Cretaceous angiosperm flowers: Innovation and evolution in plant reproduction

Friis, Else Marie; Pedersen, Kaj Raunsgaard; Crane, Peter R.

doi:10.1016/j.palaeo.2005.07.006

Cited by 352 publications

(288 citation statements)

References 142 publications

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“…As discussed in Doyle & Endress (2014), most of the Portuguese mesofossil localities of Friis et al (1994Friis et al ( , 2006Friis et al ( , 2011 may be close to the Glen Rose samples in age, i.e. late early Albian, rather than either late Aptian or early Albian (as assumed by Friis et al 2006Friis et al , 2011: ca.…”

Section: Summary Of Stratigraphic Resultsmentioning

confidence: 89%

“…late early Albian, rather than either late Aptian or early Albian (as assumed by Friis et al 2006Friis et al , 2011: ca. 15% of the angiosperm taxa are tricolpate, some of them striate (Pedersen et al 2007).…”

Section: Summary Of Stratigraphic Resultsmentioning

confidence: 99%

“…15% of the angiosperm taxa are tricolpate, some of them striate (Pedersen et al 2007). The rich Torres Vedras locality (Friis et al 2010) is perceptibly older, but rather than being Barremian-early Aptian (Friis et al 2006(Friis et al , 2010(Friis et al , 2011, it may be near upper Zone I in age, since it contains Pennipollis, indicative of a post-Barremian age (reviewed in Doyle & Endress 2014), plus C. rotundus-like monosulcates (Friis et al 2010, pl. IV) and reticulate tricolpates similar to those in upper Zone I, the lowest Albian of England and the lowest Albian in the Portuguese coastal sections (Heimhofer et al 2007).…”

Section: Summary Of Stratigraphic Resultsmentioning

confidence: 99%

“…The mesofossil floras of Friis et al (1994Friis et al ( , 2006Friis et al ( , 2010Friis et al ( , 2011, which together with floras from Potomac Zone II contain the most intensively studied flowers of early angiosperms, are from continental deposits farther inland. Hochuli et al (2006) argued that their data indicate a significant hiatus between Potomac Zones I and II, as proposed by Brenner (1963), but with Zone I extending up into the earliest Albian and Zone II beginning in the middle Albian.…”

Section: Background On the Potomac And Portuguese Sequencesmentioning

confidence: 99%

“…Both regions belonged to the same Southern Laurasian province, which is an important consideration in view of significant geographic differences among floras and diachronous appearances of angiosperm taxa at this time (Brenner 1976(Brenner , 1996 coastal sections in Portugal (Heimhofer et al 2005(Heimhofer et al , 2007(Heimhofer et al , 2012Horikx et al 2016). Studies of the Portuguese sections have challenged previous correlations of both the Potomac sequence and mesofossil floras described from continental beds in Portugal (Friis et al , 2006(Friis et al , 2010(Friis et al , 2011, notably in the part of the Albian represented in the Glen Rose Formation (Hochuli et al 2006). Palynological investigations of the Glen Rose could therefore provide independent tests of competing stratigraphic interpretations.…”

Section: Introductionmentioning

confidence: 99%

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Early Cretaceous (Albian) spores and pollen from the Glen Rose Formation of Texas and their significance for correlation of the Potomac Group

Tanrikulu¹,

Doyle

Delusina

2017

Palynology

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Because the Gulf Coast Lower Cretaceous is dated by ammonites, it has great potential as a reference section for correlating continental sequences such as the Potomac Group and dating events in the rise of angiosperms. Middle Albian terrestrial palynofloras from Oklahoma have been described in detail, but the early Albian interval, represented in the Glen Rose Formation of Texas, is less well known. Samples from two localities on the Paluxy River, which correlate with horizons containing late early Albian ammonites, are dominated by Classopollis and Exesipollenites, but angiosperm pollen is the next most common terrestrial element, and there are several index spore species for Zone II in the Potomac Group. Among the angiosperms, reticulate monosulcates are most common and diverse, but there are also several tricolpate species. Stratigraphically important angiosperms include the Clavatipollenites rotundus group and reticulate tricolpates, which appear in the upper part of Potomac Zone I and the dated earliest Albian of England and Portugal. However, there are also tricolpates with striate-reticulate sculpture, a pollen type that is not known from upper Zone I but appears in the late early Albian of Portugal. This assemblage contrasts with floras from Potomac Zone II and the middle Albian (lower Fredericksburg Group) of Oklahoma, where tricolpates overtook monosulcate angiosperms in species diversity. These results confirm arguments based on the Portuguese section that there is a significant hiatus between Potomac Zones I and II, and that this gap is at least partly late early Albian. The dominance of Classopollis and Exesipollenites and the occurrence of isolated Northern Gondwanan elements (Sergipea, Tucanopollis) suggest that Texas lay in a transition zone between Southern Laurasia and the hotter and drier Northern Gondwana province, but regional studies are needed to disentangle geographic and climatic factors from effects of the lagoonal local environment.

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