科技

【BB娱乐平台】寒武纪就有大龙虾了吗

2021-02-18 04:14

本文摘要:ahugearthropodthatlived 480 millionyearsagousedspinesonitsheadtofilterseawaterandtotraptinyparticlesoffood.thelobsterlikeanity isoneoftheearliestgiantfilter-feedereverdiscovered,scientistsreportedinthejournalnature.4.8亿年前科学家们在《大自然》 (Nature

BB娱乐网官网

BB娱乐平台

ahugearthropodthatlived 480 millionyearsagousedspinesonitsheadtofilterseawaterandtotraptinyparticlesoffood.thelobsterlikeanity isoneoftheearliestgiantfilter-feedereverdiscovered,scientistsreportedinthejournalnature.4.8亿年前科学家们在《大自然》 (Nature )杂志上刊登了这篇文章“itimpliestherewasarichsourceofplanktonatthetime,upon which these things may have fed, 》said Derek Briggs指出,APaleontologistatyaleuniversityandoneofthestudy’s Authors .“当时的浮游生物资源非常丰富,这样的动物以它们为食物。dr.briggsandhiscolleaguesdiscoveredthefossilremainsofthenewspecies, named Aegirocassis benmoulae表示,in Morocco.itbelongstoanextinctfamilyofmarineanimalscalledanomalocaridids, whichfirstappearedduringthecambrianperiod 520 million years ago .布里亚雷格斯和同事们在摩洛哥发现了这种名为“Aegirocassis benmoulae”的新物种化石。属于灭绝的虾科(anomalocaridid )海洋动物,最初经常出现在5亿2千万年前的寒武纪。

aegirocassishaddoubleflapsalongthesideofitsbody, ratherthanthesingleflapsseeninpreviousanomalocarididfossils.thebottomflapsmayhavehelpedaegirocassisswim, whilethetopsetofflapsmayhavebeenusedforstabilization,DR.BriGS SAID.Aegirocassisbenmoulae身体两侧有双鳍,但以前的虾科化石只有单鳍。布里格斯博士说,下鳍可能是用来帮助游泳的,上面有可能是用来保持身体平衡的。thefossilremainsarethree-dimensionalandexceptionallywellpreserved.almostallpreviousanomalocaridfossilswereflat .这些之前的虾“wethinkitisbecausethesethingswereburiedquiterapidlybyastormorothereventontheseafloor,”Dr. Briggs said .“我们指出。

BB娱乐平台


本文关键词:BB娱乐平台,【,娱乐,平台,】,寒武纪,就,有大,龙虾,了,吗

本文来源:BB娱乐平台-www.yaboyule95.icu