Protothurmannia rezanoffiana type locality (Jurassic of the United States)

Also known as Headwaters of Alamos Creek

Where: San Luis Obispo County, California (35.1° N, 120.2° W: paleocoordinates 30.4° N, 65.3° W)

• coordinate estimated from map

When: Franciscan Formation, Tithonian (152.1 - 145.0 Ma)

• Age.-Late Upper Jurassic, Berriasellidan.

Environment/lithology: marine; lithified, massive, brown, calcareous shale

• buff-colored, hard, massive, calcareous shale,

Size class: macrofossils

Collected by N. L. Taliaferro

Primary reference: C. H. Crickmay. 1932. A New Jurassic Ammonite from the Coast Ranges of California. American Midland Naturalist 13(1):1-11 [J. Marcot/J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 225935: authorized by Jonathan Marcot, entered by Jonathan Marcot on 08.06.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Bochianitidae
"Bochianites" sp. Lory 1898 ammonite
 Ammonitida - Lytoceratidae
"Lytoceras" sp. Suess 1865 ammonite
 Ammonitida - Neocomitidae
Berriasella cf. calisto d'Orbigny 1850 ammonite
Substeueroceras sp. Spath 1922 ammonite
Protothurmannia rezanoffiana n. gen. n. sp. Crickmay 1932 ammonite
 Ammonitida - Crioceratitidae
""Crioceras" sp." = Crioceratites
""Crioceras" sp." = Crioceratites Leveillé 1837 ammonite
 Phylloceratida - Phylloceratidae
"Phylloceras" sp. Suess 1865 ammonite
 Belemnitida -
Pachyteuthis sp. Bayle 1878 belemnite
Bivalvia
 Pectinida - Buchiidae
Buchia terebratuloides Lahusen 1888 scallop