Scientists discover new polychaete annelids 514 million years ago

danny caterpillar Danychaeta tucolus restoration map / Robert Nicholls painting in the early CamphanDannychaeta tucolus Chen Hong, an early hairy animal in the Cambrill era in Yunnan Province
On June 11, Nature published the latest collaboration research results from the Yunnan Paleontical Research Key Laboratory team at the Institute of Paleont biology of Yunnan University, the University of Oxford in the United Kingdom, the University of Exeter and the University of Bristol. The team found a new, 514 million-year-old hairy animal in the Cambic formation rich in soft somatic stones in eastern Yunnan province, the earliest known fossil record of the animal branch of the living link.
"This is the earliest fossil evidence of animals in the solid link, and also the first time that animal branch in the current link appears in the fossil record. Co-author of the paper, Yunnan University Institute of Paleontical Research, Yunnan Province Paleontical Research Key Laboratory Researcher
as a group in the Campell life outbreak, link animals (body-section worms) such as radon, otters, sandworms, etc., in today's land and marine ecosystems play an important role. Among them, hairy animals are the most abundant species and the oldest evolutionary group in the link animals. But fossil records of animals in the early Camsoon formations were rare, leading scientists to lack strong fossil evidence to study their origins and early evolution.
team named the camanile's new genus "Dannychaeta tucolus" in honor of Danny Eibye-Jacobsen, a renowned Danish animal expert. The animal has a typical iron-like head and a pair of slender tentacles, belonging to the long-handed sandworms in the lively hairy animals. This is the earliest fossil record of the animal branch of the living link, indicating that the Danny do caterpillar and the living animal evolved from the same recent common ancestor, collectively known as the link animal crown group.
" live animals have a variety of life patterns in the modern ocean, including solid filter eaters or ambush predators. The Cambic animals we knew before may have been crawling on the bottom of the sea, but Danny's caterpillars were completely different. Co-lead author Dr Luke Parry, of the University of Oxford in the UK, said:
study shows that Danny's caterpillars are tube-solid. Many of the live hairy animals are tubed or fixed caves to avoid predators or hide themselves during predation, often referred to as clinging animals.
Previously, modern biologists, through systematic developmental genomics, believed that solid animals should represent an older branch of the animal evolutionary tree, but until now, solid lifestyles have not been found in early link fossils.
researchers say the Cammatic period was a key period in the early biodiversity explosion, and the discovery of the Danidor caterpillar shows that the Camdani outbreak was not only an important evolutionary event for biodiversity, but also for the dramatic increase in biodiversity.
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