The Pollen Genus Classopollis Pflug, 1953

Pocock, S. J.; Jansonius, Jan

doi:10.2307/1484380

Cited by 87 publications

(42 citation statements)

References 2 publications

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“…As this study is reliant on light microscopy Classopollis grains that have a granulate sculpture, continuous equatorial striae made of granulae and a consistently thicker exine (N 1 μm) are placed in C. classoides. The equatorial diameter of the grains is, however, much larger than described by Pocock and Jansonius (1961).…”

Section: Synonymymentioning

confidence: 64%

“…However, as discussed by Peyrot et al (2007), the loss of the type material precludes any comparison. C. classoides was described by Pocock and Jansonius (1961) as having a granulate sculpture whereas C. torosus was described by Couper (1958) and Burger (1965) as having a scabrate exine, as was C. sp. cf.…”

Section: Synonymymentioning

confidence: 99%

“…Pocock and Jansonius (1961) described continuous bands of sculpture around the equator of C. classoides whilst Couper (1958) and Burger (1965) suggested that C. torosus has forms that have continuous endostriae or features that are not continuous but are formed by discrete granules. Peyrot et al (2007) attempted to distinguish the two species based on SEM, TEM and CSLM and determined that their Type B grains were related to C. torosus, based on a thinner scabrate exine than their Type A, which had features that resembled the description of C. classoides by Pocock and Jansonius (1961). This is in agreement with the measurements by Reyre (1970) who indicated that C. classoides has a thicker exine (1-2 μm) than C. torosus (0.75-1.0 μm).…”

Section: Synonymymentioning

confidence: 99%

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Cheirolepidiacean foliage and pollen from Cretaceous high-latitudes of southeastern Australia

et al. 2015

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Section: Synonymymentioning

confidence: 64%

Section: Synonymymentioning

confidence: 99%

Section: Synonymymentioning

confidence: 99%

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Cheirolepidiacean foliage and pollen from Cretaceous high-latitudes of southeastern Australia

et al. 2015

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“…For example, the range base of Nannoceratopsis is Upper The dominance of the pollen genus Classopollis is clearly significant. Its palaeoecology has been much discussed and it is conventionally interpreted as being thermophilic and a reliable proxy for warm/hot climatic conditions 19,20,69,70 . The parent plants were representatives of the thermophilic and xerophytic family .…”

Section: [223] Palynostratigraphymentioning

confidence: 99%

Carbon sequestration in an expanded lake system during the Toarcian oceanic anoxic event

et al. 2017

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(2017) 'Carbon sequestration in an expanded lake system during the Toarcian oceanic anoxic event.', Nature geoscience., 16 (2). pp. 129-134. Further information on publisher's website:https://doi.org/10.1038/ngeo2871Publisher's copyright statement:Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. The early Toarcian Oceanic Anoxic Event (T-OAE at ~183 Ma) is recognized as one 32 of the most intense and geographically extensive events of oceanic redox change and 33 accompanying organic-carbon burial in the Mesozoic Era 1,2 . The T-OAE is marked by 34 major changes in global geochemical cycles, with an apparently rapid negative shift 35 of as much as ~7‰ in bulk marine and terrestrial organic-carbon isotope records and 36 a typically smaller (3-6‰) negative excursion in carbonate archives and specific 37 organic compounds 3-10 . The observed early Toarcian perturbation to the exogenic 38 carbon cycle has been linked to volcanism of the Karoo-Ferrar large igneous province 39 (LIP) and associated release of volcanogenic CO 2 , thermogenic methane (CH 4 ) from 40 sill intrusion into Gondwanan coals, and biogenic methane from dissociation of sub-41 seafloor clathrates 3,6,[11][12][13] . Early Toarcian elevated atmospheric pCO 2 likely induced 42 climatic and environmental change 5,12,[14][15][16] by accelerating the global hydrological 43 cycle and increasing silicate weathering, thereby increasing delivery of riverine 44 nutrients to the oceans and potentially also to large inland lakes 17 . In the marine 45 realm, the consequential increase in primary productivity and carbon flux to the sea 46 floor is credited with enhancing the burial of planktonic material in relatively deep 47 continental-margin sites, whereas in shallower water semi-restricted marine basins, 48 chemical and physical water-column stratification likely aided the burial of organic 49 matter 17 . Particularly in northern Europe, the evidence points to regional to global 50 development of anoxic/euxinic (sulphide-rich) bottom waters that strongly affected 51 palaeoceanographic conditions and marine ecosystems 15,17,18 . Globally significant 52 burial of 13 C-depleted photosynthetically derived organic matter commonly produced 53 an overarching positive carbon-isotope excursion (CIE) interrupted by the 54 3 characteristic abrupt negative shift that invariably characterizes the T-OAE (early 55Toarcian tenuicostatum−falciferum ammonite biozones) 1,2,18 . 56

