Illustrated glossary of terms used in foraminiferal research

Hottinger, Lukas

doi:10.4267/2042/5832

Cited by 146 publications

(155 citation statements)

References 20 publications

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“…Their opinion is followed in this paper. kaBal and taSli (2003) further documented the variability of the species and recognized three morphotypes, two corresponding to different onthogenetic stages of the megalospheric generation and one to microspheric tests (kaBal & taSli, 2003). Septfontaine (1988) and kaBal and taSli (2003) (Septfontaine, 1988).…”

Section: Descriptionmentioning

confidence: 97%

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Lower Jurassic foraminiferal biostratigraphy of Podpeč Limestone (External Dinarides, Slovenia)

Gale¹

2014

Geologija

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The "Podpe~ limestone" outcropping south of Ljubljana (Central Slovenia), deposited at the northern edge of the Dinaric Carbonate Platform, comprises mostly dark grey and black thick bedded oolitic limestone, and is renowned for several horizons of lithiotid bivalves. Foraminifera, especially Orbitopsella spp., are rather frequent, but no detailed distribution of foraminiferal taxa was given. Furthermore, documentation of foraminiferal species is scarce, with few photographs. In order to give a comprehensive picture of foraminiferal assemblage of the "Podpe~ limestone" and its distribution, three sections were measured in detail and sampled. The foraminiferal assemblage consists of 17 species, described in detail. On the basis of foraminifera, the investigated part of the "Podpe~ limestone" belongs to the Lituosepta recoarensis and Orbitopsella praecursor biozones of early Late Sinemurian and Early Pliensbachian age, respectively. Izvle~ekTemno sivi in ~rni plastnati ooidni "podpe{ki apnenec", ki ga najdemo južno od Ljubljane (osrednja Slovenija), je nastajal na severnem robu Dinarske karbonatne platforme in je znan po ve~ horizontih litiotidnih {koljk. Poleg ostale makrofavne, so v njem dokaj pogoste tudi foraminifere, posebno Orbitopsella spp. Žal so ta poro~ila slikovno slabo dokumentirana in ponavadi brez natan~ne stratigrafske umestitve. Da bi prou~ili celotno foraminiferno združbo in razpon posameznih taksonov, sem posnel tri detajlne sedimentolo{ke profile. Na podlagi presekov v zbruskih sem dolo~il 17 vrst bento{kih foraminifer in ugotovili, da raziskani del združbe "podpe{kega apnenca" pripada Lituosepta recoarensis in Orbitopsella praecursor bioconama zgodnje poznesinemurijske in zgodnjepliensbachijske starosti.

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Section: Descriptionmentioning

confidence: 97%

“…The specimen in azerêDo et al (2003) Septfontaine, 1986;BaSSoullet et al, 1999); Late Sinemurian -Toarcian of Central Taurides, Turkey (kaBal & taSli, 2003). Latest Sinemurian -Pliensbachian according to BaSSoullet (1997).…”

Section: Descriptionmentioning

confidence: 99%

Lower Jurassic foraminiferal biostratigraphy of Podpeč Limestone (External Dinarides, Slovenia)

Gale¹

2014

Geologija

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“…In the part where OOL was curled up to reveal the inner side (see Figure 3B), convex structures corresponding to pore lining were seen ( Figure 5D). This has been termed 'pore funnel' by Hottinger (2006), which we adopt here. Interestingly, pores cannot 30 be seen at this stage from the outer side on the OOL with SEM observation (Figure 5A-B), and the OOL appears entirely smooth in the parts where the framework has been filled completely.…”

Section: Middle Stagementioning

confidence: 99%

Weaving of biomineralization framework in rotaliid foraminifera: Implications for paleoenvironmental reconstructions

Nagai

Uematsu²,

Chen

et al. 2018

Preprint

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Abstract. Foraminifera are commonly used to reconstruct paleoenvironmental conditions based on the taxonomical composition, as well as elemental and/or isotopic signatures of their calcareous tests. A major problem, often referred to as the 'vital effect', is that such geochemical signatures stored in inorganic calcium carbonates differ greatly under the same environmental conditions. This effect was previously explained by proportional contributions from passive vs active ion 5 transport patterns, but their details are still investigated. In this study, the functional role of pseudopodial structures during chamber formation is elucidated by detailed observation of Ammonia beccarii (Linnaeus) using a time-lapse optical imaging system and high-resolution electron microscopy. For the first time, we document triple organic layers sandwiching carbonate precipitation sites. The three major organic layers (outer organic layer, primary organic sheet, and inner organic layer) are formed by an initial framework of pseudopodia overlaid with further layer-like pseudopodia. The POS seems to facilitate 10 early calcium carbonate nucleation, then entrapped by double precipitation sites. We further show that calcification starts when outer/inner organic layers still reveal tiny gaps (holes within the framework) that may serve as pathways for passive ion exchange (e.g., Mg 2+ ) between seawater and the confined precipitation space. Nevertheless, the majority of wall thickening occurs when the precipitation site is completely isolated from seawater that implicates of active ion exchange.This may explain the differences in Mg/Ca ratios in early and later stages of calcification observed in previous studies. Our 15 study resolves a key 'missing piece' in understanding foraminiferal calcification. The 'vital effect' is directly linked to spatio-temporal organization of the 'biomineralization sandwich' controlled by the three major organic layers. This study exemplifies the importance of culture experiments and in-depth observations of living organisms in order to interpret and calibrate biogeochemical proxies.

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“…Finally, the hierarchy of taxonomic criteria sketched by HOTTINGER (1978 , Table 1) has been taken into account in the elaboration of our proposals. In order to facilitate the comparison between the architectural characteristics of the genera of agglutinated foraminifera described in this paper, the architectural and structural terms are those referred to by HOTTINGER (2006 Remarks: Following the authors of the Order Loftusiida, it includes all agglutinated foraminifera with coiled arrangement of chambers in early stage, that later may be uncoiled, and with complex exoskeleton. The simple forms with the same chamber arrangement are grouped in the Order Lituolida LANKESTER, 1885.…”

Section: Systematic Micropaleontologymentioning

confidence: 99%

Selected agglutinated larger foraminifera from the Font de les Bagasses unit (early Campanian, southern Pyrenees)

Albrich¹,

Boix²,

Caus³

2015

Carnets Geol.

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Abstract:The Font de les Bagasses marls and marly limestones (Montsec Mountains, NE Spain) host a rich assemblage of larger foraminifera, that was described for the first time in the early 20th Century from the currently submerged locality of Tragó de Noguera (Marginal Mountains). In this paper, a detailed architectural study has been carried out on selected, agglutinated larger foraminifera, which include Choffatella aff. rugoretis GENDROT, Hemicyclammina chalmasi (SCHLUMBERGER), Cuneolina conica ORBIGNY, Cuneolina cylindrica HENSON, and Dictyopsella kiliani MUNIER-CHALMAS. Moreover, it presents their biostratigraphic range and the range of the associated porcellaneous and lamellar-perforate for aminifera in the study area. The assemblage is Early Campanian in age.

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Illustrated glossary of terms used in foraminiferal research

Cited by 146 publications

References 20 publications

Lower Jurassic foraminiferal biostratigraphy of Podpeč Limestone (External Dinarides, Slovenia)

Lower Jurassic foraminiferal biostratigraphy of Podpeč Limestone (External Dinarides, Slovenia)

Weaving of biomineralization framework in rotaliid foraminifera: Implications for paleoenvironmental reconstructions

Selected agglutinated larger foraminifera from the Font de les Bagasses unit (early Campanian, southern Pyrenees)

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