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　　三九養(yǎng)生堂記者 鄧肯·蓋伊 報(bào)道

精彩|　　本??(ben)次??(ci)研??(yan)究??(jiu)發(fā)??(fa)現(xiàn)?(xian)的??(de)圓??(yuan)尾??(wei)滇??(dian)東??(dong)魚(yú)??(yu)化??(hua)石??(shi)共??(gong)有??(you)13塊??(kuai)??，它??(ta)是?(shi)一??(yi)種??(zhong)長(zhǎng)??(chang)梭??(suo)形??(xing)小??(xiao)魚(yú)??(yu)??，次??(ci)圓??(yuan)形??(xing)尾??(wei)??，全?(quan)身??(shen)布??(bu)滿(mǎn)??(man)烏??(wu)黑??(hei)發(fā)??(fa)亮??(liang)的?(de)方??(fang)鱗?(lin)??，最??(zui)大??(da)個(gè)??(ge)體??(ti)全??(quan)長(zhǎng)??(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(yú)??(yu)類(lèi)??(lei)??。??年??(nian)代??(dai)地?(di)層??(ceng)學(xué)??(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(yú)??(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(yú)??(yu)類(lèi)??(lei)之?(zhi)一??(yi)???！　°q??(jiao)齒??(chi)魚(yú)??(yu)類(lèi)??(lei)的??(de)起??(qi)源??(yuan)和??(he)早??(zao)期?(qi)演??(yan)化??(hua)是??(shi)中??(zhong)國(guó)?(guo)科??(ke)學(xué)??(xue)院??(yuan)古??(gu)脊??(ji)椎??(zhui)所?(suo)中??(zhong)生??(sheng)代??(dai)魚(yú)??(yu)類(lèi)??(lei)研??(yan)究??(jiu)團(tuán)??(tuan)隊(duì)??(dui)的??(de)重?(zhong)要??(yao)課??(ke)題?(ti)之??(zhi)一?(yi)??，該??(gai)團(tuán)?(tuan)隊(duì)??(dui)近??(jin)年??(nian)來(lái)??(lai)的??(de)研??(yan)究??(jiu)表??(biao)明??(ming)??，鉸?(jiao)齒??(chi)魚(yú)??(yu)類(lèi)??(lei)的??(de)起??(qi)源??(yuan)時(shí)??(shi)間??(jian)比??(bi)恐??(kong)龍??(long)還??(hai)要??(yao)早??(zao)??，恐??(kong)龍??(long)最??(zui)早??(zao)出??(chu)現(xiàn)??(xian)在??(zai)晚??(wan)三??(san)疊?(die)世??(shi)??，而??(er)最??(zui)古??(gu)老??(lao)的??(de)鉸?(jiao)齒??(chi)魚(yú)??(yu)類(lèi)??(lei)在??(zai)中??(zhong)國(guó)??(guo)中??(zhong)三??(san)疊?(die)世?(shi)早??(zao)期??(qi)的??(de)羅?(luo)平??(ping)生??(sheng)物??(wu)群??(qun)中??(zhong)就??(jiu)已??(yi)經(jīng)??(jing)出??(chu)現(xiàn)??(xian)??，以?(yi)拱??(gong)魚(yú)??(yu)目??(mu)和?(he)這??(zhe)次??(ci)新??(xin)發(fā)??(fa)現(xiàn)??(xian)的??(de)圓??(yuan)尾??(wei)滇??(dian)東??(dong)魚(yú)?(yu)為?(wei)代??(dai)表??(biao)??。??(完?(wan))

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