Winged fruits of <i>Linnaeeae</i> (Caprifoliaceae) in the Tertiary of Western North America: Diplodipelta gen. nov.

TitleWinged fruits of Linnaeeae (Caprifoliaceae) in the Tertiary of Western North America: Diplodipelta gen. nov.
Publication TypeJournal Article
Year of Publication1995
AuthorsManchester SR, Donoghue MJ
JournalInternational Journal of Plant Sciences
Pagination709 - 722

Recent phylogenetic analyses of the Caprifoliaceae and related families have paved the way for critical study and interpretation of the fossil record. A new extinct genus, Diplodipelta, is established on the basis of winged fruits from the Eocene, Oligocene, and Miocene of western North America, with two species: Diplodipelta reniptera (Becker) comb. nov. and D. miocenica (Berry) comb. nov. Although formerly attributed to Ptela and Dodanaea, detailed comparative studies demonstrate that the fossils actually represent the Caprifoliaceae, tribe Linnaeeae, on the basis of elongate, indehiscent, longitudinally ribbed fruits with a sterile apical neck and persistent, epigynous calyces, and ’’supernumerary bracts.’’ The samaroid dispersal units resemble those of extant Dipelta because the bracts are enlarged into wings that function in wind dispersal. However, Diplodipelta differs from Dipelta by the presence of a pair of fruits, rather than just one fruit, per dispersal unit, by the adnati