Cladtertia

Cladtertia
	Microscopic image of Cladtertia collaboinventa. Scale bar is 0.2 mm.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Placozoa
Class:	Uniplacotomia
Order:	Hoilungea
Family:	Cladtertiidae; Tessler et al., 2022
Genus:	Cladtertia; Tessler et al., 2022
Species:	C. collaboinventa
Binomial name
	Cladtertia collaboinventa; Tessler et al., 2022

Cladtertia is a genus of placozoan discovered in 2022, whose only currently described species is Cladtertia collaboinventa. However, the genus is known to contain several other species, awaiting a formal description. Its closest described relative is Hoilungia hongkongensis, with whom it forms the order Hoilungea. After Trichoplax, Hoilungia and Polyplacotomia, it is the fourth described placozoan genus (and species) up to date.[1]

Etymology

The genus name comes from Ancient Greek kládos (clade) and Latin tertius (the third), referring to its specimens previously being assigned to placozoan Clade III in literature.

Reproduction

Uniquely among placozoans, sexual reproduction has been reported to occur in the placozoan clade identified with strain H8,[2][3] which was later found to belong to genus Cladtertia.[1] Intergenic recombination was observed, as well as other hallmarks of sexual reproduction such as sharing of alleles between heterozygous and homozygous individuals.

References

Tessler, Michael; Neumann, Johannes S.; Kamm, Kai; Osigus, Hans-Jürgen; Eshel, Gil; Narechania, Apurva; Burns, John A.; DeSalle, Rob; Schierwater, Bernd (2022-12-08). "Phylogenomics and the first higher taxonomy of Placozoa, an ancient and enigmatic animal phylum". Frontiers in Ecology and Evolution. 10. doi:10.3389/fevo.2022.1016357.
Signorovitch, A.Y.; Dellaporta, S.L.; Buss, L.W. (2005). "Molecular signatures for sex in the Placozoa". Proceedings of the National Academy of Sciences of the United States of America. 102 (43): 15518–22. Bibcode:2005PNAS..10215518S. doi:10.1073/pnas.0504031102. PMC 1266089. PMID 16230622.
Charlesworth, D. (2006). "Population genetics: Using recombination to detect sexual reproduction: The contrasting cases of Placozoa and C. elegans". Heredity. 96 (5): 341–342. doi:10.1038/sj.hdy.6800809. PMID 16552431. S2CID 44333533.

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[Tessler_et_al_2022-1] Tessler, Michael; Neumann, Johannes S.; Kamm, Kai; Osigus, Hans-Jürgen; Eshel, Gil; Narechania, Apurva; Burns, John A.; DeSalle, Rob; Schierwater, Bernd (2022-12-08). "Phylogenomics and the first higher taxonomy of Placozoa, an ancient and enigmatic animal phylum". Frontiers in Ecology and Evolution. 10. doi:10.3389/fevo.2022.1016357.

[pmid16230622-2] Signorovitch, A.Y.; Dellaporta, S.L.; Buss, L.W. (2005). "Molecular signatures for sex in the Placozoa". Proceedings of the National Academy of Sciences of the United States of America. 102 (43): 15518–22. Bibcode:2005PNAS..10215518S. doi:10.1073/pnas.0504031102. PMC 1266089. PMID 16230622.

[pmid16552431-3] Charlesworth, D. (2006). "Population genetics: Using recombination to detect sexual reproduction: The contrasting cases of Placozoa and C. elegans". Heredity. 96 (5): 341–342. doi:10.1038/sj.hdy.6800809. PMID 16552431. S2CID 44333533.