Abstract

New belemnite species of the family Cylindroteuthididae are described from the Ryazanian and Valanginian sediments of the Nordvik Peninsula, namely Arctoteuthis angusta sp. nov. and Boreioteuthis mirifica sp. nov. The species Lagonibelus necopinus (Gustomesov, 1960), which was previously known only from the North Urals, was recognized for the first time in East Siberia, and the study of ontogenetic changes in the rostra of this species allowed substantiation of its subfamily and generic affiliation.

中文翻译：

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来自北东西伯利亚下白垩统，北维克半岛的 Cylindroteuthididae 家族的新 Belemnites

摘要

从诺德维克半岛的梁赞和瓦朗吉尼沉积物中描述了 Cylindroteuthididae 家族的新品种，即Arctoteuthis angusta sp。十一月 和Boreioteuthis mirifica sp。十一月 Lagonibelus necopinus (Gustomesov, 1960)物种以前仅在北乌拉尔地区为人所知，它在东西伯利亚首次被认可，对该物种花名册中个体发育变化的研究允许证实其亚科和属属关系.