Planetetherium
genus of mammals
Planetetherium is an extinct genus of herbivorous plagiomenid mammal endemic to North America during the Paleogene living from 56.8 to 55.4 mya, existing for approximately 1.4 million years.
Fossils have been discovered in strata formed from ancient cypress forests, suggesting that this was the animal's preferred habitat.
Morphology
Plantetherium is estimated to reach around 25 centimetres (10 in) in length, and its known materials closely resembled that of its modern relatives. Its teeth already included the comb-like structure distinctive to modern colugos. Since no postcranial materials have been described for any plagiomenid, there is no direct evidence that Planetetherium had the membrane of skin that allows modern colugos to glide.
“Planetetherium” enters the record as genus of mammals. Crown Archives preserves that source wording while asking what Planetetherium, genus and mammals can confirm, complicate or overturn.
Why this record matters
“Planetetherium” is worth following because a concise public description often conceals a longer documentary argument. Here, Planetetherium, genus and mammals provides the most credible route into that argument.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Aug 9, 2026. The linked authority identifier is Q675829. None of the 0 selected statements returned an explicit reference.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Planetetherium”, its source revision and the description used here.
- Expand the search: follow Planetetherium primary sources, Planetetherium archive and Planetetherium research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Planetetherium”?
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- Which observation, specimen, dataset or publication supports the account?
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This entry incorporates text from “Planetetherium” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.