Authors Year Title
Böhmers 1936 Bau und Struktur von Schale und Sipho bei permischen Ammonoidea.
1-125, fig.1-67, pl.1-2; Apeldoorn.
Glenister & Furnish 1961 The Permian ammonoids of Australia.
Journal of Paleontology, 35 (4): 673-736, fig.1-17, pl.78-86; Tulsa,Oklahoma.
Haniel 1915 Die Cephalopoden der Dyas von Timor.
In: Wanner,J.: Paläontologie von Timor, 3,6: 1-123, fig.1-38, pl.1-11; Stuttgart.
Smith 1927 Permian ammonoids of Timor.
Jaarboek van het Mijnwezen in Nederlandsch-Indie, 55 (for 1926): 1-58, pl.1-16; 'S Gravenhage.
Smith 1929 The transitional Permian ammonoid fauna of Texas.
American Journal of Science, 97: 63-80, fig.A-C; New Haven.
Zhou 1989 Age of the Longyin Formation in Southwest Guizhou province.
Science in China (ser.B) 32: 1361-1370, 1 fig., 2 tabl., 1 pl.