
Anthostylis acanthophora Frech 1890 stony coral
 Scleractinia - Cuifastraeidae
Cuifastraea granulata Melnikova 1983 stony coral