The Mesozoic amber of Schliersee (southern Germany) is Cretaceous in age

Schmidt, Alexander R.; Eynatten, Hilmar von; Wagreich, Michael

doi:10.1006/cres.2001.0267

Cited by 39 publications

(7 citation statements)

References 9 publications

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“…Palaeodikaryomyces baueri is believed to have preserved the essential characters of the primary Dikaryomycetidae, not differentiated into Asco- and Basidiomycetes. Schmidt et al (2001) hypothesize that P. baueri was an archaic fungus that persisted into the late Mesozoic.…”

Section: Fossils Interpreted As or Compared To Zygomycetous Fungimentioning

confidence: 99%

Fossil evidence of the zygomycetous fungi

Krings¹,

Taylor²,

Dotzler³

2013

Pers - Int Mycol J

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Molecular clock data indicate that the first zygomycetous fungi occurred on Earth during the Precambrian, however, fossil evidence of these organisms has been slow to accumulate. In this paper, the fossil record of the zygomycetous fungi is compiled, with a focus on structurally preserved Carboniferous and Triassic fossils interpreted as zygosporangium-gametangia complexes and resembling those of modern Endogonales. Enigmatic microfossils from the Precambrian to Cenozoic that have variously been interpreted as, or compared to, zygomycetous fungi are also discussed. Among these, the spherical structures collectively termed ‘sporocarps’ are especially interesting because of their complex investments and abundance in certain Carboniferous and Triassic rocks. Circumstantial evidence suggests that at least some ‘sporocarp’ types represent mantled zygosporangia. Zygomycetous fungi probably were an important element in terrestrial paleoecosystems at least by the Carboniferous.

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Section: Fossils Interpreted As or Compared To Zygomycetous Fungimentioning

confidence: 99%

Fossil evidence of the zygomycetous fungi

Krings¹,

Taylor²,

Dotzler³

2013

Pers - Int Mycol J

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“…Testate amoebae have a long fossil history, with fossils dated from the Cretaceous (Boeuf and Gilbert 1997;Foissner and Schiller 2001;Patterson and Kumar 2002;Schmidt et al 2001;Schönborn et al 1999), the Carboniferous (Loeblich and Tappan 1964), and perhaps even Late Neoproterozoic (Porter and Knoll 2000). Despite this long fossil history, most paleontological studies of testate amoebae focus on the Quaternary and especially on the Holocene where they are used as paleobioindicators in lakes and peatlands (Charman 2001;Medioli et al 1990;Tolonen 1986).…”

Section: Introductionmentioning

confidence: 99%

Testate amoebae analysis in ecological and paleoecological studies of wetlands: past, present and future

2007

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Testate amoebae are an abundant and diverse polyphyletic group of shelled protozoa living in aquatic to moist habitats ranging from estuaries to lakes, rivers, wetlands, soils, litter, and moss habitats. Owing to the preservation of shells in sediments, testate amoebae are useful proxy indicators complementary to long-established indicators such as pollen and spores or macrofossils. Their primary use to date has been for inferring past moisture conditions and climate in ombrotrophic peatlands and, to a lesser extent, to infer pH in peatlands and the trophic or nutrient status of lakes. Recent research on these organisms suggests other possible uses in paleoecology and ecology such as sea-level reconstruction in estuarine environments, as indicators of soil or air pollution, and monitoring recovery of peatland. We review the past and present use of testate amoebae, the challenges in current research, and provide some ideas on future research directions.

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“…) and found to contain dehydroabietic acid by Vavra (), was later recognized as being Cretaceous in age (Schmidt et al . , ); its source plant is still not known.…”

Section: Geological Settingmentioning

confidence: 99%

Amber from the Alpine Triassic of Lunz (Carnian, Austria): a classic palaeobotanical site

et al. 2017

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Amber from the Triassic (Carnian) of Lunz, a locality which has produced a rich and famous fossil flora, was analysed using UV-B-fluorescence, attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and pyrolysis gas chromatography mass spectroscopy (Py-GC-MS). The amber is classified as a class Ib resinite based on its chemical composition, which is characterized by bicyclic products derived from a regular labdatriene structure and the absence of succinic acid. The presence of diterpenoids and absence of triterpenoids is clear evidence of a gymnosperm origin for the Lunz amber, and the prevalence of sesquiterpenoids and diterpenoids point to a conifer family as a possible botanical source. In search of amber attached to identifiable floral remains we have screened new and historical collections of the macroflora from a number of localities of the Lunz area using UV-B, and describe a striking yellow UV-B-fluorescence of cuticles of pteridosperms, ginkgophytes and conifers. This varies with the diagenetic state of the sediment and may be lost altogether. Detectable amounts of fluorescent compounds were observed in gymnosperm taxa, but not in any ferns and only very weakly in horsetails. This underlines that fluorescent compounds are derived from gymnosperm plants, mostly likely arising secondarily from cyclic hydrocarbons by desaturation during diagenesis as a parallel process in amber as well as in cuticles.

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The Mesozoic amber of Schliersee (southern Germany) is Cretaceous in age

Cited by 39 publications

References 9 publications

Fossil evidence of the zygomycetous fungi

Fossil evidence of the zygomycetous fungi

Testate amoebae analysis in ecological and paleoecological studies of wetlands: past, present and future

Amber from the Alpine Triassic of Lunz (Carnian, Austria): a classic palaeobotanical site

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