Abstract

The species Livnolepis heckeri (Lukševičs, 2001) which had been assigned to the genus Bothriolepis at first description, was described from the Famennian sediments (Upper Devonian) of the Tver oblast. New materials collected from a type locality near the village of Bilovo enabled considerable expansion of the morphological description of the species. The plates of the entire head shield and almost the entire trunk shield, as well as the plates of the proximal segment of the pectoral fin, are known for L. heckeri. Specimens from different ontogenetic stages were available for some plates. The genus Livnolepis currently includes two species: L. zadonica (H. Obrucheva, 1983) from the Lower Famennian of the Central Devonian Field and L. heckeri (Lukševičs, 2001) from the middle Famennian of the southwestern margin of the Main Devonian field. A large preorbital recess of the head shield and weakly conspicuous anterolateral corners of the otico-occipital depression on the internal surface of the head shield are the most characteristic structural features of the Livnolepis exoskeleton.

中文翻译：

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特维尔州的晚泥盆世虫脉虫（Placodermi，Antiarchi）

摘要

从特维尔州的法门尼亚沉积物（上泥盆纪）描述了最早被归类为伯氏鸟属的Livnolepis heckeri（Lukševičs，2001）。从比洛沃村附近的典型地方收集的新材料使该物种的形态学描述得到了极大的扩展。整个头盾和几乎整个躯干盾的板，以及胸鳍近端段的板，都以L. heckeri着称。来自不同个体发育阶段的标本可用于某些板。Livnolepis属目前包括两个物种：来自中泥盆纪田地下法门尼亚的L. zadonica（H. Obrucheva，1983）和L. heckeri（Lukševičs，2001）来自泥盆纪主油田西南缘中部的法门尼中部。Livnolepis外骨骼最典型的结构特征是头罩的眶前凹处较大，以及头罩内表面上的枕枕凹陷的前突角较弱。