| Euchelicerata sensu Weygoldt & Paulus, 1979 |
| Xiphosurida sensu Latreille, 1802 |
| Belinurina sensu Zittel & Eastman, 1913 |
| Belinuridae sensu Zittel & Eastman, 1913 |
| ProlimulusFritsch, 1899 |
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