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Eucommia eocenica
''Eucommia eocenica'' is an extinct species of flowering plant in the family Eucommiaceae. ''E. eocenica'' is known from fossil fruits found in the middle Eocene Claiborne Formation deposits of the southeastern United States. ''E. eocenica'' is one of five described fossil species from North America assigned to the modern genus ''Eucommia''. The other species are ''E. constans'', ''E. jeffersonensis'', ''E. montana'', and ''E. rowlandii''.
==History and classification==
''Eucommia eocenica'' is known from a number of specimens recovered from Claiborne Formation fossil sites in Tennessee, Missouri, and Mississippi. Two fossils of the species were first described by Edward W. Berry in 1930 from the Holly Hills sand of Tennessee as ''Carpolithus banisteroides'' and ''Simaroubites eocenica'' respectively. The two fossils were reexamined by Roland W. Brown in 1940, who recognized them to belong to the same species.〔 Brown moved the species to ''Eucommia'' as ''Eucommia eocenica'' and made ''Carpolithus banisteroides'' a synonym. The species was again examined in 1997 by paleobotanists Victor B. Call and David L. Dilcher, both of the University of Florida in Gainesville. In their reexamination they noted that the species ''Leguminosites copaiferanus'' which was also described by Berry in 1930 is likely also a ''E. eocenica'' fruit rather than a separate taxon.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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