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Traits source details
Fredericks, G. N. (1924). Paleontological Notes. 2. On Upper Carboniferous spiriferids from the Urals [in Russian]. Izvestiâ Geologičeskogo Komiteta. 38: 295-324.
472788
Fredericks, G. N.
1924
Paleontological Notes. 2. On Upper Carboniferous spiriferids from the Urals [in Russian]
Izvestiâ Geologičeskogo Komiteta
38: 295-324
Publication
Date action by
Brachythyrididae Fredericks, 1924 † (original description)
Brachythyridoidea Fredericks, 1924 † (original description) Cyrtella Fredericks, 1924 † (original description) Cyrtiidae Frederiks, 1924 † (original description) Cyrtiinae Fredericks, 1924 † (original description) Cyrtioidea Fredericks, 1924 † (original description) Cyrtospirifer Nalivkin in Fredericks, 1924 † (original description) Elytha Fredericks, 1924 † (original description) Eoreticularia Nalivkin in Fredericks, 1924 † (original description) Spiriferellina Fredericks, 1924 † (original description) |