USGS 8835, Threemile Cove, Gravina Island (Triassic of the United States)

Also known as G.C.M.-7

Where: Alaska (55.2° N, 131.8° W: paleocoordinates 0.1° S, 70.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lacian (221.5 - 215.6 Ma)

Environment/lithology: lithified limestone and lithified shale

• Thin-bedded limestone interbedded with shale.

Size class: macrofossils

Collected by Martin and Overbeck

Primary reference: J. P. Smith. 1927. Upper Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 141:1-262 [D. Bottjer/C. Powers/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 112237: authorized by Arnold Miller, entered by Sarah Kolbe on 07.07.2011, edited by Matthew Clapham and Catherine Powers

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Trigoniida - Myophoriidae
? Myophoria sp.
? Myophoria sp. Bronn 1834 clam
Gastropoda
 Sorbeoconcha - Naticidae
"Natica" sp.
"Natica" sp. Scopoli 1777 moon snail
 Pseudomelanoidea - Pseudomelaniidae
? Pseudomelania sp.
? Pseudomelania sp. Pictet and Campiche 1862 snail
 Cerithioidea - Turritellidae
? Turritella sp.
? Turritella sp. Lamarck 1799 turret shell
Cephalopoda
 Ceratitida - Trachyceratidae
? Trachyceras sp.
? Trachyceras sp. Laube 1869 ceratite
Rhynchonellata
 Spiriferinida - Spiriferinidae
? Spiriferina sp.
? Spiriferina sp. d'Orbigny 1847
Anthozoa
 Scleractinia - Pamiroseriidae
"Isastrea parva" = Ceriostella parva, "Confusastrea cowichanensis" = Ampakabastraea cowichanensis
"Isastrea parva" = Ceriostella parva Smith 1927 stony coral
"Confusastrea cowichanensis" = Ampakabastraea cowichanensis Clapp and Shimer 1911 stony coral
Included in synonymy of K. decussata and K. cowichanensis by Stanley & Whalen, 1989
 Scleractinia - Reimaniphylliidae
"Montlivaultia norica" = Distichophyllia norica, "Confusastrea decussata" = Kuhnastraea decussata
"Montlivaultia norica" = Distichophyllia norica Frech 1890 stony coral
"Confusastrea decussata" = Kuhnastraea decussata Reuss 1854 stony coral
 Scleractinia - Stylophyllidae
"Isastrea vancouverensis" = Meandrostylis vancouverensis
"Isastrea vancouverensis" = Meandrostylis vancouverensis Clapp and Shimer 1911 stony coral
 Scleractinia - Gablonzeriidae
"Isastrea profunda" = Gablonzeria profunda
"Isastrea profunda" = Gablonzeria profunda Reuss 1854 stony coral
Hydrozoa
 Spongiomorphida - Spongiomorphidae
Spongiomorpha (Heptastylopsis) gibbosa, Spongiomorpha (Heptastylopsis) ramosa