Ilmuwan Ungkap Bentuk Telur Dinosaurus Tidak Seperti yang Kita Bayangkan

Scientists Reveal the Shape of Dinosaur Eggs Unlike What We Imagine

Researchers from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) at the Chinese Academy of Sciences (CAS) have discovered the first dinosaur eggs with rough shells, which represents a major change in egg morphology during the early evolution of theropod dinosaurs. Here is the interesting story behind the unexpected discovery of dinosaur eggs!

A research published in the National Science Review reported the discovery of a sauropodomorph dinosaur specimen named Qianlong Shouhu, found in early Jurassic in Guizhou, China.

Source: Phys.org

Ilmuwan Ungkap Bentuk Telur Dinosaurus Tidak Seperti yang Kita Bayangkan

Qianlong Shouhu is a type of basal sauropodomorph dinosaur that has a medium size, weighing about 1 ton and measuring around 6 meters in length.

Qianlong translates as "Guizhou dragon," while shouhu means "guardian," referring to the preservation of the fossilized adult skeleton alongside the fossilized eggs containing embryos. This specimen includes three adult skeletons and five egg nests. This discovery may be the earliest fossil record of the relationship between adult dinosaurs and their nests.

The discovery of embryos reveals certain differences from adult dinosaurs, such as longer skulls, more upright anterior snout boundaries, and fewer teeth.

Source: Phys.org

Penemuan embrio mengungkapkan perbedaan tertentu dari dinosaurus dewasa, seperti tengkorak yang lebih panjang, batas anterior moncong yang lebih tegak, dan jumlah gigi yang lebih sedikit.

Characteristics - Characteristics of the Qianlong Shouhu Dinosaur Species.

The translation of the given 'Bahasa' text to 'English' while preserving any HTML tags is: "The analysis of allometric body part ratios between adult and Qianlong embryo specimens shows that adult Qianlongs have the ability to walk on their hind legs, while embryos likely move with all four legs."

The following 'Bahasa' text translated to 'English' while preserving any HTML tags: "The characteristics of taphonomy and sediment layers indicate that Qianlong applied colonial nesting behavior in its reproductive process, similar to other basal sauropodomorphs, including Massospondylus and Mussaurus. According to microstructure analysis conducted with various techniques, Qianlong eggs have a microstructure similar to other Cretaceous dinosaur egg fossils. These eggs may consist of two layers, namely the continuous layer and the mammillary layer, and have a fully developed eggshell unit."

The calcium layer on Qianlong eggs is thinner than that of hard-shelled eggs, but much thicker than that of soft-shelled eggs.

Source: Phys.org

The translation of the given text from Bahasa to English while preserving any HTML tags is: "Comparison of eggshell fragments from various types of eggs also reveals that the surface structure of Qianlong eggshell has small fragments, similar to rough eggshells."

This research verifies that the thickness of eggshells tends to decrease from archosaurs to Saurischia, with a noticeable increase in the early evolution stages of theropods and sauropodomorphs. These findings support the idea that the first dinosaur eggs likely had rough shells, relatively small size, and an elliptical shape.

Source: Phys.org

Most likely, the rough eggshell may be a shared ancestral feature for Avemetatarsalia, Archosauria, and Testudines.

Source: Phys.org

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