Dillhoffia
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Dillhoffia Temporal range: 49.5 Ma |
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| Fossil Dillhoffia cachensis calyces | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| Class: | incertae sedis |
| Family: | incertae sedis |
| Genus: | †Dillhoffia |
| Species: | D. cachensis |
| Binomial name | |
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Dillhoffia cachensis Manchester & Pigg, 2008 |
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Dillhoffia is an extinct monotypic genus of flowering plant with a single species, Dillhoffia cachensis known from Ypresian age Eocene fossils found in British Columbia, Canada, and Washington, USA. The genus and species were described from fifteen specimens found in an unnamed formation belonging to the Kamloops group shales; and two specimens from the Klondike Mountain Formation. The unnamed formation outcrops at the McAbee Fossil Beds near Cache Creek, BC, which is designated the type locality while the two U.S. specimens were recovered from the Tom Thumb Tuff member of the Klondike Mountain Formation in Republic, Washington. It is of interest to note that of the Okanagan highlands fossil sites Dillhoffia is only known from two locations, and is absent or has not been identified from the others.
The holotype specimen, number TMP 83.39.175, is preserved in the Royal Tyrell Museum and the paratype specimens are in the Thompson Rivers University and University of Saskatchewan collections. The specimens were studied by paleobotanists Steven Manchester of the University of Florida and Kathleen Pigg of Arizona State University. Manchester and Pigg published the 2008 type description for D. cachensis in the journal Botany, Volume 86, number 9. They chose the generic name Dillhoffia to honor the brothers Richard M. Dillhoff and Thomas A. Dillhoff for their substantial contributions and promotion of Pacific Northwest North American Paleogene floras. The specific name is a reference to Cache Creek, British Columbia, the nearest town to the McAbee site.
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