Originalpublikation: www.cell.com/fulltext/S09...
Parallel Emergence of True Handedness in the Evolution of Marsupials and Placentals
Strongly pronounced handedness is traditionally considered to be a distinctive human
trait. Giljov et al. show forelimb preferences in kangaroos, comparable in strength
with human handedness, but oppo...
www.cell.com
May 23, 2025 at 12:13 PM
Originalpublikation: www.cell.com/fulltext/S09...
Not monotremes, not marsupials, not placentals, but a secret fourth thing
May 24, 2025 at 7:58 PM
Not monotremes, not marsupials, not placentals, but a secret fourth thing
#2025SVP @stevebrusatte.bsky.social: Early results suggest no unambiguous known Cretaceous placentals, many “archaic” placentals allied with Laurasiatheria. However, much more work to do.
November 15, 2025 at 12:01 PM
#2025SVP @stevebrusatte.bsky.social: Early results suggest no unambiguous known Cretaceous placentals, many “archaic” placentals allied with Laurasiatheria. However, much more work to do.
I had a passing curiosity and realized that the fundamental difference between us and kangaroos is older than the first tyrannosaur
March 16, 2025 at 5:09 PM
I had a passing curiosity and realized that the fundamental difference between us and kangaroos is older than the first tyrannosaur
I think the only way to nail future depictions of terror birds living with placentals is to simply...frame them as fully naturalized members of the ecosystem. Less "out of place dinosaur making its last stand against mammals", more "It's Tom again, run!".
May 5, 2026 at 10:29 PM
I think the only way to nail future depictions of terror birds living with placentals is to simply...frame them as fully naturalized members of the ecosystem. Less "out of place dinosaur making its last stand against mammals", more "It's Tom again, run!".
All mammals (placentals) except marsupials and monotremes I assume though harder to see in some than others
March 15, 2026 at 3:59 AM
All mammals (placentals) except marsupials and monotremes I assume though harder to see in some than others
#2025SVP @stevebrusatte.bsky.social: Over 200 species of “archaic” placentals known from the Paleocene–Eocene, but their phylogenetic affinities are poorly understood.
November 15, 2025 at 11:52 AM
#2025SVP @stevebrusatte.bsky.social: Over 200 species of “archaic” placentals known from the Paleocene–Eocene, but their phylogenetic affinities are poorly understood.
Dingo ( Canis lupus dingo )
#sunshinecoastsnakeremovals.com #Animals #Mammals #MammalPhotography #Mammalia #Placentals #Placentalia #PlacentalCarnivores #Carnivora #Dogs,FoxesAndDingoes #Canidae #Dingo #Canislupusdingo
#sunshinecoastsnakeremovals.com #Animals #Mammals #MammalPhotography #Mammalia #Placentals #Placentalia #PlacentalCarnivores #Carnivora #Dogs,FoxesAndDingoes #Canidae #Dingo #Canislupusdingo
January 7, 2025 at 11:18 AM
#2025SVP Beck: Reexamination of branch lengths suggests rapid population expansion at the base of all the most contentious nodes within placentals.
November 15, 2025 at 12:08 PM
#2025SVP Beck: Reexamination of branch lengths suggests rapid population expansion at the base of all the most contentious nodes within placentals.
You cannot group "ant bears" and actual ursids in a monophyletic clade that you then call "bears" because such a clade would include all sorts of mammals with varying degrees of relation to either bears or anteaters. That clade would just be "placentals".
April 12, 2026 at 2:26 AM
You cannot group "ant bears" and actual ursids in a monophyletic clade that you then call "bears" because such a clade would include all sorts of mammals with varying degrees of relation to either bears or anteaters. That clade would just be "placentals".
Dromedary Camel ( Camelus dromedarius )
Wild animal in Australia
#sunshinecoastsnakeremovals.com #Animals #Mammals #MammalPhotography #Mammalia #Placentals #Placentalia #Ungulates #Artiodactyla #Camels #Camelidae #DromedaryCamel #Camelusdromedarius
Wild animal in Australia
#sunshinecoastsnakeremovals.com #Animals #Mammals #MammalPhotography #Mammalia #Placentals #Placentalia #Ungulates #Artiodactyla #Camels #Camelidae #DromedaryCamel #Camelusdromedarius
January 12, 2025 at 3:33 AM
Dromedary Camel ( Camelus dromedarius )
Wild animal in Australia
#sunshinecoastsnakeremovals.com #Animals #Mammals #MammalPhotography #Mammalia #Placentals #Placentalia #Ungulates #Artiodactyla #Camels #Camelidae #DromedaryCamel #Camelusdromedarius
Wild animal in Australia
#sunshinecoastsnakeremovals.com #Animals #Mammals #MammalPhotography #Mammalia #Placentals #Placentalia #Ungulates #Artiodactyla #Camels #Camelidae #DromedaryCamel #Camelusdromedarius
Giant ground sloths were xenarthrans ("weird joints"), mammals with lower body temperature than most placentals, which is why the males don't bother to descend their testicles. All xenarthrans cope with the fact that they can't outrun other mammals. 1/2 #evolution
December 17, 2025 at 10:00 PM
Giant ground sloths were xenarthrans ("weird joints"), mammals with lower body temperature than most placentals, which is why the males don't bother to descend their testicles. All xenarthrans cope with the fact that they can't outrun other mammals. 1/2 #evolution
They were consenting placentals.🐪
August 29, 2026 at 11:39 PM
They were consenting placentals.🐪
Marsupials and placentals. They're all testicles.
August 16, 2024 at 7:15 AM
Marsupials and placentals. They're all testicles.
