CAJ | 학술논문

寒武纪没有化石苔藓动物的任何记录.最老的、毫无疑问的、真正的苔藓动物,发现于我国峡东地区的下奥陶统特马豆克阶地层中.这类苔藓动物以丰富但多样性低的变口目和少量的隐口目为代表.弗洛期的一些苔藓动物,在北美,英国和波罗的海地区(俄罗斯西北部)已相继发现,这时以Ceramopora?unapensis为代表的泡孔目苔藓动物开始出现,有一定的多样性.中奥陶世初期,苔藓动物迅速崛起,古生代狭唇纲的四个目--变口目、隐口目、泡孔目和管孔目(=环口目)苔藓动物都已经有了代表.由于奥陶纪是苔藓动物发生、演化发展和辐射的重要时期,因此,奥陶纪,特别是早奥陶世苔藓动物的任何新的发现,都有重要的意义.本文描述和解释的一个新的苔藓动物群,发现于安徽滁州琅琊山弗洛阶的红花园组上部.这个苔藓动物群由变口目爱沙尼亚苔虫亚目的两个种:Dianulites hexaporites(Pander),Orbiramus grandis sp.nov.和隐口目翼网苔虫亚目的一个种:Prophyllodi-ctya putilovensis Lavrentjeva组成.尽管这个苔藓动物群在局部地区可能还是低多样性的,但就整个世界范围而言,有一定的多样性,类似于同样以变口目苔藓动物占优势的比林根苔藓动物群,后一苔藓动物群产于波罗的海以东地区(俄罗斯西北部)同时代的地层中.
한무기몰유화석태선동물적임하기록.최로적、호무의문적、진정적태선동물,발현우아국협동지구적하오도통특마두극계지층중.저류태선동물이봉부단다양성저적변구목화소량적은구목위대표.불락기적일사태선동물,재북미,영국화파라적해지구(아라사서북부)이상계발현,저시이Ceramopora?unapensis위대표적포공목태선동물개시출현,유일정적다양성.중오도세초기,태선동물신속굴기,고생대협진강적사개목--변구목、은구목、포공목화관공목(=배구목)태선동물도이경유료대표.유우오도기시태선동물발생、연화발전화복사적중요시기,인차,오도기,특별시조오도세태선동물적임하신적발현,도유중요적의의.본문묘술화해석적일개신적태선동물군,발현우안휘저주랑야산불락계적홍화완조상부.저개태선동물군유변구목애사니아태충아목적량개충:Dianulites hexaporites(Pander),Orbiramus grandis sp.nov.화은구목익망태충아목적일개충:Prophyllodi-ctya putilovensis Lavrentjeva조성.진관저개태선동물군재국부지구가능환시저다양성적,단취정개세계범위이언,유일정적다양성,유사우동양이변구목태선동물점우세적비림근태선동물군,후일태선동물군산우파라적해이동지구(아라사서북부)동시대적지층중.
In the Cambrian there were no fossil bryozoans found anywhere in the world. The oldest unequivocal bryo-zoans, which are representative of abundant trepostomes and rare cryptostomes, occurred in the late Tremadocian ofeast Yangtze Gorges in China. Some Floan bryozoans are discovered in North America, Britain and Baltic districts(northwestern Russia) with moderate diversity, where cystoporates represented by Ceramopora? unapensis make their first appearances. During the early Middle Ordovician, bryozoans rapidly evolved and radiated, with four Paleo-zoic stenolaemate orders [trepostomes, cryptostomes, cystoporates and tubuliporates (= cyclostomes)] being estab-lished. Because the Ordovician is an important period of the origin, evolution and radiation of the bryozoans, any new discovery of bryozoans, especially in the Early Ordovician, is significant for bryozoologists. A new bryofauna is repor-ted here from the upper part of the Hunghuayuan Formation of the Floan Stage of Langyashan, Chuzhou, Anhui in China. It comprises two species, Dianulites hexaporites (Pander), Orbiramus grandis sp. nov. of trepostome estho-nioporines, and one species, Prophyllodictya putilovensis Lavrentjeva of cryptostome ptilodictyines. Although the bryofauna is relatively of lower diversity in this area, as compared with other bryofaunas in the world, it is quite simi-lar to that of the Billingen, which is also dominated by trepostomes, from coeval strata of northwestern Russia (East Baltic).