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Clupeomorpha fish are divided into two categories: Clupeoformes (such as sardines and Yangtze swordfish, etc.) and the extinct Ellimmichthyiformes. Eram herrings, commonly known as double armored herrings, were first recorded in the Early Cretaceous and continued into the Oligocene (Oligocene...
Among the elephantoids, the main group of proboscis, the development of a pair of huge upper incisors (ivory) has become a distinctive feature of this group. This structure is often used as a feeding tool for individuals and as a weapon for males to compete for mating rights. Pr...
Early birds were still very poor in number and variety, and the chance of being turned into fossils was very small. For example, only six skeleton fossils and one feather specimen of the late Jurassic Archeopteryx fossils have been discovered in the past 140 years from 1861 to the present....
The leaves of modern ferns all look like sheep's teeth, so the earliest scientists who studied them called them "ferns". In the development of the earth's natural history, these "ferns" were actually the earliest higher plants, and they had begun to appear on land in the late Silurian period....
In the early Eocene, a small animal called Paleoartiodactyl differentiated from the anklets. In addition to having a proximal pulley similar to that of perissodactyls, its talus also had a pulley-like distal end. It's a plane. It is this double-trochlear talus that laid the foundation for a p...
1. Archaeopteryx specimens, gradient, evolution from dragon to bird As more and more feathered dinosaurs and primitive bird fossils are discovered, scientists have found that there are more and more similarities between the two, such as body structure (size, bone healing...
Radiolarians and foraminifera are both protozoa, and they belong to the phylum Protozoa of Sarcopodia. In addition to Sarcopoda, protozoa include Flagellates, Ciliates, and Sporozoa. Protozoa are the lowest animals in the animal kingdom. Their bodies are only composed of a single cell. The i...
Recently, Nature Ecology & Evolution, a subsidiary journal of Nature magazine, published a study independently completed by the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences on the independent evolution of the skull and body of early birds. Li Z...
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