Sherbakov D Y, Kamaltynov R M, Ogarkov O B, Verheyen E
Limnological Institute, Siberian Branch of Russian Academy of Sciences, Irkutsk, 664033, Russia.
Mol Phylogenet Evol. 1998 Oct;10(2):160-7. doi: 10.1006/mpev.1997.0482.
The Baikalian gammarids (Crustacea, Amphipoda) are the most widely known and most spectacular example of an adaptive radiation among contemporary freshwater invertebrates. To study the phylogeny of the Baikalian gammarids we sequenced a 622-bp-long fragment of the nuclear gene coding for 18S rRNA from species of 18 endemic Baikalian genera and Gammarus pulex-a non-Baikalian taxon. Some important morphological characters appear independently in both lineages and suggest parallelism in the development of gigantism and body armament. The first lineage comprises benthic, mostly unarmed taxa. The second lineage contains predominantly armed taxa, most of which are detrivorous or carnivorous.
贝加尔湖钩虾（甲壳纲，端足目）是当代淡水无脊椎动物中适应性辐射最为人熟知且最为引人注目的例子。为了研究贝加尔湖钩虾的系统发育，我们对来自18个贝加尔湖特有属的物种以及一种非贝加尔湖分类群——蚤状钩虾的18S rRNA编码核基因的一段622个碱基对长的片段进行了测序。一些重要的形态特征在两个谱系中独立出现，这表明在巨型化和身体武装的发展过程中存在平行现象。第一个谱系包括底栖的、大多无武装的分类群。第二个谱系主要包含有武装的分类群，其中大多数是食腐或食肉的。