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“…This zone is characterized by abundant spores, particularly Schizaeoisporites (26.3%) ( (Figure 6-24) pollen grains are known to be derived from representatives of the extinct family Cheirolepidiaceae, which has been reported from the middle Upper Triassic (Norian) -lower Upper Cretaceous (Turonian) and some younger Cretaceous deposits worldwide (Couper, 1958;Pocock and Jansonius, 1961;Pocock, 1962;Norris, 1969;Cornet and Traverse, 1975), including the Circum-Pacific Northern Hemisphere (Agasie, 1969;Takahashi, 1974;Brideaux and McIntyre, 1975;Srivastava, 1976;Song et al, 1981;Song et al, 1986;Choi and Park, 1987;Choi, 1989;Yi et al, 1993).…”

Section: 12mentioning

confidence: 99%

Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core, Songliao Basin, NE China

Zhao

Wan

et al. 2014

Sci. China Earth Sci.

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Cretaceous climate was warmer than today. The Songliao Basin contains one of the most important Late Cretaceous non-marine deposits in China for the research of the paleoenvironment and paleoclimate. This research is based on core samples from the SK1(S) borehole. The strata sampled are the upper part of the Quantou Formation to member 2 of the Nenjiang Formation, where spores, pollen, dinoflagellates, and other microfossils are abundantly preserved. Based on analysis of the spores and pollen fossils from the core samples, the following six fossil assemblage zones have been recognized in ascending order: The . The six fossil zones range from the late Cenomanian to early Campanian. The Late Cretaceous dinoflagellate cysts in the Songliao Basin are of high abundance and low diversity. Specific phytoplankton types reflect salinity changes of the Songliao Lake. Paleoecology of the dinoflagellates suggests that sediments of members 2 and 3 of the Yaojia Formation (K 2 y 2+3 ) were deposited in a freshwater environment, whereas members 2 and 3 of the Qingshankou Formation (K 2 q 2+3 ) and members 1 and 2 of the Nenjiang Formation (K 2 n 1+2 ) were deposited in freshwater to brackish water environments. Combined with the paleoecology of dinoflagellates and the palynomorph biozones, valuable information of the paleoclimate was provided. The quantitative analyses of spores and pollen fossils, such as vegetation type, climate type, and humidity type, diversity and dominance, indicate a relatively sub-humid, mid-subtropical paleoclimate, with slight climatic fluctuation and/or temporal change.Late Cretaceous, Songliao Basin, spores and pollen, dinoflagellate, paleoclimate Citation:Zhao J, Wan X Q, Xi D P, et al. 2014. Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core,

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The Pollen Genus Classopollis Pflug, 1953

Cited by 87 publications

References 2 publications

Cheirolepidiacean foliage and pollen from Cretaceous high-latitudes of southeastern Australia

Cheirolepidiacean foliage and pollen from Cretaceous high-latitudes of southeastern Australia

Carbon sequestration in an expanded lake system during the Toarcian oceanic anoxic event

Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core, Songliao Basin, NE China

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