A New Allogromiid Genus (Rhizopoda: Foraminiferida) from the Vellar Estuary, Bay of Bengal

Gooday, Andrew J.; Fernando, Olivia J.

doi:10.1144/jm.11.2.233

Cited by 17 publications

(13 citation statements)

References 12 publications

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“…Molecular and cell biological analyses independently indicate that the foraminifer we illustrate here is an allogromiid. The morphology of the SBB allogromiid is similar to two other Clade L allogromiids ( Ovammina opaca [ Dahlgren , 1962, 1967]; Cribrothalammina alba [e.g., Goldstein and Barker , 1990]) and also the allogromiid Vellaria [ Gooday and Fernando , 1992]. The SBB allogromiid is longer and more slender, has a thinner test wall, and has better developed cytoplasmic vacuoles than does O. opaca .…”

Section: Discussionmentioning

confidence: 52%

An endobiont‐bearing allogromiid from the Santa Barbara Basin: Implications for the early diversification of foraminifera

2006

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[1] Our current understanding of paleoecology and paleoceanography is largely based on the superb Phanerozoic fossil record of foraminiferan protists. The early history of the group is unresolved, however, because basal foraminiferans (allogromiids) are unmineralized and thus fossilize poorly. Molecular-clock studies date foraminiferal origins to the Neoproterozoic, but the deep sea, one of Earth's most extensive habitats and presently hosting a significant fraction of basal foraminiferal diversity, was probably anoxic at that time and, until now, anaerobic allogromiids were unknown. Molecular, cell, and ecological analyses reveal the presence of a previously unknown allogromiid inhabiting anoxic, sulfidic deep-sea sediments (Santa Barbara Basin, California). The fact that the new foraminifer harbors prokaryotic endobionts implicates symbiogenesis as a driving force in early foraminiferal diversification.

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Section: Discussionmentioning

confidence: 52%

An endobiont‐bearing allogromiid from the Santa Barbara Basin: Implications for the early diversification of foraminifera

2006

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“…The new species differs from Vellaria pellucidus and V. sacculus Gooday and Fernando 1992 in having a more lenticular shape and a less well-developed apertural structure. The test is less elongate than that of V. zucchellii Sabbatini et al 2004.…”

Section: Remarksmentioning

confidence: 63%

“…Vellaria pellucidus Gooday and Fernando 1992 Diagnosis. Test monothalamous, symmetrically oval; length <450 μm.…”

Section: Genus Vellaria Gooday and Fernando 1992mentioning

confidence: 99%

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New genera and species of monothalamous Foraminifera from Balaclava and Kazach’ya Bays (Crimean Peninsula, Black Sea)

2010

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We describe two new genera and species of monothalamous Foraminifera from a coastal site in Balaclava Bay, Crimea. Nellya rugosa gen. and sp. nov. has an elongate, approximately oval test, 120-360 μm long, somewhat resembling a rice grain and with a single nipple-like apertural structure located at the distal end, which is often rather truncated. The wall is whitish, opaque, somewhat flexible and composed of jumbled mineral grains, mostly <10 μm in size, overlying an inner organic layer. Cedhagenia saltatus gen. and sp. nov. has an approximately lenticular test, 150-300 μm long, with a single aperture usually associated with a short, delicate, slightly flared extension of test. The wall is whitish, flexible, translucent with shiny highlights, and composed of a thin layer of plate-like mineral grains, mostly <5 μm in size, overlying an inner organic layer. In both N. rugosa and C. saltatus, the cytoplasm is finely granular, without stercomata. A third species, identified as Vellaria pellucidus Gooday and Fernando 1992 and closely resembling the type material of this species from the Vellar Estuary (India), occurs occasionally in our Balaclava Bay material. Samples from another Crimean Bay (Kazach'ya) yielded an undescribed species of Psammophaga that is most similar to a species from Southampton (UK). The agglutinated wall encloses a cell body that is packed with mineral grains. Analysis of the SSU rDNA sequences obtained from these four species confirmed the position of Psammophaga and Vellaria. Nellya is shown to be a sister group to Vellaria + Psammophaga clade but its position is not well resolved. Cedhagenia belongs to a very different clade of monothalamous foraminiferans, which includes also Ovammina and Cribrothalammina.

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“…Most investigations are based on dried residues and therefore biased towards the calcareous and more robust agglutinated taxa, which survive desiccation. A number of soft-bodied monothalamous foraminifera have been already described (for example, Nyholm, 1974 and earlier papers;Goldstein and Barker, 1988;Gooday, 1990;Bernhard and Bowser, 1992;Gooday and Fernando, 1992) but these delicate taxa are not normally considered as part of the foraminiferal community. Soft-bodied monothalamous foraminifera are reported from marine habitats ranging from supralittoral sands and intertidal mudflats to deep-sea trenches.…”

Section: Discussionmentioning

confidence: 99%

Abyssal benthic foraminifera in the Polar Front region (Pacific sector): Faunal composition, standing stock and size structure

Sabbatini

Morigi

Ravaioli

et al. 2004

Chemistry and Ecology

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We have evaluated the quantitative composition of Rose Bengal-stained benthic foraminiferal assemblages of surface samples from two box cores (ANTA98-28 bc; ANTA01-01 bc) collected at the Polar Front in the Pacific sector of the Southern Ocean. Size structure, faunal composition and standing stock were analysed for living (Rose Bengalstained) and dead foraminifera. The size fractions among 63-150, 150-250 and >250 mm were counted separately in order to study the foraminiferal size distribution and to compare our results with earlier Antarctic studies. The low organic carbon content of the sediment, and hence the limited food availability, is reflected by very low standing stocks and low diversity values. Calcareous taxa dominated dead foraminiferal assemblages that were more diverse than the stained assemblages. In the sediment samples of ANTA01-01 bc, the living fauna contained agglutinated taxa and soft-shelled monothalamous forms. Our data represent the southernmost record of benthic foraminiferal community (63 S) from the Polar Front region in the Pacific sector. These samples provide further evidence for the occurrence of meiofaunal foraminifera in extreme environments, like the Antarctic region, where the uncoupled annual variations in temperature and production cause strong effects on the structure of benthic communities.

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A New Allogromiid Genus (Rhizopoda: Foraminiferida) from the Vellar Estuary, Bay of Bengal

Cited by 17 publications

References 12 publications

An endobiont‐bearing allogromiid from the Santa Barbara Basin: Implications for the early diversification of foraminifera

An endobiont‐bearing allogromiid from the Santa Barbara Basin: Implications for the early diversification of foraminifera

New genera and species of monothalamous Foraminifera from Balaclava and Kazach’ya Bays (Crimean Peninsula, Black Sea)

Abyssal benthic foraminifera in the Polar Front region (Pacific sector): Faunal composition, standing stock and size structure

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