| 1887 Amphitholus acanthometra - Haeckel p. 667; pl. 10, figs. 5-6 | | 1887 Amphitholonium tricolonium - Haeckel p. 669; pl. 10, fig. 7 | | 1966 Amphitholus acanthometra - Benson p.258-260; pl. 17, figs. 4-7 | | 1974 Pyloniid sp. - Renz p. 795; pl. 13, fig. 12 | | 1983 Amphitholus acanthometra - Benson p. 500 |
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