Date:

Hundreds of fossilized eggs sheds light on pterosaur development

An invaluable collection of more than 200 eggs is providing new insights into the development and nesting habits of pterosaurs.

To date, only a small handful of pterosaur eggs with a well-preserved 3-D structure and embryo inside have been found and analyzed – three eggs from Argentina and five from China. This sparse sample size was dramatically increased upon the discovery of 215 eggs of the pterosaurs species Hamipterus tianshanensis from a Lower Cretaceous site in China.

- Advertisement -

Xiaolin Wang et al. used computed tomography scanning to peer inside the eggs, 16 of which contain embryonic remains of varying intactness. The most complete embryo contains a partial wing and cranial bones, including a complete lower jaw.

The samples of thigh bones that remain intact are well-developed, suggesting that the species benefited from functional hind legs shortly after hatching. However, the structure supporting the pectoral muscle appears to be underdeveloped during the embryonic stage, suggesting that newborns were likely not able to fly.

Therefore, the authors propose that newborns likely needed some parental care. Based on growth marks, the team estimates one of the individuals to be at least 2 years old and still growing at the time of its death, supporting the growing body of evidence that pterosaurs had long incubation periods.

Lastly, the fact that a single collection of embryos exhibits a range of developmental stages hints that pterosaurs participated in colonial nesting behavior, the authors say. Denis Deeming discusses these findings in a related Perspective.

- Advertisement -

AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE

Header Image CREDIT Alexander Kellner (Museu Nacional/UFRJ)

- Advertisement -

Stay Updated: Follow us on iOS, Android, Google News, Facebook, Instagram, Twitter, Threads, TikTok, LinkedIn, and our newsletter

spot_img
Mark Milligan
Mark Milligan
Mark Milligan is a multi-award-winning journalist and the Managing Editor at HeritageDaily. His background is in archaeology and computer science, having written over 8,000 articles across several online publications. Mark is a member of the Association of British Science Writers (ABSW), the World Federation of Science Journalists, and in 2023 was the recipient of the British Citizen Award for Education, the BCA Medal of Honour, and the UK Prime Minister's Points of Light Award.
spot_img
spot_img

Mobile Application

spot_img

Related Articles

Gravestone depicting 13th century knight unearthed in central Gdańsk

Archaeologists from ArcheoScan have unearthed a rare gravestone depicting a medieval knight during excavations in the centre of Gdańsk, Poland.

Angler unexpectedly fishes out a mysterious medieval sword

An angler fishing in the Vistula River in Warsaw has made an unexpected discovery, a medieval sword dating back hundreds of years.

Archaeologists uncover elite Hellenistic residence in North Macedonia

Excavations by the Museum of Kumanovo near the village of Mlado Nagoričane in the municipality of Staro Nagoričane have uncovered a Hellenistic-era residence dating to the 4th century BC.

Cache of Roman footwear unearthed at Magna Roman Fort

Magna, also known as Carvoran, is a Roman fort situated at the edge of the Whin Sill in Northumberland, England.

Ancient mortuary cave found hidden within desert mountains

Archaeologists from the National Institute of Anthropology and History (INAH) have discovered a pre-Hispanic mortuary cave within the Ocampo Natural Protected Area (ANP) in Coahuila, Mexico.

Preserved shipwreck contains 2,000-year-old ceramic treasures

A recently discovered shipwreck off the coast of Adrasan, Turkey, has yielded a collection of ceramic treasures dating to the Late Hellenistic–Early Roman period.

Ancient boomerang found in Polish cave stuns scientists

A study of a Palaeolithic boomerang found in Poland's Obłazowa Cave has been dated to 42,000 years ago, making the discovery the oldest example in Europe and potentially the world.

Women ruled over oldest known city

A groundbreaking study published in the journal Science has revealed that women played the dominant role at Çatalhöyük.