Iwata A, Kobayashi T, Ikeo K, Imanishi T, Ono H, Umehara Y, Hamamatsu C, Sugiyama K, Ikeda Y, Sakamoto K, Fumihito A, Ohno S, Gojobori T
The Imperial Residence, 1-1 Chiyoda Chiyoda-ku, 100-0001, Tokyo, Japan
Gene. 2000 Dec 23;259(1-2):5-15. doi: 10.1016/s0378-1119(00)00488-1.
The Gobioidei is a large suborder in the order Perciformes and consists of more than 2000 species belonging to about 270 genera. The vast number of species and their morphological specialization adapted to diverse habits and habitats makes the classification of the gobioid fishes very difficult.A comprehensive estimation of the evolutionary scenario of all gobioid fishes using only morphological information is difficult for two major reasons: first, in addition to wide ecological diversification, there is a trend towards specialization and degeneration of morphological characters among these species; second, an appropriate outgroup of gobioid fishes has not been recognized. Based upon nucleotide sequence comparisons of gobioid mitochondrial cytochrome b genes, we established the phylogenetic relationships of their differentiation into many groups of morphological and ecological diversity. The phylogenetic trees obtained show that most species examined have diverged from each other almost simultaneously or during an extremely short period of time.
虾虎鱼亚目是鲈形目中的一个大亚目，由约270个属的2000多种鱼类组成。虾虎鱼类物种数量众多，且其形态特化适应了多样的习性和栖息地，这使得虾虎鱼的分类非常困难。仅利用形态学信息对所有虾虎鱼类的进化情况进行全面评估存在两大困难：其一，除了广泛的生态分化外，这些物种之间还存在形态特征特化和退化的趋势；其二，尚未识别出合适的虾虎鱼外类群。基于虾虎鱼线粒体细胞色素b基因的核苷酸序列比较，我们建立了它们分化为许多形态和生态多样类群的系统发育关系。所得的系统发育树表明，大多数被研究的物种几乎是同时或在极短的时间内彼此分化的。
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