Abstract

Representatives of the family Medlicottiidae (Ammonoidea) from the Permian of the Verkhoyansk Region are revised. Medlicottiids in the region are represented only by the subfamily Uddenitinae and are only known from four stratigraphic levels in the Lower Permian. Prouddenites evolutus sp. nov., representing the terminal phase of the morphogenetic development of the genus Prouddenites is found near the base of the Asselian (lower part of the Khorokyt Formation). A fragment of the body chamber of a representative of the Uddenitinae with no certain generic affinity was found in the Uraloceras subsimense Beds of the Sakmarian Stage (Lower Echij Subformation). Representatives of the species Neouddenites echiensis sp. nov., the most primitive known Neouddenites species, were found in the Upper Echij Subformation of the Artinskian Stage. Most medlicottiid occurrences (Neouddenites andrianovi Ruzhencev, 1961) were from the lower part of the Tumarian Regional Stage (Orol Formation) of the Kungurian Stage. The origin of the genus Neouddenites from Prouddenites is suggested. Two new species of Medlicottiidae (P. evolutus and N. echiensis) are described.

中文翻译：

---

韦尔霍扬斯克州的二叠纪铵盐科Medlicottiidae

摘要

修订了来自Verkhoyansk地区二叠纪的Medlicottiidae（Ammonoidea）家族的代表。该地区的混血儿仅以Uddenitinae亚科为代表，仅在下二叠纪的四个地层中才知道。Prouddenites evolutus sp.。11月11日在Asselian底部（Khorokyt组下部）附近发现了代表Prouddenites形态发生发展末期的相。在萨克马里阶段的次乌拉尔奇拉斯河床中发现了Uddenitinae代表体腔的一个片段，没有一定的通用亲和力（较低的Echij亚型）。越橘新物种的代表sp。nov。是最原始的新近新物种，发现于Artinskian阶段的上Echij亚型中。大多数混血儿发生（新uddendenites和rianovi Ruzhencev，1961）来自昆古里亚期的塔马里地区期（石油形成）的下部。属的起源Neouddenites从Prouddenites建议。描述了两种新的地中海科物种（P. evolutus和N. echiensis）。