A New Allogromiid Foraminifer Niveus Flexilis Nov. Gen., Nov. Sp., From Coastal Georgia, Usa: Fine Structure and Gametogenesis

Altin, Deniz Z.; Habura, Andrea; Goldstein, Susan T.

doi:10.2113/gsjfr.39.2.73

Cited by 15 publications

(5 citation statements)

References 48 publications

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“…Sieving with fine meshes was not carried out so as not to overlook smaller specimens, which were only seen by coverslip-capture, and not risk damage to larger, delicate specimens such as those surrounded by mud balls. It is possible, however, that some of the smaller types of monothalamids were merely juvenile versions of larger, sometimes unseen specimens, as size is usually an indication of age (Murray & Alve, 2000; Altin et al ., 2009; Goldstein & Alve, 2011; Altin-Ballero et al ., 2013). To determine whether this is the case will require culturing the specimens for extended periods of time because foraminifera have complex reproductive cycles, but this has proved to be difficult for most species of foraminifera (Goldstein, 1999).…”

Section: Discussionmentioning

confidence: 99%

“…This is the first report on the diversity of soft-walled monothalamids in an intertidal habitat in north-west Scotland, a temperate Only one other study has been done on monothalamids in a British intertidal region, in an estuary on the south coast of England, where an abundance of Psammophaga species was found (Larkin & Gooday, 2004). Other intertidal monothalamids have been described in much warmer, tropical or subtropical areas, namely the Vellaria genus which was discovered in an estuary in India (Gooday & Fernando, 1992), Iridia diaphana in a subtropical reef system in Florida Key, and various species of Allogromia and Psammophaga monothalamids in low salinity salt marshes at Sapelo Island Georgia (Altin et al, 2009;Goldstein et al, 2010;Habura et al, 2010;Altin-Ballero et al, 2013).…”

Section: Novelty and Limitations Of The Studymentioning

confidence: 99%

“…It was not until the 21st century that more extensive worldwide surveys were made of benthic monothalamids, in marine settings covering intertidal zones down to abyssal depths of 4000 m. As well as providing descriptions of novel species and genera many of these studies have also included molecular phylogenetic data that have provided important information on the evolutionary history of monothalamid foraminifera. Examples of where the more recent surveys have been conducted include the Adriatic Sea (Sabbatini et al ., 2010, 2012, 2013), Antarctica and the Southern Ocean (Gooday et al ., 1996; Pawlowski et al ., 2002 a ; Majewski, 2005; Pawlowski et al ., 2005, 2008; Majewski et al ., 2007; Sinniger et al ., 2008; Cedhagen et al ., 2009; Pawlowski & Majewski, 2011), Black Sea (Gooday et al ., 2006, 2010; Anikeeva et al ., 2013; Anikeeva & Gooday, 2016), Eastern Pacific coast of the USA (Bernhard et al ., 2006), Hamble Estuary, England (Larkin & Gooday, 2004), coast of Iceland (Voltski & Pawlowski, 2015), North-east Atlantic (Gooday, 1986, 2002; Morigi et al ., 2012), Svalbard fjords (Gooday et al ., 2005; Majewski et al ., 2005; Sabbatini et al ., 2007), Beagle Channel, South America (Gschwend et al ., 2016) and the Western Atlantic coast of the USA (Habura et al ., 2008; Altin et al ., 2009; Goldstein et al ., 2010; Altin-Ballero et al ., 2013). Many new monothalamid lineages are currently also being discovered using environmental DNA (eDNA) for species which so far have no morphological counterparts (Habura et al ., 2004, 2008; Pawlowski et al ., 2011, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Soft-walled monothalamid foraminifera from the intertidal zones of the Lorn area, north-west Scotland

Henderson

2023

J. Mar. Biol. Ass.

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Recent advances in molecular phylogeny and increasing numbers of studies carried out worldwide in subtidal and deep-water marine sites have confirmed that monothalamid foraminifera represent a significant component of the marine benthos. Fewer studies have been carried out on monothalamids in littoral zones, and here I describe more than 13 novel morphotypes of soft-walled monothalamids found at several intertidal sites in the Lorn area of north-west Scotland. Samples of sediment were collected from these areas and monothalamid tests were removed from the mud by direct manipulation with brushes, by coverslip-capture, by capture with a magnet for those with magnetic particles or by extraction from mud balls. Attached forms of tests from the same sites were isolated from collected seaweed blades, pebbles and decaying shells. Monothalamids were observed live and photographed in their natural colours, followed by examination after preservation in alcohol and embedding in glycerol. The greatest diversity of species was found to be at estuaries near to the mouths of the sea lochs, and the abundance of some of the species varied with the time of the year, being different for each species. The observed taxa included a Vellaria sp. and Psammophaga sp., two allogromiids, three saccamminids and six undetermined species; each assemblage of specimens may have contained more than one species not readily discernible by morphological characteristics alone. Taxonomic parallels between the described specimens and those in reports for other parts of the world and in deeper waters in western Scotland are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Novelty and Limitations Of The Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soft-walled monothalamid foraminifera from the intertidal zones of the Lorn area, north-west Scotland

