Taxonomy and biostratigraphy of late cretaceous and Paleogene triatriate pollen from South Carolina

Frederiksen, Norman; Christopher, Raymond A.

doi:10.1080/01916122.1978.9989168

Cited by 68 publications

(76 citation statements)

References 11 publications

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“…Frederiksen 1983 2 26,27 93 ----Plicatopollis triorbicularis type of Frederiksen & Christopher 1978 --------------- …”

Section: ----Plicatopollis Magniorbicularismentioning

confidence: 99%

“…For this paper, I also disregarded most monosulcate pollen grains and many of the reticulate tricolpate and tricolporate grains because these are difficult to classify into meaningful OTU's and require more detailed study than is justified by their stratigraphic importance. (Krutzsch 1959 Frederiksen 1979 --------------- (Elsik 1974) Frederiksen & Christopher 1978 -------........ (Elsik 1974) Frederiksen & Christopher 1978 2 21 87 ----Platycaryapollenites spp.…”

Section: Introductionmentioning

confidence: 99%

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Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and earliest Oligocene of the eastern Gulf Coast

Frederiksen¹

1988

Professional Paper

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“…Frederiksen 1983 2 26,27 93 ----Plicatopollis triorbicularis type of Frederiksen & Christopher 1978 --------------- …”

Section: ----Plicatopollis Magniorbicularismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and earliest Oligocene of the eastern Gulf Coast

Frederiksen¹

1988

Professional Paper

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“…Platycaryoid pollen first occurs at or just below the Paleocene-Eocene boundary, then becomes abundant in the later early Eocene. It is an important component ofpalynofloras throughout most of North America, including the Arctic, and Western Europe (Hail and Leopold, 1960;Hopkins, 1967;Rouse, Hopkins and Piel, 1971;Leopold and MacGinitie, 1972;Tschudy, 1973;Nichols, 1973;Elsik, 1974;Elsik and Dilcher, 1974;Kedves and Stanley, 1976;Newman, 1977;Bebout, 1977Bebout, , 1980Frederiksen and Christopher, 1978;Nichols and Ott, 1978;Frederiksen, 1979Frederiksen, , 1980Christopher et al, 1980;Gruas-Cavagnetto, Laurain andMeyer, 1980a, 1980b;Nichols, in press;Hickey et al, 1983). Megafossils of Platycarya are abundant and numerically dominant at localities we have collected.…”

Section: )mentioning

confidence: 99%

“…Platycarya strobilacea 2 Siebold et Zuccarini reFor similar reasons the fossil record has also tain many features that are primitive for the shed little light on intrafamilial relationships, family as a whole. However, P. strobilacea also Platycarya-tike pollen first occurs in the fossil has advanced features, such as pseudocolpate record at or slightly below the Paleocene-Eocene pollen, condensed pistillate inflorescences and boundary (Frederiksen and Christopher, 1978), spirally thickened vessel elements, that are but these early Tertiary grains already bear the characteristic pseudocolpi of Platycarya, and ' Received for publication 28 March 1983; revision ac-differ from pollen of P. Strobilacea chiefly in cepted 23 August 1983. being larger and in having a more variable We thank Peter R. Crane, Steven R. Manchester, Amy shape and arrangement of pseudocolpi. Four R. McCune, Doug J. Nichols, Harold E. Robinson, Bruce published megafossil taxa are attributed to H.TifFney and Jack A. Wolfe for discussion and criticism.…”

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confidence: 99%

The Platycarya Perplex and the Evolution of the Juglandaceae

Wing

Hickey

1984

American J of Botany

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We report on the leaves, fruits, inflorescences, and pollen of two fossil species in the genus Platycarya. The association of these dispersed organs has been established by their repeated co‐occurrence at a large number of localities, and for two of the organs (fruit and pistillate inflorescence, and pollen and staminate inflorescence) by apparent organic attachment of compression fossils. Each of the two species can be distinguished by characteristics of all the known megafossil organs. We also review the fossil record of dispersed platycaryoid fruits and inflorescences, recognizing three additional species of Platycarya and two of Hooleya. Two of the fossil Platycarya species are morphologically very different from the living Platycarya strobilacea Sieb. et Zucc., but they show the diagnostic features of the genus. Hooleya is a generalized member of the Platycaryeae that is probably close to the ancestry of Platycarya. The two Platycarya species known from multiple organs provide a remarkable example of mosaic evolution in which fertile and foliar structures have attained different levels of morphological specialization. The leaves, often considered the most plastic of plant organs, retain several features that are otherwise seen only in the Engelhardieae. These similarities in leaf architecture between the fossil Platycarya species and Engelhardieae are advanced features for the Juglandaceae, and thus indicate a sister‐group relationship between the two lines. In contrast to the leaves, the fruits, inflorescences, and pollen of the fossil Platycarya species are almost as specialized as those of the extant P. strobilacea and bear little resemblance to the same structures in other genera of the family. The morphology, taphonomy, sedimentary setting, and geographic and stratigraphic distribution of three of the fossil platycaryoid species suggest that they were wind‐dispersed, early successional plants that grew in thickets. This habit is retained by Platycarya strobilacea and is typical of many of the amentiferae (e.g. Myricaceae, Betulaceae). The r‐selected life‐history pattern of the Platycarya line may well have contributed to its low diversity through geologic time.

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“…Frederiksen and Christopher (1978) noted that subtle but important differences exist between North American and Southern Hemisphere triporates of this general morphology, but at that time they followed Srivastava's use of Casuarinidites for the North American species. More recently, Frederiksen (1988) Triporopollenites granilabratus differs from Triporopollenites infrequens, one of the other two betulaceoidmyricaceoid species in the Tullock palynoflora, in having small (rather than well developed) annuli around the pores.…”

Section: Plate 9 Figures Imentioning

confidence: 99%

Palynostratigraphy of the Tullock Member (lower Paleocene) of the Fort Union Formation in the Powder River basin, Montana and Wyoming

Nichols¹,

Brown²

1992

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Taxonomy and biostratigraphy of late cretaceous and Paleogene triatriate pollen from South Carolina

Cited by 68 publications

References 11 publications

Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and earliest Oligocene of the eastern Gulf Coast

Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and earliest Oligocene of the eastern Gulf Coast

The Platycarya Perplex and the Evolution of the Juglandaceae

Palynostratigraphy of the Tullock Member (lower Paleocene) of the Fort Union Formation in the Powder River basin, Montana and Wyoming

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