Hidden cell diversity in Placozoa: ultrastructural insights from Hoilungia hongkongensis
| Autor: | Leonid L. Moroz, Daria Y. Romanova, Jean Daraspe, Mikhail A. Nikitin, Dirk Fasshauer, Frederique Varoqueaux, Michael Eitel |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Cell type Histology biology Phylum Morphology (biology) Cell Biology biology.organism_classification Proteomics Genome Article Pathology and Forensic Medicine 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Body plan Evolutionary biology Ultrastructure Animals Placozoa Phylogeny 030217 neurology & neurosurgery |
| Zdroj: | Cell Tissue Res |
| ISSN: | 1432-0878 0302-766X |
| Popis: | From a morphological point of view, placozoans are among the most simple free-living animals. This enigmatic phylum is critical for our understanding of the evolution of animals and their cell types. Their millimeter-sized, disc-like bodies consist of only three cell layers that are shaped by roughly seven major cell types. Placozoans lack muscle cells and neurons but are able to move using their ciliated lower surface and take up food in a highly coordinated manner. Intriguingly, the genome of Trichoplax adhaerens, the founding member of the enigmatic phylum, has disclosed a surprising level of genetic complexity. Moreover, recent molecular and functional investigations have uncovered a much larger, so-far hidden cell-type diversity. Here, we have extended the microanatomical characterization of a recently described placozoan species—Hoilungia hongkongensis. In H. hongkongensis, we recognized the established canonical three-layered placozoan body plan but also came across several morphologically distinct and potentially novel cell types, among them novel gland cells and “shiny spheres”-bearing cells at the upper epithelium. Thus, the diversity of cell types in placozoans is indeed higher than anticipated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink