There is comprehensive, complementary sedimentological, faunal and paleogeographic data to indicate that myodocopid ostracods invaded the water column in the Silurian, in the latest Wenlock and especially the Ludlow Epoch, resulting in the pioneer pelagic ostracod fauna. As detailed herein, there is now also considerable paleobiological evidence, from study of rare, exceptionally preserved fossil myodocopes, particularly the nektobenthic myodocopids of the mid Wenlock Herefordshire Lagerstätte, UK, that anatomical and other features that enabled this ecological transition were already present in early Silurian myodocopes. The oldest known Silurian myodocope, a species of the Herefordshire cylindroleberidid myodocopid genus Pauline, established from shells from Telychian Llandovery Series carbonates of Greenland, would have had similar anatomical features and therefore adaptations for nektonic activity. Evidence from rare Late Ordovician species suggests even earlier nektobenthic activity by myodocopes.

有全面、互补的沉积学、动物区系和古地理数据表明，在最近的文洛克时代，特别是勒德洛纪，myodocopid 介形虫侵入了志留纪的水体，形成了先锋中上层介形虫动物群。正如本文所详述的，现在也有大量古生物学证据，来自对稀有、保存完好的化石 myodocopes 的研究，特别是英国 Wenlock Herefordshire Lagerstätte 中部的内陆底栖 myodocopids，这些解剖学和其他特征已经存在于早期志留纪myodocopes。已知最古老的志留纪 myodocope，Herefordshire cylindroleberidid myodocopid 属Pauline的一种，从格陵兰的 Telychian Llandovery 系列碳酸盐岩中建立，具有相似的解剖学特征，因此适应了游动活动。来自稀有晚奥陶世物种的证据表明，myodocopes 甚至更早的 nektobenthic 活动。