通过对我国己经正式发表的abadiellid类三叶虫的18个种(包括2个属和1个亚属)模式标本的头盖特征进行 Q 型聚类分析，并结合传统定性分析后，再次证明 Parabadiella Chang，1966，Parabadiella(Danangouia)Chen，1985和 Guangyuanaspis Chang and Qian，1974均是 Abadiella Hupé，1953的晚出异名；另将该属的18个种归并为9个种：A．huoi(Zhang，1966)，A．elegans(Lee，1978)，A．longmenshanensis(Lee，1978)，A．yunnanensis(Luo，1981)，A．elevata(Lee，1978)，A．hanzhongensis(Chen，1985)，A．modaoyaensis(Chang and Qian，1974)，A．shaanxiensis(Zhang and Lin，1980)，A．wudingensis(Zhang and Lin，1980)。本文将对研究我国寒武纪三叶虫系统演化、生物地理分区以及生物地层划分和时代的确定，提供重要依据。

In the present paper,the method of"Q-mode cluster analysis"is used in a taxonomic study of 18 cranidia belonging to abadiellid trilobite genera(subgenera)of traditional early Cambrian age.The statistical measurement of similarity is incremental sum of error squares(ΔE). The author uses the variables in the eight quantitative ratio form(see table 1).The resemblance relation matrices of all specimens are formed through calculation of the increments of sum of error squares between those specimens(see table 2).Finally,the two-dimensional dendrogram is drawn by stepwise calculation(see text-fig.2).The dendrogram(text-fig.2)shows nine specific groups by the association line having a value of increments of sum of error squares 0.1.They correspond as follows:Group A(= Abadiella huoi)—containing 5 species:Parabadiella huoi Zhang,1966(1),Parabadiella shaanxiensis Zhang and Lin,1980(7),Parabadiella obscurata Zhang and Lin,1980(9),Parabadiella(Danangouia)quadrata Chen,1985(3),Parabadiella tenuilimbata Zhang and Lin,1980(8).Group B(=Abadiella elegans)—containing 2 species:Guangyuanaspis elegans Lee,1978(14),Guangyuanaspis fandianensis Zhang and Lin,1980(15).Group C(= Abadiella longmenshanensis)—containing only 1 species: Parabadiella longmenshanensis Lee,1978(11).Group D(= Abadiella yunnanensis)—containing 2 species:Parabadiella yunnanensis Luo,1981(17),Parabadiella zhongliangsiensis Chen,1985(6).Group E(=Abadiella elevata)—containing 2 species:Parabadiella elevata Lee,1978(12),Parabadiella conica Luo,1981(16).Group F(= Abadiella hanzhongensis)—containing 3 species:Parabadiella(Danangouia)transversa Chen, 1985(2), Parabadiella hanzhongensis Chen, 1985(4), Parabadiella nanzhengensis Chen,1985(5).Group G(= Abadiella modaoyaensis)—containing only 1 species: Guangyuanaspis modaoyaensis Chang and Qian,1974(13).Group H(= Abadiella shaanxiensis)—containing only 1 species too:Guangyuanaspis shaanxiensis Zhang and Lin,1980(10).Group I(= Abadiella wudingensis)—containing also only 1 species:Guangyuanaspis wudingensis Zhang and Lin,1980(18).Through the application of combined cluster analysis with traditional qualitative analysis in the study of 18 species of abadiellid trilobites in this paper,the opinion on lumping and transferring the studied species is proposed(see table 3).

国家自然科学基金项目(41372018)资助