CAJ | 학술논문

处于"寒武纪生命大爆发"序幕阶段的梅树村期,生物类群大规模辐射,身体构型快速革新,与前寒武纪生物群面貌明显不同.最近在陕南宁强宽川铺地区梅树村期地层中发现了大量五辐射Punctatus及部分四辐射四方塔形壳属Quadrapyrgites,其中包括1个新种Quadrnpyrgites undulatuscostalis sp.nov..在此基础上对Quadrapyrgites进行了属征补充.双胚层腔肠动物的出现标志着地球生命史的真后生动物演化开端,在生物起源演化历程上占据着关键的位置.本文为研究真后生动物起源演化、生物辐射、体型构建提供了重要实证.
처우"한무기생명대폭발"서막계단적매수촌기,생물류군대규모복사,신체구형쾌속혁신,여전한무기생물군면모명현불동.최근재협남저강관천포지구매수촌기지층중발현료대량오복사Punctatus급부분사복사사방탑형각속Quadrapyrgites,기중포괄1개신충Quadrnpyrgites undulatuscostalis sp.nov..재차기출상대Quadrapyrgites진행료속정보충.쌍배층강장동물적출현표지착지구생명사적진후생동물연화개단,재생물기원연화역정상점거착관건적위치.본문위연구진후생동물기원연화、생물복사、체형구건제공료중요실증.
The Meishucun stage is a crucial interval for studying the Cambrian Explosion,when an evolutionary radiation and innovation of metazoan bauplans took place and different association of organism have been shaped.In this paper we report several rare fossils of Quadrapyrgites with a fourfold symmetry.By systematically studying these fossils,the authors propose herein Quadrapyrgites undulatuscostalis sp.nov.and provide additional discussions on the Genus Quadrapyrgites.The appearance of coelenterates marks the real beginning of metazoan evolution.Therefore,it has the prominent position in the origin and evolutlonary history of organisms.The new material provides new evidence for the origin,evolution and the bauplan of the metazoan during the early Stage of the Cambrian Explosion.