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    Home > Food News > Food Articles > Scientists discover new polychaete annelids 514 million years ago

    Scientists discover new polychaete annelids 514 million years ago

    • Last Update: 2021-03-07
    • Source: Internet
    • Author: User
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    Dannychaeta tucolus restoration map of early Cambrillants in Yunnan Province / Robert Nicholls painting Danny do caterpillar Dannychaeta tucolus Chen Hongxuan in the early Cambrillics of Yunnan Province
    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 an animal branch in the current 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 and researcher of Yunnan Province Paleontical Research Key Laboratory of Yunnan University's Institute of Paleontical Research,
    As a group of species that appeared in the Camsan era life outbreak, link animals (body-sectioned worms) such as slugs, otters, sandworms, etc., play an important role in today's terrestrial and marine ecosystems. 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 camanithal 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 Camblin-era animals we knew before may have been crawling on the bottom of the sea, while the Danny do caterpillars were completely different. Co-lead author Dr Luke Parry, of the University of Oxford in the UK, said:
    the study shows that Danny's caterpillars live a tube- and solid life. 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 outbreak, 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. (Source: China Science Journal) Information on
    relevant papers:
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