Bonanzacarpum sprungerorum Manchester et T.A.Lott

Plant Fossil Names Registry Number: PFN000564


Authors: S. R. Manchester & T. A. Lott

Rank: species

Genus: Bonanzacarpum Manchester et T.A.Lott

Reference: Manchester, S. R. & Lott, T. A. (2019): Bonanzacarpum sprungerorum, a bizarre fruit type from the Eocene Green River Formation of Utah, USA. – Fossil Imprint 75(2): 281–288.

Page of description: 283

Illustrations or figures: Text-figs 1–3

Name is type taxon for

Bonanzacarpum Manchester et T.A.Lott 2019


Holotype UF18054-55045, Florida Museum of Natural History, Gainesville, Florida, USA
Figures: Text-figs 1a,b

Original protologue

Fruit a tabular, button-shaped circumscissile capsule, rounded-polygonal in transverse section with 4 to 6 equal to unequal sides. Capsule unilocular, circumscissile with an apical operculum closely fitting like a stopper. Lateral walls smooth, straight. Basal surface of locule with 7–11 smooth, obpyriform, slightly raised areas radiating from a central point. Obpyriform areas pointed proximally, with somewhat convex lateral margins and round distal margins. Obpyriform areas with corresponding cycle of smaller indentations on the basal external surface.


The species name honors Mike and Sandra Sprunger who collected and donated some of the finest examples.


Paleogene, Eocene
Parachute Creek Member, early to middle Eocene, ca 47 my


United States
Vicinity of Bonanza, Utah (UF locality 18054: 39°53'40.76"N, 109°8'42.31"W).

Plant fossil remain

macro- and meso-fossils-embryophytes except wood