The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2022

IDNAME urn:idName:ifpni.org:genus:AC60BDB1-CD3C-D888-99A5-278231DE0E17 genus
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Pentapetalum

Genus Pentapetalum Mart.-Mill., Crepet, Nixon Amer. J. Bot., 96(5): 935. 1 May 2009
Name
Pentapetalum
Rank
Genus
Authors (Pub.)
Martínez-Millán M. Crepet W. L. Nixon K. C.  
Publication
Pentapetalum trifasciculandricus gen. et sp. nov., a thealean fossil flower from the Raritan Formation, New Jersey, USA (Turonian, Late Cretaceous) [2009/5]
Journal
American Journal of Botany
Volume
96
Issue
5
Page number
935
Year
2009
Parent Taxon
[Order] Theales
Fossil Status
flowers
Type
Pentapetalum trifasciculandricum
Diagnosis
Flowers bisexual, pentamerous, actinomorphic, and with a flat, wide, somewhat triangular receptacle. Calyx and corolla well-differentiated, sepals and petals free from one another. Androecium of numerous tetrasporangiate stamens grouped in three clusters that resemble fascicles. Filaments longest at the cluster’s center and decrease in size laterally. Gynoecium tricarpellate with three distinct styles. Ovary trilocular with axile placentation. This genus can be easily distinguished among the fossil flowers of the Raritan Formation primarily by its numerous nonlaminar stamens of unequal sizes. Although very similar to extant Stewartia and Gordonia, it differs in having a tricarpellate gynoecium.
Nomenclatural synonyms

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