Henderson

2023

J. Mar. Biol. Ass.

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“…In comparison to calcareous and agglutinated multi-chambered taxa, single-chambered foraminifera, or 'monothalamids' only recently were recognized as important taxonomic group, with a number of studies documenting their diversity in shallow-water settings (Altin et al 2009, Goldstein et al 2010, Gooday et al 2011, Majewski et al 2005, Pawlowski & Majewski 2011, Sinniger et al 2008, Voltski et al 2014. In addition to these studies based on morphological and molecular analysis of isolated specimens, recent years have seen the emergence of environmental DNA (eDNA) studies, which enable the assessment of foraminiferal diversity based on metabarcoding approach (Habura et al 2004, Bernhard et al 2013, Lejzerowicz et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Flexammina islandica gen. nov. sp. nov. and some new phylotypes of monothalamous foraminifera from the coast of Iceland

Voltski

Pawłowski

2015

Zootaxa

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Monothalamous (single-chambered) foraminifera comprise a poorly known group, the diversity of which is strongly underestimated according to environmental DNA surveys. The gross morphology of monothalamids offers few distinguishing features; their organic-walled or agglutinated tests are often very delicate and make isolation difficult. Here, we use an integrated taxonomic approach, including morphological and molecular analysis, to examine the diversity of monothalamids in a shallow subtidal area on the coast of Iceland. We report nine new phylotypes of single-chambered foraminifera distinguished by SSU rDNA sequences. Among them, we establish a new genus Flexammina and a new species Flexammina islandica, possessing a very pliable, finely agglutinated test capable of extreme shape transformations. According to molecular data, F. islandica belongs to the monothalamid clade M, which also includes the well-known genus Allogromia. In addition, we provide brief descriptions and illustrations of nine other monothalamous foraminifera isolated from the same area. Three of them are closely related to some unidentified environmental sequences and serve as the first microscopic documentation of these anonymous lineages.

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“…Many new monothalamous species have been described in the last decade (Altin et al. ; Apothéloz‐Perret‐Gentil et al. ; Gooday and Pawlowski ; Gooday et al.…”

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confidence: 99%

Molecular Phylogeny and Morphology of Leannia veloxifera n. gen. et sp. Unveils a New Lineage of Monothalamous Foraminifera

Apothéloz-Perret-Gentil

Pawłowski

2014

J Eukaryotic Microbiology

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Monothalamous (single-chambered) foraminifera have long been considered as the "poor cousins" of multichambered species, which calcareous and agglutinated tests dominate in the fossil record. This view is currently changing with environmental DNA surveys showing that the monothalamids may be as diverse as hard-shelled foraminifera. Yet, the majority of numerous molecular lineages revealed by eDNA studies remain anonymous. Here, we describe a new monothalamous species and genus isolated from the sample of sea grass collected in Gulf of Eilat (Red Sea). This new species, named Leannia veloxifera, is characterized by a tiny ovoid theca (about 50-100 μm) composed of thin organic wall, with two opposite apertures. The examined individuals are multinucleated and show very active reticulopodial movement. Phylogenetic analyses of SSU rDNA, actin, and beta-tubulin (ß-tubulin) show that the species represents a novel lineage branching separately from other monothalamous foraminifera. Interestingly, the SSU rDNA sequence of the new species is very similar to an environmental foraminiferal sequence from Bahamas, suggesting that the novel lineage may represent a group of shallow-water tropical allogromiids, poorly studied until now.

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A New Allogromiid Foraminifer Niveus Flexilis Nov. Gen., Nov. Sp., From Coastal Georgia, Usa: Fine Structure and Gametogenesis

Cited by 15 publications

References 48 publications

Soft-walled monothalamid foraminifera from the intertidal zones of the Lorn area, north-west Scotland

Soft-walled monothalamid foraminifera from the intertidal zones of the Lorn area, north-west Scotland

Flexammina islandica gen. nov. sp. nov. and some new phylotypes of monothalamous foraminifera from the coast of Iceland

Molecular Phylogeny and Morphology of Leannia veloxifera n. gen. et sp. Unveils a New Lineage of Monothalamous Foraminifera

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