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　　三九養(yǎng)生堂記者 鄧肯·蓋伊 報道

精彩|　　徐??(xu)光??(guang)輝??(hui)指??(zhi)出??(chu)??，這??(zhe)表??(biao)明??(ming)圓??(yuan)尾??(wei)滇??(dian)東??(dong)魚??(yu)比??(bi)此?(ci)前??(qian)發(fā)??(fa)現(xiàn)??(xian)的?(de)拱??(gong)魚??(yu)目??(mu)及??(ji)歐??(ou)美??(mei)所??(suo)有?(you)鉸??(jiao)齒??(chi)魚??(yu)類??(lei)都??(dou)要?(yao)原??(yuan)始??(shi)??，代??(dai)表??(biao)了??(le)現(xiàn)??(xian)生?(sheng)雀?(que)鱔??(shan)魚??(yu)類??(lei)這??(zhe)一??(yi)演??(yan)化?(hua)支??(zhi)系??(xi)最??(zui)原??(yuan)始??(shi)的??(de)祖??(zu)先??(xian)類??(lei)型?(xing)??。??“通??(tong)俗??(su)地??(di)說??(shuo)??，中??(zhong)國??(guo)科??(ke)學??(xue)院??(yuan)古??(gu)脊??(ji)椎??(zhui)所??(suo)逮??(dai)到??(dao)天??(tian)下??(xia)第??(di)一??(yi)條??(tiao)雀??(que)鱔??(shan)魚??(yu)類??(lei)”???！　”??(ben)次??(ci)研??(yan)究??(jiu)發(fā)??(fa)現(xiàn)??(xian)的??(de)圓??(yuan)尾??(wei)滇??(dian)東??(dong)魚??(yu)化??(hua)石??(shi)共??(gong)有??(you)13塊??(kuai)?，它??(ta)是??(shi)一??(yi)種??(zhong)長??(chang)梭??(suo)形?(xing)小?(xiao)魚??(yu)?，次??(ci)圓??(yuan)形??(xing)尾??(wei)?，全??(quan)身??(shen)布??(bu)滿??(man)烏??(wu)黑??(hei)發(fā)??(fa)亮??(liang)的??(de)方?(fang)鱗??(lin)?，最??(zui)大??(da)個??(ge)體?(ti)全??(quan)長??(chang)只?(zhi)有??(you)5厘??(li)米??(mi)?，代??(dai)表??(biao)了??(le)羅??(luo)平??(ping)生??(sheng)物??(wu)群??(qun)中??(zhong)體??(ti)型??(xing)最??(zui)小??(xiao)的??(de)鉸??(jiao)齒??(chi)魚??(yu)類??(lei)??。??年??(nian)代??(dai)地??(di)層??(ceng)學??(xue)研??(yan)究??(jiu)確??(que)定??(ding)羅??(luo)平??(ping)生??(sheng)物??(wu)群??(qun)年??(nian)代??(dai)距??(ju)今??(jin)約??(yue)2.44億??(yi)年??(nian)?，因??(yin)此??(ci)?，圓??(yuan)尾??(wei)滇??(dian)東??(dong)魚??(yu)也??(ye)代??(dai)表?(biao)了??(le)世??(shi)界??(jie)上??(shang)最??(zui)古??(gu)老??(lao)的??(de)鉸??(jiao)齒??(chi)魚??(yu)類??(lei)之??(zhi)一??(yi)??。

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