Steven R. Manchester , Kory A. Disney , Kasey K. Pham
2020 | ročník 76 | číslo 2 | stránky 211–216
DOI:
10.37520/fi.2020.018
Abstract
A new kind of fin-winged fruit is recognized from lacustrine shales of the early Eocene Tepee Trail Formation of northwestern Wyoming and from the middle Eocene Clarno Formation of central Oregon, USA. The fruits are obovate with five thick lateral wings, borne on a thick pedicel and bearing scars of hypogynous perianth and disk. The fruit surface is covered with small circular dots interpreted as glands. This combination of characters leads us to infer affinities with the Rutaceae, although no identical modern genus is known. We establish the new genus and species, Quinquala obovata.
Key words
winged fruits, Tertiary, Wyoming, Oregon, Clarno Formation, Tepee Trail Formation
Lilla Hably , Johanna Eder , Steven R. Manchester
2020 | ročník 76 | číslo 2 | stránky iii–vii
PFNR (Reference LSID):
10.37520/fi.2020.016
Steven R. Manchester , Terry A. Lott
2019 | ročník 75 | číslo 2 | stránky 281–288
DOI:
10.2478/if-2019-0016
Abstract
Shales of the early middle Eocene Parachute Creek Member of the Green River Formation in Utah, western USA, have yielded a large number of fossil plant remains with abundant Platanaceae, Salicaceae, and Ulmaceae, but many of the constituents of this flora remain indeterminate. Here we present a new fruit type based on distinctive sedimentary molds investigated by reflected light and μCT scanning. The structures are oblate woody fruits, about 18–26 mm wide but only 2–4 mm high, but partially flattened by compression within the sediment. In transverse view they are rounded-polygonal, with 5–6 sides. In lateral view the locule is dome-shaped with 7 to 11 obpyriform grooves radiating from the center of the basal wall. Three-dimensional imaging and both physical and digital sections indicate that the fruits were circumscissile capsules. Although analogous fruits occur in the Lecythidaceae A.RICH., Bonanzacarpum sprungerorum sp. nov. fruits are much smaller and lack the prominent woody pedicel and corresponding basal scar that characterizes that family. Hence, the systematic position of B. sprungerorum remains uncertain.
Key words
fossil fruits, circumscissile capsules, Palaeogene, extinct, micro-CT scanning
Steven R. Manchester , Kathleen B. Pigg , Melanie L. Devore
2018 | ročník 74 | číslo 1-2 | stránky 45–54
Steven R. Manchester
2014 | ročník 70 | číslo 3-4 | stránky 153–210