Abstract

The biostratigraphic data on the ammonoid, brachiopod, conodont, and ostracod assemblages of the Mamontovo and Zarechnoe horizons of the Salair were revised and analyzed. The stratigraphic succession of the Middle Devonian deposits of the Salair is clarified, and the new Zarechnoe Horizon, including the Akarachkino, Safonovo, and Kerlegesh beds, is proposed. The upper Eifelian ammonoid assemblage of the Agoniatites Zone, established in the upper part of the Akarachkino Beds, is the biostratigraphic level for global correlations. The upper Eifelian and lower Givetian brachiopod assemblage (Indospirifer padaukpinensis (=I. pseudowilliamsi)) characterizes the Safonovo Beds. Two middle Givetian brachiopod zones were recognized in the Kerlegesh Beds: Rhynchospirifer hians (=Ilmenia subhians) and Subrensselandia? salairica (=“Chascothyris” salairica). The conodont assemblage of the Akarachkino Beds characterizes the upper Eifelian. The middle Givetian conodont assemblage, including Icriodus difficilis Ziegler et Klapper, Polygnathus linguiformis klapperi Clausen, Leuteritz et Ziegler, Po. parawebbi Chatterton beta morphotype, Po. ovatinodosus Ziegler et Klapper, and Po. pseudofoliatus Wittekind, was found in the upper part of the Safonovo Beds. No conodont assemblage was found in the Kerlegesh Beds.

中文翻译：

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西伯利亚西南部萨莱尔中泥盆纪生物地层学的新数据

摘要

Salair 的 Mamontovo 和 Zarechnoe 层位的菊石、腕足类、牙形石和介形类组合的生物地层数据进行了修订和分析。Salair 中泥盆统矿床的地层序列得到澄清，并提出了新的 Zarechnoe 地平线，包括 Akarachkino、Safonovo 和 Kerlegesh 层。在 Akarachkino 层的上部建立的 Agoniatites 带的上 Eifelian 菊石组合是全球相关的生物地层水平。上 Eifelian 和下 Givetian 腕足类组合（Indospirifer padaukpinensis（= I. pseudowilliamsi)) 是 Safonovo 床的特点。在 Kerlegesh Beds 中发现了两个中间的 Givetian 腕足类动物区域：Rhynchospirifer hians (=Ilmenia subhians) 和 Subrensselandia? salairica（=“Chascothyris”salairica）。Akarachkino Beds 的牙形石组合是上 Eifelian 的特征。中间的 Givetian 牙形石组合，包括Icriodus difficilis Ziegler et Klapper、Polygnathus linguiformis klapperi Clausen、Leuteritz et Ziegler、Po。parawebbi Chatterton beta 形态型，Po。ovatinodosus Ziegler et Klapper 和Po。pseudofoliatus Wittekind，发现于 Safonovo 床的上部。在 Kerlegesh Beds 中没有发现牙形石组合。