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Sappinia pedata
Sappinia pedata is a free living amoeboid organism, first described by Pierre Augustin Dangeard in 1896. It belongs to the genus Sappinia within the Thecamoebida clade of Amoebozoa and is characterized by its unique monopodial locomotion and cell surface morphology. S. pedata has been found in various habitats worldwide, mostly on herbivore dung, decaying plant matter, and soil. The species has gained attention due to its potential medical relevance and has been the subject of most recent and emerging studies in Protistology and Eukaryotic Microbiology as a whole.
The name "Sappinia" was named after the late Mister Sappin-Trouffy, a mycologist at the Paris Academy of Sciences while the Latin word "pedata" means foot-like.
Sappinia pedata is a discosean amoebozoan that forms a highly supported clade with its sister species Sappinia diploidea, and the newly described species Sappinia platani, all of which are closely related to two Thecamoeba spp. within the Thecamoebida clade. The genus Sappinia, to which S. pedata belongs, is notable for the suspected presence of sexual reproduction, setting it apart from other flabellinid genera for which the sexual status has not been explicitly established.
Recent phylogenetic studies have suggested that the particular "brain-eating" strain identified in a case of amoebic encephalitis, may represent a new species more closely related to S. pedata than S. diploidea and S. platani. However, further research is needed to confirm the taxonomic status of this strain.
The description of S. platani as a novel species within the genus Sappinia further highlights the genetic diversity and evolutionary significance of this group of organisms and provides insight into the diversity and evolution of this major eukaryotic lineage.
The species S. pedata was originally established by Pierre Augustin Dangeard in 1896, who described it as a free-living, mostly binucleate amoeba with a dense glycocalyx after isolating the species from old cultures of horse dung.
Dangeard observed many remarkable things about S. pedata including cysts he described as pedicelled and a type of nuclear division that seemed to result in the formation of two closely apposed nuclei, and in some cases, four nuclei. These observations were later confirmed by Matthew Brown and colleagues well over a century later, after establishing a neotype for the same species (ATCC PRA-232) in 2007. However, no stalked cysts were found this time.
The term "Standing amoeba" was coined by Brown et al (2007) after thorough observation of the lack of a cell wall in S. pedata, concluding that the cells were neither encysted nor formed spores as described in earlier publications.
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Sappinia pedata
Sappinia pedata is a free living amoeboid organism, first described by Pierre Augustin Dangeard in 1896. It belongs to the genus Sappinia within the Thecamoebida clade of Amoebozoa and is characterized by its unique monopodial locomotion and cell surface morphology. S. pedata has been found in various habitats worldwide, mostly on herbivore dung, decaying plant matter, and soil. The species has gained attention due to its potential medical relevance and has been the subject of most recent and emerging studies in Protistology and Eukaryotic Microbiology as a whole.
The name "Sappinia" was named after the late Mister Sappin-Trouffy, a mycologist at the Paris Academy of Sciences while the Latin word "pedata" means foot-like.
Sappinia pedata is a discosean amoebozoan that forms a highly supported clade with its sister species Sappinia diploidea, and the newly described species Sappinia platani, all of which are closely related to two Thecamoeba spp. within the Thecamoebida clade. The genus Sappinia, to which S. pedata belongs, is notable for the suspected presence of sexual reproduction, setting it apart from other flabellinid genera for which the sexual status has not been explicitly established.
Recent phylogenetic studies have suggested that the particular "brain-eating" strain identified in a case of amoebic encephalitis, may represent a new species more closely related to S. pedata than S. diploidea and S. platani. However, further research is needed to confirm the taxonomic status of this strain.
The description of S. platani as a novel species within the genus Sappinia further highlights the genetic diversity and evolutionary significance of this group of organisms and provides insight into the diversity and evolution of this major eukaryotic lineage.
The species S. pedata was originally established by Pierre Augustin Dangeard in 1896, who described it as a free-living, mostly binucleate amoeba with a dense glycocalyx after isolating the species from old cultures of horse dung.
Dangeard observed many remarkable things about S. pedata including cysts he described as pedicelled and a type of nuclear division that seemed to result in the formation of two closely apposed nuclei, and in some cases, four nuclei. These observations were later confirmed by Matthew Brown and colleagues well over a century later, after establishing a neotype for the same species (ATCC PRA-232) in 2007. However, no stalked cysts were found this time.
The term "Standing amoeba" was coined by Brown et al (2007) after thorough observation of the lack of a cell wall in S. pedata, concluding that the cells were neither encysted nor formed spores as described in earlier publications.