On 8/31/22 5:32 PM, erik simpson wrote:unfortunately paywalled)
https://www.theguardian.com/science/2022/aug/31/earliest-example-of-placental-mammal-fossil-discovered
The title says it all, but the article the story is about is
https://www.nature.com/articles/s41586-022-05150-w?utm_medium=affiliate&utm_source=commission_junction&utm_campaign=CONR_PF018_ECOM_GL_PHSS_ALWYS_DEEPLINK&utm_content=textlink&utm_term=PID100052172&CJEVENT=e2c04ed3298a11ed804f00ef0a1c0e13 (
The Nature article is concerned with the evidence for very rapid growth rate
in Pantolambda bathmodon, one of the largest early (~62 MYA) post-Cretaceous mammals.
Earlier mammals are of course known, but placentalism (or what degree of placentalism) still must be inferred indirectly."Placental" can mean either of two things: 1) having a chorio-allantoic placenta of the sort possessed by modern placental mammals or 2)
belonging to Placentalia, the crown-group of Eutheria. I think the
article may mean the latter.
https://www.theguardian.com/science/2022/aug/31/earliest-example-of-placental-mammal-fossil-discoveredunfortunately paywalled)
The title says it all, but the article the story is about is
https://www.nature.com/articles/s41586-022-05150-w?utm_medium=affiliate&utm_source=commission_junction&utm_campaign=CONR_PF018_ECOM_GL_PHSS_ALWYS_DEEPLINK&utm_content=textlink&utm_term=PID100052172&CJEVENT=e2c04ed3298a11ed804f00ef0a1c0e13 (
The Nature article is concerned with the evidence for very rapid growth rate in Pantolambda bathmodon, one of the largest early (~62 MYA) post-Cretaceous mammals.
Earlier mammals are of course known, but placentalism (or what degree of placentalism) still must be inferred indirectly.
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