Naoto Handa 半田直人
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naotohanda.bsky.social
Naoto Handa 半田直人
@naotohanda.bsky.social
90 followers 87 following 13 posts
Paleontologist studying mammal evolution
哺乳類化石を調べてます
https://sites.google.com/site/nhandaswebsite/english
Posts Replies Media Videos
Reposted by Naoto Handa 半田直人
jzoology.bsky.social
Exploring the complexities of cooperative #breeding: insights from African wild dog packs - #OpenAccess zslpublications.onlinelibrary.wiley.com/doi/10.1111/... #carnivores #Africanwilddog #kinselection @elissazcameron.bsky.social @conservresearch.bsky.social @wileyecology.bsky.social
December 10, 2025 at 3:25 PM
Reposted by Naoto Handa 半田直人
anatrecord.bsky.social
New research traces evolutionary history of European rabbit (Oryctolagus cuniculus) through Pleistocene (~700ka). Analyses of 55 fossil populations reveal how climatic shifts drove changes in size & morphology, shaping biogeography.
Pelletier: anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
November 8, 2025 at 12:00 PM
Reposted by Naoto Handa 半田直人
thepalass.bsky.social
Microstructural & geochemical evidence offers a solution to the cephalopod cameral deposits riddle onlinelibrary.wiley.com/doi/10.1111/... @datadryad.bsky.social
Top: scheme showing the proposed new growth cycle model in an orthoceratoid. Ontogenetic progression of cameral deposits is shown from left to right (towards the apex). Organic sheets are formed when the soft body vacates the chamber, increasing the functional surface area of the siphuncle and guiding the precipitation of cameral deposits (red lines). Middle: Transmitted light (on the left) and cathodoluminescence (on the right in red and purple colours) microscopy images of Trematoceras elegans from the St Cassian Formation, Carnian, Late Triassic; PZO 16538-01, cross-section. Bottom: SEM image of Trematoceras elegans, PZO 16535-02, longitudinal section, showing the circular patterns of a single spherulitic sector, with a well-defined boundary to a neighbouring sector (interpreted as a cameral sheet).
November 9, 2025 at 3:43 PM
Reposted by Naoto Handa 半田直人
palaeo-electronica.bsky.social
Many #macroinvertebrate holotypes of the Santana Group are deposited and ultimately described in foreign institutions. This new study examines the ongoing loss of Brazil’s cultural and scientific heritage and proposes strategies to prevent and mitigate the impact of parachute science.
November 3, 2025 at 9:13 PM
Reposted by Naoto Handa 半田直人
dinopantheon.bsky.social
約2万年前のケブカサイの角を発見、1.6m超は史上最長のサイ角 | ナショナル ジオグラフィック日本版サイト natgeo.nikkeibp.co.jp/atcl/news/25...
約2万年前のケブカサイの角を発見、1.6m超は史上最長のサイ角
ロシア、サハ共和国の永久凍土から、1万9700年前のケブカサイの角が発掘された。長さ165センチはこれまで見つかったサイの角の中で最も長い。
natgeo.nikkeibp.co.jp
November 3, 2025 at 9:35 PM
Reposted by Naoto Handa 半田直人
vertevo.bsky.social
Unusual low-risk/high-gain strategy in small #bats: Short search and pursuit times with high hunting success rates and targeting prey approaching their own body size of 30 g.

Baier et al 2025 @currentbiology.bsky.social Extreme hunting efficiency in a carnivorous bat

