Metaplasia ✝
Description | Metaplasia (Greek: "change in form") is the transformation of one differentiated cell type to another differentiated cell type. The change from one type of cell to another may be part of a normal maturation process, or caused by some sort of abnormal stimulus. In simplistic terms, it is as if the original cells are not robust enough to withstand their environment, so they transform into another cell type better suited to their environment. If the stimulus causing metaplasia is removed or ceases, tissues return to their normal pattern of differentiation. Metaplasia is not synonymous with dysplasia, and is not considered to be an actual cancer. It is also contrasted with heteroplasia, which is the spontaneous abnormal growth of cytologic and histologic elements. Today, metaplastic changes are usually considered to be an early phase of carcinogenesis, specifically for those with a history of cancers or who are known to be susceptible to carcinogenic changes.Metaplastic change is often viewed as a premalignant condition that requires immediate intervention, either surgical or medical, because metaplasia is associated with cancer. From Wikipedia article at https://en.wikipedia.org/wiki/Metaplasia, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Source Data |
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Rank | genus | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Taxonomy (GBIF,PBDB) | Life : Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Ambocoeliidae : Metaplasia | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Classification (PBDB,GBIF) |
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Scientific Name | Metaplasia Hall & Clarke, 1894 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Name Published In | Paleont. N. York, 8 (2) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Opinions (PBDB) |
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Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Taxon Size (PBDB) | 2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
First Recorded Appearance | 433 - 427 Ma Silurian | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Last Recorded Appearance | 393 - 388 Ma Devonian | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Motility | stationary, attached (based on Ambocoelioidea) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Vision | blind (based on Rhynchonellata) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Diet | suspension feeder (based on Ambocoelioidea) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Ecospace Comments | BODY SIZE: Data from Williams et al. (2006). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Taphonomy | low Mg calcite (based on Brachiopoda) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Primary Reference (PBDB) | J. J. Sepkoski, Jr. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Wikipedia | https://en.wikipedia.org/wiki/Metaplasia |
Fossil Distribution
Subtaxa
Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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Metaplasia lenzi species | accepted (GBIF) | No associated record in PBDB | |||
Metaplasia paucicostata ✝ species | accepted (GBIF) listed (PBDB) | 3 | 409 Ma Early/Lower Devonian | 408 Ma Early/Lower Devonian | |
Metaplasia uniplicata species | accepted (GBIF) | No associated record in PBDB |
Synonymy List
Year | Name and Author |
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2002 | Metaplasia Sepkoski, Jr. |
2006 | Metaplasia Williams et al. p. 1736 |