1887 Stylosphaera melpomene - Haeckel p. 135-136; pl. 16. fig. 1 | 1912 Sylacontarium bispiculum - Popofsky p. 91; pl. 2, fig. 2. | 1966 Sylacontarium bispiculum - Benson p. 141-145; pl. 3, figs. 8-11 | 1983 Stylacontarium sp. cf. S. bispiculum - Benson p. 508-509 | 1995 Hexacontium melpomene - Van de Paverd p. 127-128; pl. 31, figs. 2, 7, 8 |
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