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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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Spinosa & Glenister |
2000 |
Ancestral Araxoceratinae (Upper Permian Ammonoidea) from Mexico and Iran.
In: Wardlaw,B.R., Grant,R.E. & Rohr,D.M.: The Guadalupian Symposium, Smithsonian Contributions to the Earth Sciences, 32, 397-406, 6 fig., Washington.
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