|
Polyplacotomia
Polyplacotomia is a class of placozoans, to this date only comprising ''Polyplacotoma mediterranea ''Polyplacotoma mediterranea'' is a species in the phylum Placozoa, only representative of the genus ''Polyplacotoma'', and was discovered in the Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surro ...''. It was established in 2022. Their morphology is strikingly different from other placozoans in Uniplacotomia, exhibiting a highly ramified, branching structure with multiple amoeboid projections. It differs from Uniplacotomia by 76 uniquely present and 600 absent genes. References Placozoa Animal classes {{Animal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placozoa
Placozoa ( ; ) is a phylum of free-living (non-parasitic) marine invertebrates. They are blob-like animals composed of aggregations of cells. Moving in water by ciliary motion, eating food by Phagocytosis, engulfment, reproducing by Fission (biology), fission or budding, placozoans are described as "the simplest animals on Earth." Structural and molecular analyses have supported them as among the most basal animals, thus, constituting a primitive metazoan phylum. The first known placozoan, ''Trichoplax adhaerens'', was discovered in 1883 by the German zoologist Franz Eilhard Schulze (1840–1921).F. E. Schulze "''Trichoplax adhaerens'' n. g., n. s.", ''Zoologischer Anzeiger'' (Elsevier, Amsterdam and Jena) 6 (1883), p. 92. Describing the uniqueness, another German, Karl Gottlieb Grell (1912–1994), erected a new phylum, Placozoa, for it in 1971. Remaining a monotypic phylum for over a century, new species began to be added since 2018. So far, three other extant species have been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placozoans
Placozoa ( ; ) is a phylum of free-living (non-parasitic) marine invertebrates. They are blob-like animals composed of aggregations of cells. Moving in water by ciliary motion, eating food by engulfment, reproducing by fission or budding, placozoans are described as "the simplest animals on Earth." Structural and molecular analyses have supported them as among the most basal animals, thus, constituting a primitive metazoan phylum. The first known placozoan, ''Trichoplax adhaerens'', was discovered in 1883 by the German zoologist Franz Eilhard Schulze (1840–1921).F. E. Schulze "''Trichoplax adhaerens'' n. g., n. s.", ''Zoologischer Anzeiger'' (Elsevier, Amsterdam and Jena) 6 (1883), p. 92. Describing the uniqueness, another German, Karl Gottlieb Grell (1912–1994), erected a new phylum, Placozoa, for it in 1971. Remaining a monotypic phylum for over a century, new species began to be added since 2018. So far, three other extant species have been described, in two distinct cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyplacotoma Mediterranea
''Polyplacotoma mediterranea'' is a species in the phylum Placozoa, only representative of the genus ''Polyplacotoma'', and was discovered in the Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Eur .... They differ greatly from other species of placozoans with regards to their morphology and genetic makeup, and have been ranked in the separate class Polyplacotomia. ''P. mediterranea'' has the smallest mitogenome, the lowest GC content, and the smallest intergenic spacer regions of all placozoans. Their bodily structure consists of elongated polytomous body branches, as well as a maximum size that is greater than 10 mm in length. They have also been observed having a diet of algae. The mitochondrial genome of ''Polyplacotoma mediterranea'' is also very compact and cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyplacotomea
''Polyplacotoma mediterranea'' is a species in the phylum Placozoa, only representative of the genus ''Polyplacotoma'', and was discovered in the Mediterranean Sea. They differ greatly from other species of placozoans with regards to their morphology and genetic makeup, and have been ranked in the separate class Polyplacotomia. ''P. mediterranea'' has the smallest mitogenome, the lowest GC content, and the smallest intergenic spacer regions of all placozoans. Their bodily structure consists of elongated polytomous body branches, as well as a maximum size that is greater than 10 mm in length. They have also been observed having a diet of algae. The mitochondrial genome of ''Polyplacotoma mediterranea'' is also very compact and contains overlapping protein and tRNA gene codes. ''P. mediterranea'' exhibits significant genetic differences compared to other placozoans. Ancestral state reconstructions of gene content show that ''P. mediterranea'' does not have 600 orthologs that are f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uniplacotomia
Uniplacotomia is a class of placozoans encompassing the vast majority of the phylum, with the exception of '' Polyplacotoma''. It was established in 2022. It comprises the orders Trichoplacea, Cladhexea and Hoilungea. Their morphology is consistent across the class, resembling the typical '' Trichoplax'' as mostly rounded, flat organisms rather than the polytomous, branching structure exhibited by Polyplacotomia Polyplacotomia is a class of placozoans, to this date only comprising ''Polyplacotoma mediterranea ''Polyplacotoma mediterranea'' is a species in the phylum Placozoa, only representative of the genus ''Polyplacotoma'', and was discovered in t .... Despite a uniform exterior morphology, Uniplacotomia exhibits an important degree of diversity in molecular morphology, with at least two dozen species estimated to exist. References Animal classes Placozoa Parazoa {{animal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
