Abstract

A new species, Phoebodus curvatus from the Middle and Upper Devonian of the Middle and South Urals is described. The teeth of the new species differ from the teeth of other Phoebodus species in the very long lateral cusps curved lingually, and narrow labio-basal projection protruding beyond the labial edge. The distribution of all known Phoebodus species is analyzed. The ranges of five previously established phoebodontid zones are revised and emended. Two species radiations are recorded in the Late Frasnian and the Middle-Late Famennian.

中文翻译：

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乌拉尔泥盆纪的一种新的Phoebodontid鲨鱼和Phoebodus物种的分布

摘要

描述了来自中乌拉尔和南乌拉尔的中泥盆统和上泥盆统的新种Phoebodus curvatus。新物种的牙齿与其他Phoebodus物种的牙齿不同之处在于非常长的侧尖向舌侧弯曲，并且狭窄的唇基部突出超出唇缘。分析了所有已知Phoebodus物种的分布。修订和修订了先前建立的五个 phoebodontid 区域的范围。在晚弗拉斯期和中晚法门期记录了两种辐射。