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Scientists Unveil Mystery Surrounding 500 Million-Year-Old Critter Without Anus_我的网站

A |     Researchers from China and the UK have solved the mystery surrounding Saccorhytus coronaries – a millimeter-long spiny creature that was found in 2017 and believed to have inhabited oceans 500 million years ago. The veil of mystery over the critter persisted for years, as the scientists could not locate the creature’s anus. Turns out – they should not have even tried.,The critter was originally determined to be a member of a deuterostomes group of animals - the ancestors to the modern vertebrates (including humans). However, scientists' latest research suggests that it actually belongs to another group called ecdysozoans – the predecessors of the modern spiders and various insects. As it turned out, the whole mishap happened over the creature's anus – or rather lack thereof.,Ecdysozoans normally have an anus and hence the critter was initially ruled not to belong to them. But, upon closer discovery using x-rays, scientists saw it resembles ecdysozoans internally more than the ancestors of the vertebrates.,Like them, Saccorhytus has a large mouth and also features tiny holes around it that served as bases for spines that kept the critter anchored in one place. Those holes also served as a source of confusion as they were originally believed to be gills – another mark of the proto-vertebrates.,'Ugliest I've Ever Seen': Fisherman Shares Pic of Mysterious Creature He Found in Australia29 June, 13:17 GMT,As to Saccorhytus' absence of anus, scientists are yet to find out what happened to it. One theory suggests that there was an even earlier representative of ecdysozoans that has not been discovered, but did not have an anus.,Another theory goes that Saccorhytus did not actually need one.,"It could be that it lost it during its own evolution - perhaps it didn't need one because it could just sit in one spot with one opening for everything," Emily Carlisle, one of the researchers, said.。    느티마을 4단지 리모델링                   경기 성남시 분당구 정자동 느티마을 4단지를 리모델링해 조성하는 ‘더샵 분당하이스트’(조감도)가 다음달 분양에 나선다. 신분당선과 수인분당선을 모두 이용할 수 있는 정자역 더블 역세권 단지다.포스코이앤씨가 시공을 맡은 이 단지는 지하 4층~지상 최고 26층, 17개 동, 1149가구(전용면적 66~84㎡) 규모다. 이 가운데 143가구가 일반분양 물량이다. 전용면적별 일반분양 가구 수는 66㎡ 52가구, 74㎡ 19가구, 84㎡ 72가구다.분당신도시 내 교통과 생활 인프라를 이용하기 편하다. 신분당선·수인분당선 환승역인 정자역이 도보 약 10분 거리에 있다. 신분당선을 이용하면 판교역까지는 약 2분, 강남역까지는 15분대 이동이 가능하다. 신기초·정자중·한솔고와 정자동 학원가도 가깝다.직주근접 여건도 좋다. 정자동 일대에는 네이버, SK하이닉스, HD현대, 두산, KT 등 주요 기업의 업무시설이 밀집해 있다. 판교테크노밸리와 연계된 업무 벨트를 형성하고 있다. 분당서울대병원과 현대백화점 판교점 등도 가깝다.。

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Published on:13:02:41