| 1889 Sphaeropyle langii - Dreyer p. 13, pl. 4, fig. 54 | | 1965 Prunopyle tetrapila - Hays p. 172, pl. 2, fig. 5 | | 1973 Sphaeropyle robusta - Kling pl. 1, fig.11 | | 1973 Sphaeropyle langii - Kling p. 634, pl. 1, figs. 5-10; pl. 13, figs. 6-8 | | 1975 Sphaeropyle langii - Foreman p. 618, pl. 9, figs. 30, 31 | | 1985 Sphaeropyle langii - Morley pl. 5, figs. 3A, 3B |
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