ORIGINAL ARTICLE
Winged fruits of Pteleoidea gen. nov. from the Paleocene of Wyoming, USA
1
Florida Museum of Natural History, Dickinson Hall, Gainesville, Florida 32611-7800, USA
Submission date: 2025-06-26
Acceptance date: 2025-09-23
Online publication date: 2025-12-19
Publication date: 2025-12-19
Corresponding author
Steven R. Manchester
Florida Museum of Natural History United States, University of Florida, United States
Florida Museum of Natural History United States, University of Florida, United States
HIGHLIGHTS
- Extinct biwinged fruits are recognized from the Paleocene of Wyoming
- Koelreuteria annosa of R.W. is demonstrated not to be Koelreuteria
- Associated leaflets are also described
KEYWORDS
ABSTRACT
Winged fruits formerly attributed to Koelreuteria from the Paleocene Fort Union Formation of
southwestern Wyoming are reevaluated. Numerous additional specimens have been collected to supplement the
original treatment of K. annosa Brown, which was based on only one specimen. Differences from extant and
fossil species of Koelreuteria lead us to recognize a new genus. Pteleoidea annosa (Brown) gen. et comb. nov. is
characterized by elliptical fruits with a pair of wings lying in a common plane, with an apical style and borne
on a long, narrow pedicel. The fruit possesses a hypogynous nectary disk and perianth. The central fusiform
locular region sometimes preserves elongate elliptical seeds, borne in axile attachment. Although the fruits do
not conform precisely to an extant genus, sapindalean affinity, possibly with the Rutaceae, is suggested. Glanddotted
serrate leaflets found in association with the fruits are also inferred to be of sapindalean affinity. These
remains add to the diversity of extinct eudicots encountered in the Paleocene of North America.
FUNDING
No.
CONFLICT OF INTEREST
The authors
have declared that no competing interests exist.
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| eISSN: | 2082-0259 |
| ISSN: | 0001-6594 |
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