Foraminiferal Assemblages From the Bajocian Global Stratotype Section and Point (Gssp) at Cape Mondego (Portugal)

Canales, María Luisa González de; Henriques, Maria Helena

doi:10.2113/gsjfr.43.2.182

Cited by 18 publications

(23 citation statements)

References 34 publications

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“…The stratigraphic distribution of the identified foraminiferal species across the Aalenian–Bajocian boundary at Serra da Boa Viagem II section (SBVII) provides a detailed foraminiferal‐based biostratigraphic zonation accurately calibrated with a detailed ammonite‐based biostratigraphic zonation, both correlated with data described for the Bajocian GSSP (Fernández López et al ., , ; Henriques et al ., , ; Rocha et al ., ; Henriques, ; Canales and Henriques, , ).…”

Section: Results and Interpretationmentioning

confidence: 98%

“…The Bajocian GSSP has been defined by the first occurrence of the ammonite assemblage including Hyperlioceras mundum (Buckman) and related species – H. furcatum (Buckman), Braunsina aspera Buckman, B. elegantula (Buckman) – by the onset of different calcareous nannofossil species of Watznaueria , and by an inversion from reversed to normal polarity (Henriques et al ., ). More recently, other fossil groups have been studied in detail across the GSSP, namely brachiopods (Andrade, , ), calcareous nannoplankton (Neto, ; Neto et al ., ; López‐Otálvaro et al ., ) and benthic foraminifers (Canales and Henriques, , ).…”

Section: Introductionmentioning

confidence: 99%

“…In the Murtinheira section, Canales and Henriques () identified the Lenticulina quenstedti Zone, ranging from the upper part of the Gigantea Subzone of the Bradfordensis Zone (middle Aalenian), to the lower part of the Discites Zone (lower Bajocian). These authors defined the Ramulina spandeli Zone, beginning at the top of the preceding zone and having, for the moment, an undefined upper boundary.…”

Section: Introductionmentioning

confidence: 99%

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High resolution ammonite–benthic foraminiferal biostratigraphy across the Aalenian–Bajocian boundary in the Lusitanian Basin (Portugal)

2014

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This work describes the ammonite and benthic foraminiferal assemblages recorded across the Aalenian-Bajocian boundary of the Serra da Boa Viagem II section, located about 6 km to the east of the Bajocian GSSP (Murtinheira, Portugal), and calibrated to the standard ammonite zonation previously established for the Lusitanian Basin. A total of 220 ammonite specimens referred to 30 fossiliferous levels were collected and identified throughout the section, enabling the recognition of the Concavum Zone (Concavum and Limitatum subzones) of the upper Aalenian, and the Discites Zone of the lower Bajocian. A total of 2356 foraminifers were obtained from the 16 samples collected along the section, corresponding to 4 suborders, 8 families, 16 genera and 44 species.The occurrence of Lenticulina quenstedti (Gümbel) has enabled the recognition of the Lenticulina quenstedti Zone, ranging from the Bradfordensis Zone (middle Aalenian) to the lower Discites Zone (lower Bajocian). The first record of Ramulina spandeli Paalzow, whose occurrence, up to now, was limited in the Lusitanian Basin to the Murtinheira section (the Bajocian GSSP), highlights the usefulness of the Ramulina spandeli Zone, with its lower boundary referred to the lower Discites Zone (lower Bajocian). Other bioevents displaying local, basinal or regional biostratigraphic interest have also been identified.The benthic foraminiferal record here presented, accurately calibrated with the ammonite record, aims at contributing to support the recognition of the Lenticulina quenstedti Zone and the Ramulina spandeli Zone as formal biostratigraphic units integrating the biostratigraphic scale based on benthic foraminifers for the Aalenian-Bajocian boundary in the Lusitanian Basin (Portugal). Figure 3. Lithological succession of the Serra da Boa Viagem II section, biostratigraphic units based on ammonites and occurrence of the identified ammonite taxa along the section.Figure 5. Lithological succession at the Serra da Boa Viagem II section and biostratigraphic units based on ammonites and benthic foraminifers. The occurrence and relative abundance of the identified foraminiferal taxa recorded along the studied stratigraphic interval are represented by dots with different diameter (R. s.: Ramulina spandeli Zone).

