Andrzej Wolniewicz

Palaeontologist 🦕 | Triassic marine reptiles 🦎➡️🐬 | Asst Prof at @IPaleoPAN 🇵🇱🇪🇺

[Andrzej Wolniewicz @ASWolniewicz]

New paper out now in @fossil_record! Together with @Feikosaur, @GBindellini, E. Maxwell and C. Dal Sasso, we describe the foetus of the Middle Triassic #ichthyosaur Besanosaurus leptorhynchus from Monte San Giorgio 🇮🇹 with insights into ichthyosaur taxonomy and reproduction! 👇

[Feiko Miedema @Feikosaur]

aby ichthyosaur alert! Here we describe the Besanosaurus foetus in detail. The holotype of Besanosaurus was thought to preserve embryonic material earlier, but here it is in detail. It is a single foetus. lying in tail-first presentation.https://t.co/wA1i8cACIn

[Hesham Sallam @heshamsallam]

A new study in Science Advances, led by Sanaa El-Sayed, describes an extraordinary fossil fish assemblage from Egypt that is 62.2 million years old. https://t.co/cg1vWc4pLx
@SanaaEgypt @Friedman_Lab

[Dr. Joe Moysiuk @CambroJoe]

Soft tissue remains confirm the radiation of crown group bryozoans in the #Cambrian.
https://t.co/WZLG4vAWh5

[Steve Brusatte @SteveBrusatte]

Why were the arms of T. rex so tiny? Literally they were the size of human arms, but on a bus-sized animal. Insane!

Many of us have had ideas over the years, but @KingChar1esIV has a cool new study, and here are my thoughts for @IFLScience

https://t.co/uOrtkMqceI

[みなみさんりく発掘ミュージアム @MinasanMuseum]

https://t.co/bgE7elgfKy

[Natural History Museum @NHM_London]

Do you know what this is?

It’s an enormous fossil of a pincer that’s 16 centimetres long – and it belongs to the world’s largest ever scorpion!

[Hoyaboya @Hoyaboya11]

Tian et al. (2026-06, Royal Society Open Science)
「カンブリア紀の化石のyunnanozoansにおける大動脈およびその他の血管の証拠」
Evidence for aorta and other blood vessels in fossil yunnanozoans from the Cambrian period

[Andrzej Wolniewicz @ASWolniewicz]

#Throwback to #CSVP2026 at the @RoyalTyrrell! 🦈🐊🦖🦣🇨🇦 It was a pleasure to present my research on Late Triassic #ichthyosaurs from British Columbia, reconnect with friends and meet many new colleagues! 😎 Thanks to the organisers for putting together an excellent meeting!

[Beautiful China @PDChinaLife]

Chocolate-made dinosaur fossils offer a visual treat for visitors at a museum in Fuzhou, southeast China's Fujian Province.

[Andrzej Wolniewicz @ASWolniewicz]

@EmuLarge I don't think we can say that, as 1) it's tricky to say exactly how big the foetus was (partially preserved + disarticulated) and 2) it's unclear if presence of a single foetus reflects the typical no of offspring (e.g. litter size range of 1-11 in Stenopterygius; see Discussion)

[RGGS at AMNH @RGGSatAMNH]

Check out this CNN article on RGGS Comp Bio PhD alum Amelia Zietlow and colleagues' Tylosaurus rex publication: Massive marine predator crowned T. rex of the ocean and ‘a true terror of its time' https://t.co/fvhB5ZgaxD

[PaleoGalli @TwitiGalli]

Osteologia craniana e variação ontogenética do dinossauro anquilossaurídeo do Cretáceo Tardio Pinacosaurus grangeri https://t.co/nKImn1TiTi

🎨: Jianhao Ye

[EDGE Central @NatSciChannel]

🚨NEW STUDY DROP🚨

New plesiosaur, Argentinonectes calafatensis, is described from a rather complete skeleton from Upper Cretaceous Patagonia. It helps shed light on the tail anatomy for these plesiosaurs.

🎨: @The_trexdraw (Chubutinectes pic.)

[EDGE Central @NatSciChannel]

🚨NEW STUDY DROP🚨

A new specimen of the Middle Triassic Ichthyosaur, Besanosaurus, has been described with an in-utero fetus revealed through X-ray imaging. The fetus is oriented tail-first, something seen more often in advanced icthyosaurs!

🎨: Fabio Manucci

[Thomas R. Holtz, Jr. 🦖💕 (he/him) @TomHoltzPaleo]

Cranial osteology and ontogenetic variation of the Late Cretaceous ankylosaurid dinosaur Pinacosaurus grangeri https://t.co/jLjI6zLtLv

[Thomas R. Holtz, Jr. 🦖💕 (he/him) @TomHoltzPaleo]

The Earliest Known Purposefully Collected Ichthyosaurian Fossil: A Vertebral Centrum from a Second-century a.d. Roman Pit in Colchester, Essex | Britannia | Cambridge Core - https://t.co/03vPYzmdpz

[Cell Press @CellPressNews]

"The phylogenetic origin of turtles"

Read more in Current Biology: https://t.co/Oe9UEsnPR8

Xavier A. Jenkins & colleagues
@currentbiology

[The PalAss @ThePalAss]

An overview of the oldest & most comprehensive avifauna of the early Eocene British London Clay https://t.co/UQeu98JrhA #FossilFriday #PapersinPalaeontology

[Carlos de Miguel @Carlosdino88]

We have a new paper on the postcranial skeleton of Paludidraco multidentatus! It is bigger, longer and more robust than the holotype! https://t.co/AfOJqnvWiX

[Christian Voiculescu-Holvad @Chalkologist]

#FossilFriday mosasaur news!
It's been a while, but happy to see my MPhil research out @ZoolJLinnSoc! Together w/ my coauthors we examine:
-1st M. lemonnieri (?) record from DK🇩🇰
-Rare BABY mosasaur teeth
-Geochem🧪 data for eco-diversity near the K/Pg
📎: https://t.co/HxRRXOizZS