Abstract

The Oxfordian–Kimmeridgian Cerithiopsidae, represented by two genera Cosmocerithium Cossmann, 1906 and Dragonia gen. nov. are re-investigated. Three species (C. renardi (Rouillier, 1849), C. pumilum (Gerasimov, 1992), and C. veliger sp. nov.), representing the same phylogenetic line, are distinguished in the genus Cosmocerithium. These species formed during the gradual morphological evolution, traced from the Middle Oxfordian to Early Kimmeridgian. The diagnosis of all Cosmocerithium species was revised and improved. As a result, the species C. contiae Guzhov, 2002 was included into synonymy of C. pumilum. Two new species are described in the composition of Dragonia: D. minuta sp. nov. (index species) and D. longa sp. nov. It is proposed that Cosmocerithium species were necrophages. It was revealed that Dragoniaminuta belongs to assemblages, which inhabited sunken wood and was able to bore wood fragments.

中文翻译：

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来自欧洲俄罗斯的侏罗纪蛇尾科的新数据

摘要

牛津-基米尼迪科犬科，以两个属Cosmocerithium Cossmann（1906年）和Dragonia属为代表。十一月 被重新调查。三种（C. renardi（Rouillier，1849），C.细叶（格拉西莫夫，1992），和C.面盘菌属十一月），表示相同的系统发育线，来区分在属Cosmocerithium。这些物种是在逐渐的形态演变过程中形成的，从牛津中部到基米底早期。修改了所有Cosmocerithium物种的诊断。结果，物种C. contiae Guzhov，2002被包括在C. pumilum的代名词中。。Dragonia的组成中描述了两个新物种：D. minuta sp.。十一月 （索引种类）和D. longa sp。十一月 有人认为Cosmocerithium物种是尸体。据透露，Dragonia minuta属于一种组合，栖息于下沉的木材中，并且能够钻出木材碎片。