在一种包含蜘蛛的群落中,有两种亲缘关系很近的蜘蛛。
It is as though anthropologists had discovered villages populated both by human beingsand chimpanzees.
这就像是人类学家发现村落中既住着人类也住着黑猩猩。
This was discovered by a team led by Lena Grinsted of Aarhus University in Denmark.
这一现象由丹麦奥尔胡斯大学莉娜格林斯蒂德带领的团队发现。
They were studying a social species of spider called Chikunia nigra, living near BeratanLake in Bali.
当时他们在研究一种生活在巴厘岛贝拉坦湖畔、名为Chikunia nigra的社会性蜘蛛。
Later, as they looked in more detail at their specimens, they realised its genes and genitaliarevealed that it was actually two species, according to their findings just published inNaturwissenschaften.
后来随着对标本研究的日益深入,他们发现基因和生殖器都表明标本分属两个物种。其研究结果新近见刊于《自然科学》。
Exactly what the spiders get out of being social is not clear.
社会性对蜘蛛有何益处目前尚不清楚。
They do not hunt together.
它们并不共同捕食。
One explanation may be that the colony is acting like a giant creche.
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