| 1913 Stichopilium annulatum - Popofsky p. 403-404; pl. 37, figs. 2-3 | | 1966 Lithostrobus hexastichus - Benson (partim.) p. 506-508; pl. 34, figs. 13-14, (not 15-16) | | 1971 Eucyrtidium sp. - Petrushevskaya fig. 99, I-II | | 1983 Eucyrtidium(?) hexastichum group - Benson p. 503; pl. 9, fig. 10, (not 9, 11) |
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