Takumi Tsutaya
@tsutatsuta.bsky.social
180 followers 130 following 18 posts
Stable isotopes and palaeoproteomics https://sites.google.com/view/tsuta/
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tsutatsuta.bsky.social
I have changed my surname to experience the burden typically imposed on females. And the result was bad: identity confusion, time and economic costs of changing official documents, unwanted disclosure of marital status and family information, and difficulties in fieldwork overseas.
tsutatsuta.bsky.social
Amazed at the molecular investigations of the Harbin cranium. These are important results that further clarify the distribution and morphology of Denisovans.
doi.org/10.1016/j.ce...
doi.org/10.1126/scie...

I have provided my comments for an interview with Nature magazine.
doi.org/10.1038/d415...
First ever skull from ‘Denisovan’ reveals what ancient people looked like
Ancient proteins and calcified dental plaque identify heavy-browed fossil from China as a Denisovan.
www.nature.com
Reposted by Takumi Tsutaya
palaeoprotpalesa.bsky.social
Hello,

Our paper on enamel proteins from Paranthropus robustus has finally been peer reviewed, please have a read here: www.science.org/doi/10.1126/...

Paranthropus robustus has been puzzling scientists since its discovery in 1938 in South Africa, where a high number of fossils have been found.
Enamel proteins reveal biological sex and genetic variability in southern African Paranthropus
Paranthropus robustus is a morphologically well-documented Early Pleistocene hominin species from southern Africa with no genetic evidence reported so far. In this work, we describe the mass spectrome...
doi.org
tsutatsuta.bsky.social
Also, I really appreciate the wonderful colleagues involved in this study, Rikai, Alberto, @zandraselina.bsky.social , Ioannis, Gaudry, Meaghan, Gakuhari, Oota, Tsai, @jespervolsen.bsky.social , Yousuke, Chang, Enrico, and @fridowelker.bsky.social !
tsutatsuta.bsky.social
Finally, this study would not have been possible without the contributions and support of many people. I am deeply grateful to the people of Taiwan for granting us the opportunity to analyze this precious specimen, a treasure of Taiwan. I hope this publication serves as a way to give back.
tsutatsuta.bsky.social
Second, Denisovan morphology becomes clearer. At least male Denisovans had robust jaws and teeth, distinct from Homo sapiens and Neanderthals. As more molecularly identified Denisovan fossils are discovered, a clearer understanding of their morphological traits and evolutionary history is obtained.
An image of a male Denisovan in Taiwan
tsutatsuta.bsky.social
The male Denisovan identity of Penghu provides two important insights. First, it confirms Denisovans inhabited warm and humid environments. This study closes the gap between genomic estimates (hotspots of interbreeding in SE Asia) and fossil occurrence (mostly northern Asia, like Siberia and Tibet).
Coast of Penghu Islands, Taiwan
tsutatsuta.bsky.social
#Paleoproteomics played a key role here. By thoroughly testing extraction strategies using Penghu faunal bones, we obtained a high-quality ancient proteome from Penghu 1 with minimal destruction. We detected multiple Denisovan-related variants and identified a male-specific isoform.
Penghu 1 mandible in hand
tsutatsuta.bsky.social
In 2019, a Denisovan mandible from the Tibetan Plateau was reported, and morphological similarities led to the inference that Penghu 1 may also have originated from the Denisovans.
doi.org/10.1038/s415...
However, an attempt to extract ancient DNA from Penghu 1 has, so far, failed.
A late Middle Pleistocene Denisovan mandible from the Tibetan Plateau - Nature
Fossil evidence indicates that Denisovans occupied the Tibetan Plateau in the Middle Pleistocene epoch and successfully adapted to this high-altitude hypoxic environments long before the regional arri...
doi.org
tsutatsuta.bsky.social
Denisovans, reported in 2010, are an "enigmatic human lineage" in Asia in the Middle to Late Pleistocene. They are defined by genetic data, and their morphology is still mostly unknown. Many skeletal remains are suspected to be Denisovan, but their identity remains unclear without genetic data.
tsutatsuta.bsky.social
The fossil mandible, Penghu 1, has been dredged from the sea bottom of Penghu Channel of Taiwan and was discovered in a private collection by researchers in 2009. The distinct morphological traits of Penghu 1 were reported in 2015, but its phylogenetic position was unknown.
doi.org/10.1038/ncom...
The first archaic Homo from Taiwan - Nature Communications
Growing evidence reveals great diversity of archaic Asian hominins. Here, Chang and colleagues describe a newly discovered archaic Homomandible from Taiwan, which suggests the survival of multiple evo...
doi.org
tsutatsuta.bsky.social
Thank you, Frido! It was a really nice experience for me, and I enjoyed working with wonderful colleagues in Copenhagen. This research would not have been possible without the contributions of everyone involved.
tsutatsuta.bsky.social
Visited GSSP of Chibanian in this winter holiday