👉 A paraspineal (or parapsine) is a type of fossilized vertebrate that was originally part of the phylum Apus, which later evolved into the phylum Arthropoda. These animals were found in the Cambrian period (about 540 to 528 million years ago) during the Early Cretaceous period and are known for their highly developed sensory organs, including eyes, ears, and a complex神经系统。
