WoRMS source details
Elias, M. K. (1950). Paleozoic Ptychocladia and Related Foraminifera. Journal of Paleontology. 24(3): 287-306.
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Elias, M. K.
1950
Paleozoic Ptychocladia and Related Foraminifera
Journal of Paleontology
24(3): 287-306
Publication
Banded and alveolated structure of calcareous wall, manner of partition of chamber, and discovered megalospheric generation for the genus Ptychocladia, whose microspheric generation was previously classified with ctenostomatous Bryozoa, indicate its belonging with adnate Foraminifera. New varieties P. agellus var. tenuis and var. rotaliformis, and new species P. bassleri from the Pennsylvanian of Nebraska, Kansas and Oklahoma are described. Chabakovia Vologdin, a supposed alga from the Middle or Lower Cambrian of southern Urals, is considered related to Ptychocladia and the oldest known foraminifer. Another form from the Lower Permian of Russia is provisionally classified as Chabakovia (?) shulgae, n. sp., and another new species Bdelloidina (?) permica from the Lower Permian of Texas is described. All mentioned forms and the extant genus Bdelloidina are united in a new family Ptychocladiidae. The life-cycle of Ptychocladia, and the evolution and ecology of the new family are discussed.
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Bdelloidina aggregata var. bradii Elias, 1950 accepted as Bdelloidina aggregata var. bradyi Elias, 1950 accepted as Bdelloidina aggregata Carter, 1877 (original description)
Bdelloidina aggregata var. bradyi Elias, 1950 accepted as Bdelloidina aggregata Carter, 1877 (original description)
Bdelloidina permica Elias, 1950 † (original description)
Chabakovia ramosa Vologdin Em. Elias, 1950 † accepted as Chabakovia ramosa A.G.Vologdin † (original description)
Chabakovia shulgae Elias, 1950 † accepted as Chabakovia shulgae Elias † (original description)
Ptychocladia agellus var. rotaliformis Elias, 1950 † (original description)
Ptychocladia agellus var. tenuis Elias, 1950 † (original description)
Ptychocladia bassleri Elias, 1950 † (original description)
Ptychocladiidae Elias, 1950 † (original description)
Ptychocladioidea Elias, 1950 † (original description)
Bdelloidina aggregata var. bradyi Elias, 1950 accepted as Bdelloidina aggregata Carter, 1877 (original description)
Bdelloidina permica Elias, 1950 † (original description)
Chabakovia ramosa Vologdin Em. Elias, 1950 † accepted as Chabakovia ramosa A.G.Vologdin † (original description)
Chabakovia shulgae Elias, 1950 † accepted as Chabakovia shulgae Elias † (original description)
Ptychocladia agellus var. rotaliformis Elias, 1950 † (original description)
Ptychocladia agellus var. tenuis Elias, 1950 † (original description)
Ptychocladia bassleri Elias, 1950 † (original description)
Ptychocladiidae Elias, 1950 † (original description)
Ptychocladioidea Elias, 1950 † (original description)