doi.org/10.1016/j.cu...
November 4, 2025 at 6:40 AM
Reposted by Naoto Handa 半田直人
pirika-nupuri.bsky.social
この本を久しぶりにひっぱり出してきたけど、夕飯前にページをめくったことを後悔している...
October 27, 2025 at 10:44 AM
Reposted by Naoto Handa 半田直人
anatrecord.bsky.social
New insights into early therizinosaur evolution! Newly described cranial bones of Falcarius utahensis—the oldest known therizinosaur—reveal key transitions in skull form and feeding anatomy.
Freimuth & Zanno: anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
October 27, 2025 at 11:01 AM
Reposted by Naoto Handa 半田直人
anatrecord.bsky.social
🦇 Bat nasal bones (turbinals) reveal how form follows function. Echolocating bats have simpler, plate-like turbinals, while fruit-eating bats show complex, scrolled ones—especially Cynopterus sphinx & Artibeus jamaicensis.
King et al.: anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
October 12, 2025 at 1:02 PM
Reposted by Naoto Handa 半田直人
fr.pensoft.net
Researchers report the first fossil record of frogs and snakes from Taiwan, based on Middle Pleistocene vertebrate assemblage recovered from the Chochen–Tsailiao area.

🔗 doi.org/10.3897/fr.2...
October 1, 2025 at 6:56 AM
Reposted by Naoto Handa 半田直人
natecoevo.nature.com
Mitochondrial DNA from horses at the Middle Pleistocene archaeological site of Schöningen reveals insight into the evolutionary history of horses, and advances techniques for the analysis of ancient DNA retrieved from highly degraded samples 🧪🐴 www.nature.com/articles/s41...
Mitochondrial genomes of Middle Pleistocene horses from the open-air site complex of Schöningen - Nature Ecology & Evolution
Mitochondrial DNA from horses at the Middle Pleistocene archaeological site of Schöningen reveals insight into the evolutionary history of horses and advances techniques for the analysis of ancient DNA retrieved from highly degraded samples.
www.nature.com
October 1, 2025 at 12:49 PM
Reposted by Naoto Handa 半田直人
thepalass.bsky.social
Climatic niche stability & lability in Holarctic non-marine ostracods: implications for Quaternary palaeoclimate reconstruction onlinelibrary.wiley.com/doi/10.1111/...
At the top: a map of the world showing Palaearctic occurrence records for ostracod Isocypris beauchampi with a bioclimate model showing predicted suitable areas for the taxon to inhabit in green. At the bottom: a plot of mean January (horizontal) and July (vertical) air temperatures for Nearctic and Palaearctic occurrence records plotted over the point cloud of all records in four northern hemisphere databases (DOAD, NANODe, NODE adn EANODe). Scale bar on SEM image of Isocypris beauchampi in bottom right corner is 0.2 mm.
September 29, 2025 at 11:15 AM
Reposted by Naoto Handa 半田直人
dinopantheon.bsky.social
高解像度の化石スキャンにより、哺乳類の顎関節の進化の4段階のプロセスが明らかになった
ニュース phys.org/news/2025-09...
論文 www.nature.com/articles/s41...
High-resolution fossil scans reveal four-step process of mammalian jaw joint evolution
During the course of evolution, the mammalian cranio-mandibular secondary joint—formed by the dentary condyle and the squamosal glenoid fossa, which replaced the reptilian articular–quadrate joint—rep...
phys.org
September 24, 2025 at 10:08 PM
Reposted by Naoto Handa 半田直人
ipc7.bsky.social
There will be 29 themed symposia + one general symposium at the upcoming IPC7.

