Eucommia eocenica
species of plant
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.
Begin with the source’s own compact description: “Eucommia eocenica” is species of plant. The dossier treats that line as a proposition to test through Eucommia, eocenica and species, not as a finished interpretation.
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The phrase “species of plant” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Jan 3, 2024. The linked authority identifier is Q5406188. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1930, 1940 and 1997.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Eucommia eocenica” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.