Pac Ma Formation, Song Da Basin, NW Vietnam (Triassic of Vietnam)

Also known as Reef 3040

Where: Vietnam (21.5° N, 104.0° E: paleocoordinates 21.6° N, 87.8° E)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Pac Ma Formation, Tuvalian (232.0 - 221.5 Ma)

• 120-200 m thick, limited areal distribution. Late Carnian.

• formation-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks

Size class: macrofossils

Primary reference: V. Khuc. 2000. The Triassic of Indochina Peninsula and its interregional correlation. Permian-Triassic Evolution of Tethys and Western Circum-Pacific 221-233 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 44770: authorized by David Bottjer, entered by Matthew Clapham on 17.09.2004, edited by Bethany Allen and Benjamin Brenneis

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Terebratulida - Aulacothyropsidae
Aulacothyropsis bisinuata
 Terebratulida - Angustothyrididae
Rhaetina bamaensis, Rhaetina complanata
Cephalopoda
 Ceratitida - Tropitidae
Paratropites sp.1
Paratropites sp.1 Mojsisovics 1893 ceratite
 Ceratitida - Tropiceltitidae
Tornquistites sp.
Tornquistites sp. Hyatt and Smith 1905 ceratite
Bivalvia
 Ostreida - Halobiidae
Halobia pacmaensis n. sp.1, "Zittelihalobia cf. rugosa" = Halobia (Zittelihalobia)1
Halobia pacmaensis n. sp.1 Vu Khuc 1991 oyster
"Zittelihalobia cf. rugosa" = Halobia (Zittelihalobia)1 oyster
Anthozoa
 Scleractinia - Reimaniphylliidae
Distichophyllia norica2
Distichophyllia norica2 Frech 1890 stony coral
 Scleractinia - Gablonzeriidae
"Isastrea profunda" = Gablonzeria profunda
"Isastrea profunda" = Gablonzeria profunda Reuss 1854 stony coral
 Scleractinia - Montlivaltiidae
"Thecosmilia" sp.1
"Thecosmilia" sp.1 Milne-Edwards and Haime 1848 stony coral
1Komatsu et al. 2017; 2Stanley, jr and Whalen 1989