📢 Today we highlight:
✨Cenozoic vertebrates of Africa✨

To participate in this symposium, contact the convener:
🔸Alberto Valenciano — albvalen@ucm.es
🔸Adam Hartstone-Rose — adamhrose@ncsu.edu
September 23, 2025 at 9:20 AM
Reposted by Naoto Handa 半田直人
pirika-nupuri.bsky.social
カナダのクマはぎ。
September 20, 2025 at 1:49 AM
Reposted by Naoto Handa 半田直人
thepalass.bsky.social
The effects of sensitive environmental indicators in interpreting faunas of the past: a case study from the Jurassic of China onlinelibrary.wiley.com/doi/10.1111/...
Grid plot showing different aquatic organisms and environmental conditions (salinity, humidity, water depth, volcanism, water chemistry and temperature) on the vertical axis and different samples on the horizontal axis. At the bottom are co-occurrence networks of the Yanliao fauna showing different salinity levels (high, medium-high, medium-low and low salinity). Red lines indicate positive correlations and blue lines negative correlations.
September 19, 2025 at 4:12 PM
Reposted by Naoto Handa 半田直人
ejrpaleo.bsky.social
Three #Tyrannosaurus skulls of @SUEtheTrex of @FieldMuseum, USNM 555000 of @NMNH, and Tufts Love rex of @burkemuseum. The skull differences in these three T.rex specimens is amazing! #dinosaurs #paleontology #FossilFriday
September 12, 2025 at 5:13 AM
Reposted by Naoto Handa 半田直人
anatrecord.bsky.social
Synchrotron CT of therapsid Moschognathus whaitsi revealed 1st full cranial description, showing evidence of headbutting behavior, “talon & heel” tooth shape & complex sauropod-like tooth replacement
Lafferty et al: anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
Reconstruction by Morgan Farabin
September 12, 2025 at 1:03 PM
Reposted by Naoto Handa 半田直人
paleosoc.bsky.social
Today’s #FossilFriday is an incredible 35,000 year old thorny bamboo from Manipur, India!
These were found by Dr. Bhatia, who researches palaeobotany at the Birbal Sanhi Institute of Palaeosciences to learn about how past environments created today’s ecosystems🎍
#Fossil #Palaeontology #Palaeobotany
September 13, 2025 at 4:07 AM
Reposted by Naoto Handa 半田直人
pdmannion.bsky.social
New paper in which we evaluate how we can use information on past extinction events to better contextualise the ongoing anthropogenic extinction, led by @anthropocenebio.bsky.social (with @bethanyjallen.bsky.social, @inesismartins.bsky.social, & others): onlinelibrary.wiley.com/doi/10.1111/...
September 4, 2025 at 10:27 AM
Reposted by Naoto Handa 半田直人
anatrecord.bsky.social
Bone microstructure holds clues to life history. In springbok, growth marks in limb bones reveal age, stress events & skeletal maturity. New study links ages to histology, showing mid-cortical marks reliably indicate age before maturity
Heck et al anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
August 31, 2025 at 12:00 PM
naotohanda.bsky.social
visited at Genbudo Park (basaltic columnar joints) in Hyogo, and Tottori sand dunes in Tottori Prefecture.
September 1, 2025 at 2:28 PM
Reposted by Naoto Handa 半田直人
manonhullot.bsky.social
2 offres d’emploi au Muséum d’histoire naturelle de Genève www.museum-geneve.ch 🇨🇭 :

- Chargé ou chargée de projets d’exposition à 100%
www.geneve.ch/administrati...

- Médiateur ou médiatrice scientifique à 80%
www.geneve.ch/administrati...

Deadline 12.09.2025
www.museum-geneve.ch
September 1, 2025 at 7:58 AM
Reposted by Naoto Handa 半田直人
biorxiv-paleo.bsky.social
New insights into the extinction and recovery of marine vertebrates across the Permian-Triassic mass extinction event in the Dolomites, Southern Alps, Italy https://www.biorxiv.org/content/10.1101/2025.08.23.671916v1
August 28, 2025 at 3:00 AM
Reposted by Naoto Handa 半田直人
martapina.bsky.social
#Conference
Tentative dates for the Tenth Biennial Conference of the Eastern Association for Palaeoanthropology and Palaeontology #EAAPP2026 are out and it will be held in 🇰🇪Kenya👇🏿👇🏿👇🏿
26th-30th July 2026

eaappinfo.wordpress.com/2026-2/
2026
THE EASTERN AFRICA ASSOCIATION FOR PALAEOANTHROPOLOGY AND PALAEONTOLOGY (EAAPP) Tenth Biennial Conference Kenya 26th – 30th JULY 2026 Tentative Schedule: 26th July: Conference registration an…
eaappinfo.wordpress.com
August 16, 2025 at 11:11 AM