Wainright P O, Hinkle G, Sogin M L, Stickel S K
Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08903.
Science. 1993 Apr 16;260(5106):340-2. doi: 10.1126/science.8469985.
A phylogenetic framework inferred from comparisons of small subunit ribosomal RNA sequences describes the evolutionary origin and early branching patterns of the kingdom Animalia. Maximum likelihood analyses show the animal lineage is monophyletic and includes choanoflagellates. Within the metazoan assemblage, the divergence of sponges is followed by the Ctenophora, the Cnidaria plus the placozoan Trichoplax adhaerens, and finally by an unresolved polychotomy of bilateral animal phyla. From these data, it was inferred that animals and fungi share a unique evolutionary history and that their last common ancestor was a flagellated protist similar to extant choanoflagellates.
通过对小亚基核糖体RNA序列进行比较推断出的系统发育框架，描述了动物界的进化起源和早期分支模式。最大似然分析表明，动物谱系是单系的，包括领鞭毛虫。在后生动物组合中，海绵动物分化之后是栉水母动物、刺胞动物门加上扁盘动物黏丝盘虫，最后是双侧对称动物门的一个未解决的多分支。从这些数据可以推断，动物和真菌有着独特的进化历史，它们最后的共同祖先是一种类似于现存领鞭毛虫的具鞭毛原生生物。
