Authors Year Title
Bogoslovskaya, Leonova & Shkolin 1995 The Carboniferous-Permian boundary and ammonoids from the Aidaralesh section, southern Urals.
Journal of Paleontology 69: 288-301, 12 figs., Lawrence, KS.
Davis 1972 Mature modifications and dimorphism in selected Late Paleozoic ammonoids.
Bulletins of American Paleontology, 62 (272): 27-130, pls.3-21, Ithaca, NY.
Pavlov 1967 Permskie ammonoidei yugo-vostochnogo Pamira.
Zapiski Leningradskogo ordena Lenina i Trudy Kras. Znam. gorn. Inst. im. G.V.Plekhanova, 53 (2): 69-78, fig.1-7, pl.1-7; Leningrad.
Zhou 1987 First discovery of Asselian ammonoid fauna in China.
Acta Paleontologica Sinica, 26 (2): 130-148, fig.1-11, pl.1-6; Beijing.
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.