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Section: Results and Interpretationmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High resolution ammonite–benthic foraminiferal biostratigraphy across the Aalenian–Bajocian boundary in the Lusitanian Basin (Portugal)

2014

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“…Stratigraphic range. Lower to middle Jurassic (Strickland, 1846;Canales & Henriques, 2013 Remarks. It differs from Reinholdella sp.…”

Section: Kochhann Et Al -Benthic Foraminifera and Ostracoda From Thementioning

confidence: 99%

“…For instance, the species Astacolus dorbignyi, Nodosaria fontinensis, Pseudonodosaria vulgata, Lenticulina muensteri, Citharina clathrata and Eoguttulina liassica occur in the Aalenian-Bajocian GSSP of the Murtinheira section, west Portugal (Canales & Henriques, 2008. Canales & Henriques (2013) suggested that Aalenian-Bajocian benthic foraminifera from the Murtinheira section are typical of the Boreal Realm. This paleozoogeographic similarity contrasts to some degree to the data of Parent et al (2013).…”

Section: Foraminiferamentioning

confidence: 99%

Benthic Foraminifera and Ostracoda from the Dalichai Formation (Aalenian–Bajocian) at Telma-Dareh, Alborz Mountains, Northern Iran

Kochhann¹,

Bergue

Falahatgar

et al. 2015

Rev. bras. paleontol.

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-Aalenian-Bajocian benthic foraminiferal and ostracode assemblages of the Dalichai Formation (lithologic unit III) at Telma-Dareh, Alborz Mountains (northern Iran) are presented herein. Twenty-four foraminiferal taxa were identifi ed, with the genera Reinholdella, Epistomina and Lenticulina as the dominant taxa. The dominance of r-selected strategists among foraminifera suggests the occurrence of stressing paleoenvironmental conditions, probably related to bottom-water oxygen levels, during the deposition of the studied strata. The foraminiferal assemblages studied herein are similar to other Boreal ones in paleobiogeographic terms. The ostracode assemblages present low abundance, low species richness and poor preservation, which did not allow any identifi cation at species level. A possible record of Majungaella is briefl y discussed due to its paleozoogeographic signifi cance. Cytherella, Paracypris and Pontocyprella are the richest genera with two species each.Key words: benthic foraminifera, ostracodes, Dalichai Formation, Alborz Mountains, Iran. RESUMO -Assembleias de foraminíferos bentônicos e ostracodes do intervalo Aaleniano-Bajociano correspondentes à Formação Dalichai (unidade litológica III), em Telma-Dareh, Montanhas Alborz (norte do Irã) são aqui apresentadas. Vinte e quarto táxons de foraminíferos bentônicos foram identifi cados, sendo os gêneros Reinholdella, Epistomina e Lenticulina dominantes. O predomínio de estrategistas-r entre os foraminíferos sugere a ocorrência de condições ambientais estressantes durante a deposição destes estratos, provavelmente relacionadas aos níveis de oxigênio nas águas de fundo. As assembleias de foraminíferos aqui estudadas são similares a outras descritas para o domínio Boreal. As assembleias de ostracodes apresentam espécimes mal preservados, baixa abundância e baixa riqueza. Um possível registro de Majungaella é brevemente discutido devido ao seu signifi cado paleozoogeográfi co. Cytherella, Paracypris e Pontocyprella são os gêneros mais ricos com duas espécies registradas cada.Palavras-chave: foraminíferos bentônicos, ostracodes, Formação Dalichai, Montanhas Alborz, Irã.

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Benthic foraminiferal assemblages across the Aalenian–Bajocian boundary in the Iberian and Basque-Cantabrian basins (North Spain)

Silva

Canales

Henriques

et al. 2019

Palaeobio Palaeoenv

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Foraminiferal Assemblages From the Bajocian Global Stratotype Section and Point (Gssp) at Cape Mondego (Portugal)

Cited by 18 publications

References 34 publications

High resolution ammonite–benthic foraminiferal biostratigraphy across the Aalenian–Bajocian boundary in the Lusitanian Basin (Portugal)

High resolution ammonite–benthic foraminiferal biostratigraphy across the Aalenian–Bajocian boundary in the Lusitanian Basin (Portugal)

Benthic Foraminifera and Ostracoda from the Dalichai Formation (Aalenian–Bajocian) at Telma-Dareh, Alborz Mountains, Northern Iran

Benthic foraminiferal assemblages across the Aalenian–Bajocian boundary in the Iberian and Basque-Cantabrian basins (North Spain)

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