Explosive speciation and preservation of ancestral taxa in the interstitial Ostracoda (Crustacea)

在日本潮间带发现间质介形虫80余种，其中新发现10种。DNA分析表明，间质介形虫是由多个地表栖息类群平行衍生而来的，这些类群在系统发育上彼此不同，并且在适应间质环境方面具有一定的进化趋势。大多数间质介形虫比表面生活的介形虫小得多，这是通过减少两次蜕皮之间的生长比来实现的。

More than 80 species of interstitial Ostracoda were recognized from the intertidal zone of Japan, including 10 species that were described as new. The analysis of DNA suggested that interstitial ostracods were derived in parallel from multiple surface dwelling taxa that are phylogenetically apart from one another, and that some evolutionary trends are recognizable for the adaptation to interstitial environments. Most interstitial ostracods are much smaller than surface dwelling ones, and this is achieved by reducing the growth ratio between molts.