CAJ | 학술논문

发现于贵州省瓮安和福泉县晚新元古代陡山沱期磷块岩中的一组可疑的磷酸盐化原生动物化石,暂定为1新属--侧孔虫(Luxapertus gen.nov.).单房室壳体,卵形、球形及椭球形,磷酸盐化外壁1-2层,房室内分布磷酸盐化微粒和原生质(?)残留物分布不均匀形成各种不规则斑纹.壳体前方一侧发育内口管的管状或乳头状口孔,管状口孔有清晰的丝状伪足伸出,其前端或壳体后方附有一团原生质(?)残留物.上述特征表明这一类化石与有孔虫(Foraminifera)似有明显的亲缘关系.根据标本的形态特征和口孔性质,本文初步记述了这批材料中的瓮安侧孔虫(Luxapertus wenganensis gen.et sp.nov.)、球形侧孔虫(Luxapertus sphaeroidolis gen.et sp.nov.)和乳头侧孔虫(Luxapertuspapillaformis gen.et sp.nov.)等三种侧孔虫新种,疑为地球早期原生动物的代表.这一发现丰富了瓮安生物群的内容,证明瓮安生物群中确有可疑的原生动物化石存在.一般认为有孔虫在寒武纪开始出现.瓮安生物群中可疑的有孔虫类的发现,使有孔虫首次出现的记录大大提前.
발현우귀주성옹안화복천현만신원고대두산타기린괴암중적일조가의적린산염화원생동물화석,잠정위1신속--측공충(Luxapertus gen.nov.).단방실각체,란형、구형급타구형,린산염화외벽1-2층,방실내분포린산염화미립화원생질(?)잔류물분포불균균형성각충불규칙반문.각체전방일측발육내구관적관상혹유두상구공,관상구공유청석적사상위족신출,기전단혹각체후방부유일단원생질(?)잔류물.상술특정표명저일류화석여유공충(Foraminifera)사유명현적친연관계.근거표본적형태특정화구공성질,본문초보기술료저비재료중적옹안측공충(Luxapertus wenganensis gen.et sp.nov.)、구형측공충(Luxapertus sphaeroidolis gen.et sp.nov.)화유두측공충(Luxapertuspapillaformis gen.et sp.nov.)등삼충측공충신충,의위지구조기원생동물적대표.저일발현봉부료옹안생물군적내용,증명옹안생물군중학유가의적원생동물화석존재.일반인위유공충재한무기개시출현.옹안생물군중가의적유공충류적발현,사유공충수차출현적기록대대제전.
A well preserved microfossil group of possible Protozoa is discovered from Late Neoproterozoic Doushantuo phosphorites in Wengan-Fuquan area, Guizhou with a new genus Luxapertus gen. Nov.described. Phosphatized micrinites and protoplasm(?) distributed as irregular stripes in chamber. Aperture tubelike with internal siphon or papillar, at one side of the anterior of test. The tubelike aperture developed a filiform pseudopodia, with a group remains of protoplasm(?) at the front of the and the rear of test. The characteristics of the new genus suggest closest affinities with Foraminifera. On the basis of morphological characters and aperture features of these specimens, three new species are described Luxapertus wenganensis, Luxapertus sphaeroidolis and Luxapertus papillaformis for the representatives of possible early stage Protozoa on Earth. The discovery is not only enriching content of Wengan Biota but also providing evidence for possible Protozoa in it . As a general rule, Foraminifera appears in Cambrian, the discovery of a suspicious Foraminifera from Wengan Biota suggests an earlier origin.