Goat (Capra aegagris hircus)
2.00
NIKON CORPORATION (NIKON D100)
10/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
2.00
NIKON CORPORATION (NIKON D100)
10/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
January 16, 2026 at 9:02 PM
Goat (Capra aegagris hircus)
2.00
NIKON CORPORATION (NIKON D100)
10/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
2.00
NIKON CORPORATION (NIKON D100)
10/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
For #FossilFriday take a look at the palate and pterygoid crests of the Notoungulata (Mammalia), the richest order of South American endemic placentals by Billet (2011).
Read the full study here: doi.org/10.1080/1477...
#PaleoSky #systematics #skull #Toxodontia #Typotheria #Pyrotheria #anatomy
Read the full study here: doi.org/10.1080/1477...
#PaleoSky #systematics #skull #Toxodontia #Typotheria #Pyrotheria #anatomy
September 4, 2026 at 1:28 PM
For #FossilFriday take a look at the palate and pterygoid crests of the Notoungulata (Mammalia), the richest order of South American endemic placentals by Billet (2011).
Read the full study here: doi.org/10.1080/1477...
#PaleoSky #systematics #skull #Toxodontia #Typotheria #Pyrotheria #anatomy
Read the full study here: doi.org/10.1080/1477...
#PaleoSky #systematics #skull #Toxodontia #Typotheria #Pyrotheria #anatomy
Totally! True placentals are what, a mid-Cretaceous development? We’re all close cousins
February 26, 2026 at 1:55 AM
Totally! True placentals are what, a mid-Cretaceous development? We’re all close cousins
A New Age of Reptiles: Bristly Surf Shrew
In the New Age of Reptiles, placentals are just one among many lineages of eutherians. Surf Shrews, initially misidentified as eulipotyphlans, are members of a large clade of mostly invertivorous mammals common in the Northern Hemisphere. (1/7)
In the New Age of Reptiles, placentals are just one among many lineages of eutherians. Surf Shrews, initially misidentified as eulipotyphlans, are members of a large clade of mostly invertivorous mammals common in the Northern Hemisphere. (1/7)
July 4, 2026 at 12:39 PM
A New Age of Reptiles: Bristly Surf Shrew
In the New Age of Reptiles, placentals are just one among many lineages of eutherians. Surf Shrews, initially misidentified as eulipotyphlans, are members of a large clade of mostly invertivorous mammals common in the Northern Hemisphere. (1/7)
In the New Age of Reptiles, placentals are just one among many lineages of eutherians. Surf Shrews, initially misidentified as eulipotyphlans, are members of a large clade of mostly invertivorous mammals common in the Northern Hemisphere. (1/7)
Branigan et al. (2026-08 preprint, bioRxiv)
「クラウン有胎盤類の急速な放散のモデル化」
Modelling a rapid radiation of crown-group placentals
doi.org/10.64898/202...
「クラウン有胎盤類の急速な放散のモデル化」
Modelling a rapid radiation of crown-group placentals
doi.org/10.64898/202...
August 23, 2026 at 8:05 AM
Branigan et al. (2026-08 preprint, bioRxiv)
「クラウン有胎盤類の急速な放散のモデル化」
Modelling a rapid radiation of crown-group placentals
doi.org/10.64898/202...
「クラウン有胎盤類の急速な放散のモデル化」
Modelling a rapid radiation of crown-group placentals
doi.org/10.64898/202...
Our new study shows how unlike other living predatory mammals the thylacine was, skull-wise: huge heads, altirostral, long & flared snouts, massive infraorbital foramina. Key point: Don't treat marsupials like copies of European placentals. @dsrovinsky.bsky.social
Skull morphology of the extinct Tasmanian tiger suggests unique biting style
Nature Communications - The recently extinct thylacine was Australia’s largest marsupial predator and famously likened to dog-family carnivorans such as wolves. However, here the authors show...
www.nature.com
August 31, 2026 at 11:32 AM
Our new study shows how unlike other living predatory mammals the thylacine was, skull-wise: huge heads, altirostral, long & flared snouts, massive infraorbital foramina. Key point: Don't treat marsupials like copies of European placentals. @dsrovinsky.bsky.social
Yes but they are not placentals, they are monotremes and lay eggs
February 15, 2024 at 8:19 PM
Yes but they are not placentals, they are monotremes and lay eggs
Goat (Capra aegagris hircus)
NIKON CORPORATION (NIKON D100)
09/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
NIKON CORPORATION (NIKON D100)
09/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
March 18, 2025 at 4:39 AM
Goat (Capra aegagris hircus)
NIKON CORPORATION (NIKON D100)
09/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
NIKON CORPORATION (NIKON D100)
09/Apr/2009
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#Ungulates
#Artiodactyla
#ClovenHoofedRuminants
#Bovidae
#Goat
#CapraAegagrisHircus
Dingo (Canis lupus dingo)
2.10
NIKON CORPORATION (NIKON D610)
29/Jun/2016
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#PlacentalCarnivores
#Carnivora
#Canidae
#Dingo
#CanisLupusDingo
2.10
NIKON CORPORATION (NIKON D610)
29/Jun/2016
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#PlacentalCarnivores
#Carnivora
#Canidae
#Dingo
#CanisLupusDingo
November 18, 2025 at 11:57 AM
Dingo (Canis lupus dingo)
2.10
NIKON CORPORATION (NIKON D610)
29/Jun/2016
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#PlacentalCarnivores
#Carnivora
#Canidae
#Dingo
#CanisLupusDingo
2.10
NIKON CORPORATION (NIKON D610)
29/Jun/2016
#Animals
#Mammals
#Mammalia
#Placentals
#Placentalia
#PlacentalCarnivores
#Carnivora
#Canidae
#Dingo
#CanisLupusDingo