Paleontological Journal ( IF 0.6 ) Pub Date : 2020-11-23 , DOI: 10.1134/s0031030120060064 A. V. Pakhnevich
Abstract
The Devonian and Early Carboniferous brachiopod assemblages of the order Rhynchonellida from Transcaucasia (Nakhchivan Autonomous Republic of Azerbaijan and Armenia) are described. The succession of dominating rhynchonellid superfamilies and ecological types has been identified. Rhynchonellids were numerous in the Devonian; in the Early and Middle Devonian, the representatives of the superfamily Uncinuloidea prevailed. Their relict species survived up to the beginning of Famennian. The free-lying and anchoring cavern-dwelling rhynchonellids dominated in the Early and Middle Devonian. This ecological subtype is recognized for the first time. The rhynchonellid taxonomic and ecological groups changed at the Frasnian–Famennian boundary but rhynchonellids remained a significant part of the brachiopod fauna. The variability of rhynchonellids decreased at the Famennian–Tournaisian boundary but the superfamily Rhynchotrematoidea and the rhynchonellid anchoring ecological type continued to dominate starting from the Frasnian. The role of Rhynchonellida in the Early Carboniferous brachiopod fauna is insignificant. The decrease of variability within some zones is probably connected with taphonomic conditions.
中文翻译:
跨高加索地区泥盆纪和早石炭世的支气管虫(腕足纲)的生态和分类学演替。
摘要
描述了来自Transcaucasia(阿塞拜疆纳希切万自治共和国和亚美尼亚)Rhynchonellida阶的泥盆纪和石炭纪腕足动物组合。已经确定了支气管假单胞菌超家族的主要继承人和生态类型。泥盆纪的龙胆科动物很多。在泥盆纪早期和中期,超家族Uncinuloidea的代表占了上风。他们的遗lic物种幸存下来直到法门尼人开始。在泥盆纪早期和中期,自由地和锚定的洞穴式支气管梭菌占主导地位。首次认识到这种生态亚型。纤毛虫的分类学和生态学组在弗拉斯尼亚-法门尼边界发生了变化,但是纤毛虫仍然是腕足动物的重要组成部分。在Famennian-Tournaisian边界,横纹兰的变异性降低,但从弗雷斯尼亚开始,超家族的Rhynchotrematoidea和横纹兰的锚定生态类型继续占主导地位。大戟属在早期石炭纪腕足动物区系中的作用微不足道。在某些区域内变异性的降低可能与Thonomic条件有关。