THREE NEW SPECIES OF NICRICOLOR SPECIES - GROUP OF DROSOPHILA ( LORDIPHOSA ) ( DIPTERA: DROSOPHILIDAE )

黑色拱背果蝇种组三新种记述 ( 双翅目: 果蝇科 )

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Mitotic metaphase chromosomes of 34 species of Drosophila melanogaster species group were examined.

观察了国内黑腹果蝇种组34种果蝇的有丝分裂中期核型,其中首次描述了一些新核型.

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The oaks are by far the largest species group growing in the Eastern hardwood forests.

橡木是东部阔叶木林树种之中,品种数目最多的树木.

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