1887 Phorthicium pylonium - Haeckel p.709; pl. 49, fig. 10 |
1899 Phorthicium pylonium - Cleve p. 31; pl. 3, fig. 2 |
1900 Tetrapylonium clevei - Jørgensen p. 64 |
1905 Phorthicium pylonium - Jørgensen pp. 120-121; pl. 10, fig. 42; pl. 11, figs. 42-45 |
1909 Phorthicium pylonium - Schröder pp. 55-56; figs. 33a-c |
1958 Phorthicium pylonium - Riedel p. 229; pl. 2, fig. 5 |
1967 Phorticium clevei - Petrushevskaya pp. 56-60; figs. 32(1-2), 33-34 |
1974 Phorticium clevei - Petrushevskaya and Bjørklund fig. 7 |
1976 Phorticium clevei - Bjørklund pl. 4, figs. 6-10 |
1991 Phorticium clevei - Molina-Cruz fig. 2.5 |
1995 Phorticium clevei - Schröder-Ritzrau pl. 2, figs. 1-2, 5 |
1996 Phorticium pylonium - Welling pl. 12, figs. 10-11 |
1998 Phorticium clevei - Bjørklund et al. pl. 1, fig. 15 |
1998 Phorticium clevei - Boltovskoy fig. 15.82 |
1998 Phorticium clevei - Dolven pl. 7, figs. 1-6 |
2003 Phorticium pylonium - Bjørklund and Kruglikova pl. 3, figs. 10-12, 14-15 |
2003 Phorticium pylonium - Cortese et al. pl. 2, figs. 12-13; pl. 3, fig. 5; pl. 4, figs. 18-19 |