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| Author | : | PALMER 1928 |
| Current genus | : | Planocaprina |
| Type(s) | : | California Academy of Science (San Francisco, California): 2175, 2176 - Albian - Cenomanian lower, Soyatlán de Adentro (Jalisco, Mexico) |
| 1928 | Planocaprina trapezoides Palmer, new species -- PALMER , p. 65, textfigs.7-8 | |
| 1930 | Planocaprina trapezoides Palm. -- BURCKHARDT , p. 208 | |
| 1934 | Planocaprina trapezoides Palmer 1928 -- KUTASSY , p. 165 | |
| 1937 | Planocaprina trapezoides Palmer -- MAC GILLAVRY , p. 139 | |
| 1977 | Planocaprina trapezoides Palmer -- COOGAN , p. 52, pl.10, fig.2 [copy Palmer 1928] |