kadabba to be a "chronospecies" of Ar. ramidus, bearing the same relationship to it that Au.

大多数科学家认为地猿卡达巴只不过是地猿始祖种的一个“年代种（chronospecies）”，二者之间存在的某种亲缘关系，就如同南猿湖畔种与南猿阿法种之间的相互联系：同一基本方案的一个较早期版本。

youdao

The female, named Ardi by the researchers who worked on her, belongs to a new species Ardipithecus ramidus and may be the earliest human ancestor ever discovered that was capable of walking upright.

研究员们给这名女性起名叫阿迪（Ardi），阿迪属于一个名为阿迪猿科分支（Ardipithecus ramidus）的新物种，她可能是迄今为止发现的能直立行走的最早的人类祖先。

youdao

That's how long it took for an international team of scientists to excavate and analyze the fossilized skeleton of a 4.4 million year old human ancestor, Ardipithecus ramidus, which was discovered in Ethiopia.

VOA: standard.2009.12.24