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Authors |
Year |
Title |
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Diener |
1927 |
Leitfossilien des marinen Perm.
G.Gürich: Leitfossilien, 5: 1-84, fig.1-10, pl.1-14; Berlin (Borntraeger).
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Frech |
1897- |
Lethaea geognostica oder Beschreibung und Abbildung der für die Gebirgs-Formationen bezeichnendsten Versteinerungen. I. Theil. Lethaea palaeozoica. 2. Band.
35pls, 6maps, 551figs.; Stuttgart.
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Furnish & Glenister |
1970 |
Permian Ammonoid Cyclolobus from the Salt Range, West Pakistan in Kummel,B. & Teichert,C. (eds): Stratigraphic boundary problems: Permian and Triassic of West Pakistan.
University of Kansas Department of Geology Special Publication 4: 153-175, fig.1,2, tab.1,2, pl.1-4.
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Spinosa, Furnish & Glenister |
1975 |
The Xenodiscidae, Permian ceratitoid ammonoids.
Journal of Paleontology, 49 (2): 239-283, fig.1-22, tab.1-5, pl.1-8.
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Waterhouse |
1972 |
The evolution, correlation, and paleogeographic significance of the Permian ammonoid family Cyclolobidae.
Lethaia, 5 (3): 251-270, fig.1-6; Oslo.
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