Conicocassis, a new genus of Arcellinina (testate lobose amoebae)

Nasser, Nawaf A.; Patterson, R. Timothy

doi:10.26879/538

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…pontigulasiformis also show this species to be relatively rare in the contemporary record (Beyens et al, 1986;Beyens and Chardez, 1995;Gavel et al, 2018), but have been reported in sub-Arctic lakes (Nasser and Patterson, 2015).…”

Section: Testate Amoebae Analysismentioning

confidence: 95%

Evidence for ecosystem state shifts in Alaskan continuous permafrost peatlands in response to recent warming

Taylor

Swindles

Morris

et al. 2019

Quaternary Science Reviews

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Section: Testate Amoebae Analysismentioning

confidence: 95%

Evidence for ecosystem state shifts in Alaskan continuous permafrost peatlands in response to recent warming

Taylor

Swindles

Morris

et al. 2019

Quaternary Science Reviews

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“…In parallel, Gauthier-Lièvre and Thomas (1958), and more recently Mazei and Warren (2012, conducted surveys of the genus Difflugia that resulted in the unofficial subdivision of the genus into small subgroups based on test morphology. There have also been more formal efforts to describe new genera based on taxa formerly attributed to Difflugia (e.g., Patterson, 2014;Nasser and Patterson, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…As part of ongoing research to determine the positioning of arcellinidans within lake ecosystems (e.g., Patterson et al, 2013Patterson et al, , 2015Macumber et al, 2014;Nasser et al, 2016Nasser et al, , 2020Roe et al, 2017), we aim to integrate apparent taxonomic relationships into the work, which has resulted in the determination that many taxa, particularly many attributed to Difflugia, require to have their systematic taxonomic placements re-evaluated (e.g., Nasser and Patterson, 2015;Patterson et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Erugomicula, a new genus of Arcellinida (testate lobose amoebae)

Nasser¹,

Gregory²,

Patterson³

et al. 2021

Palaeontol Electron

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Testate lobose amoebae of the order Arcellinida are a diverse, cosmopolitan group of shelled protists found in many environments, including freshwater habitats, peatlands, and soils. Their decay-resistant tests make them an important fossil group for reconstructing Quaternary environments. Within the family Difflugidae Stein, 1859 more than 300 species and 200 sub-species have been attributed to the genus Difflugia Leclerc, 1815. Although carried out on only a few taxa, molecular evidence has demonstrated that test morphology is more important than test composition in categorizing distinct taxa within the Arcellinida. The type species of Difflugia, D. proteiformis Lamarck, 1816, is characterized by a terminal aperture and an elongate acuminate test. The morphology of D. proteiformis is vastly different from most species assigned to Difflugia, explaining its polyphyletic status. We reclassify Difflugia bidens Penard, 1902 as type species of Erugomicula, a new genus within the Difflugidae, which is distinguished from other taxa within Difflugia by its broad, ovoid test, and distinct compression. Based on the compressed morphology of the test, which is not a characteristic of the Difflugiidae, we tentatively assign Erugomicula to the family Hyalospheniidae.

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“…Arcellinidans are a group of shelled benthic protists commonly found in Quaternary lacustrine sediments. Their modern-day distribution is global, and they occur from the equator to the poles, in a variety of fresh to brackish aquatic and terrestrial habitats (Nasser and Patterson, 2015). They build their tests (microscopic shell) by agglutinating foreign particles (xenosomes) in an autogenous cement, usually mucopolysaccharides, thereby forming xenogenous tests.…”

Section: Introductionmentioning

confidence: 99%