Trophic regimes of benthic foraminiferal assemblages in Lower Jurassic shallow water carbonates from northeastern Italy (Calcari Grigi, Trento Platform, Venetian Prealps)

Fugagnoli, Anna

doi:10.1016/j.palaeo.2003.12.004

Cited by 66 publications

(59 citation statements)

References 19 publications

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“…A similar scheme was applied to the Buffadero Member of the Gibraltar Limestone ). More recently, Fugagnoli (2004) recorded that the Hettangian-early Sinemurian interval belongs to his Dasyclades Zone, early most late Sinemurian to?Lituosepta recoarensis zone, while the lower part of the Sinemurian and early Pliensbachian belongs to the Orbitopsella zone and finally the late Pliensbachian belongs to the Planisepta compressa zone. On the other hand, the Toarcian is dominated by forms with internal radial partitions (e.g.…”

Section: General Biostratigraphymentioning

confidence: 99%

“…These small foraminifera were widespread on the platform and have been considered as very tolerant (Septfontaine, 1984;Fugagnoli, 2004). They occur in marginal environments (oligohaline, with terrestrial influx) and in deeper marine environments that reflect elevated levels of organic carbon influx (Rettori, 1995), and with high rates of micritic production (Fugagnoli, 2004). The presence of these small foraminifera, with the complete absence of larger forms, points to a stressed environment or an ecosystem that suffered severe environmental fluctuations.…”

Section: Palaeoecology Of the Jurassic Larger Foraminiferamentioning

confidence: 99%

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Evolution and Geological Significance of Larger Benthic Foraminifera

2018

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Section: General Biostratigraphymentioning

confidence: 99%

Section: Palaeoecology Of the Jurassic Larger Foraminiferamentioning

confidence: 99%

Evolution and Geological Significance of Larger Benthic Foraminifera

2018

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“…Recently, Neri et al (2016) described the first amber from this formation. The Rotzo Formation has been dated, based on foraminifera, ammonites, green algae and isotopic analyses ( 13 C and 87 Sr/ 86 Sr), to the Pliensbachian (Avanzini et al 2006;Fugagnoli 2004;Posenato and Masetti 2012;Franceschi et al 2014). …”

Section: Geological and Palaeogeographic Settingmentioning

confidence: 99%

Megaspores from the Lower Jurassic (Pliensbachian) Rotzo Formation (Monti Lessini, northern Italy) and their palaeoenvironmental implications

Neri

Kustatscher

Roghi

2018

Palaeobio Palaeoenv

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The Rotzo Formation is famous for its Lower Jurassic terrestrial flora and marine (invertebrate) and terrestrial (dinosaur footprint) fauna. However, lycophyte macrofossils were never described from this time period in Italy, although palynological analyses yielded abundant lycophyte spores. Dispersed megaspores, in association with charcoal and amber drops, were recently collected from several horizons and outcrops of the Monte Lessini area. Sedimentological and palaeontological data reconstruct the palaeoenvironment as a paralic swamp under a warm and humid (monsoonal) climate. This is the first record of Jurassic megaspores from Italy, increasing our understanding of Jurassic lycophyte diversity, since at least five microspore and five megaspore genera with selaginellalean botanical affinities can be distinguished. Moreover, this underlines how well these brackish environments were adapted for the preservation of fossil plant remains (including amber).

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“…The assemblage consists of species, that may be considered opportunists (see FuGaGnoli, 2004;BoudaGHer-Fadel, 2008), e.g. M. asiagoensis, Siphovalvulina spp., and Triassic survivors, e.g.…”

Section: Diversification In Foraminiferamentioning

confidence: 99%

Early Jurassic foraminiferal assemblages in platform carbonates of Mt. Krim, central Slovenia

Gale¹,

Kelemen²

2017

Geologija

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During the Early Jurassic, the subtropical carbonate platforms of the peri-Tethys Ocean experienced significant changes in their architectures, as well as in their biota compositions. Shallow-water carbonates from the northern part of the ancient Adriatic Carbonate Platform (External Dinarides) were investigated in six sections, which taken together cover the development of the platform from deposition of the uppermost Triassic Main Dolomite to the middle Lower Jurassic, lithiotid limestone. Our aim was to establish a detailed foraminiferal biostratigraphy and to observe the changes in size, abundance and diversity of foraminifera in different types of facies. As a result, the succession was successfully divided into stage or substage levels. Foraminiferal assemblages were shown to experience a gradual change in taxonomic composition (including an increase in the proportion of complex agglutinated forms), a general increase in abundance of specimens, and greater diversity in each facies type, except in bindstone and mudstone. Notable is the difference between Hettangian assemblages, which display fairly uniform compositions in all facies types and the predominance of opportunists, and the post-Hettangian assemblages, which become progressively more species-rich and where the differences in facies are perhaps more pronounced. Changes in the size of the species Meandrovoluta asiagoensis Fugagnoli & Rettori, and of the largest specimen in the assemblages, however, are less clear, but are arguably present. Faunal changes roughly correspond to the gradual change from the flat-top platform of the upper Triassic -Hettangian, where biota would be repeatedly subjected to stressed peritidal conditions, to a platform differentiated into lagoon, sand bars and ephemeral emergent areas, offering numerous habitats and perhaps more stable living conditions for organisms. IzvlečekKarbonatne platforme območja Tetide so v času starejše jure doživljale znatne spremembe v morfologiji in sestavi biote. Plitvomorske karbonate Jadranske karbonatne platforme (Zunanji Dinaridi) smo raziskali v šestih profilih na širšem območju Krima. Profili skupaj zajemajo interval od vrhnjega dela, glavnega dolomita do litiotidnega apnenca. Naš cilj je bil identifikacija foraminifernih biocon. Poleg same taksonomske sestave smo beležili še raznolikost foraminifernih združb, pogostnost (ali gostoto) foraminifer ter spremembo v velikosti vrste Meandrovoluta asiagoensis Fugagnoli & Rettori ter v velikosti največjih primerkov v združbah. Po pričakovanjih rezultati kažejo postopne spremembe v taksonomski sestavi foraminifernih združb, vključno z naraščanjem deleža kompleksnih aglutiniranih vrst ter splošen porast gostote primerkov in raznolikosti v vseh faciesih razen v bindstone in mudstone faciesih. Zanimivo je, da hettangijske združbe izkazujejo precejšnjo podobnost v sestavi in prevlado oportunističnih vrst, medtem ko so razlike med združbami glede na facies v mlajših plasteh bolj izrazite. Sprememba v velikosti vrste M. asiagoensis je znotraj p...

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Trophic regimes of benthic foraminiferal assemblages in Lower Jurassic shallow water carbonates from northeastern Italy (Calcari Grigi, Trento Platform, Venetian Prealps)

Cited by 66 publications

References 19 publications

Evolution and Geological Significance of Larger Benthic Foraminifera

Evolution and Geological Significance of Larger Benthic Foraminifera

Megaspores from the Lower Jurassic (Pliensbachian) Rotzo Formation (Monti Lessini, northern Italy) and their palaeoenvironmental implications

Early Jurassic foraminiferal assemblages in platform carbonates of Mt. Krim, central Slovenia

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