New conodont data provide further constraints on the occurrence of the Devonian-Carboniferous boundary in the Kule section through the carbonate Novchomok Formation (Kitab Reserve, Uzbekistan). The stratigraphically condensed section includes the interval from the uppermost Famennian Pseudopolygnathus granulosus–lowermost Protognathodus kockeli zones to the middle Tournaisian Siphonodella crenulata Zone. In addition to revision of earlier published taxonomic and biostratigraphic data, two previously unreported taxa are described: Polygnathus sp. n. A and a peculiar form probably representing a new genus (gen. et sp. indet.). The biofacies analysis documents a succession of polygnathid, siphonodellid-polygnathid, polygnathid-siphonodellid to polygnathid-bispathodid, and again polygnathid-siphonodellid biofacies. The generic composition of the samples and relative abundance of Polygnathus purus reflect deep marine environments of the continental slope and rise.

新的牙形体数据进一步限制了碳酸盐Novchomok组（乌兹别克斯坦Kitab储层）在库勒剖面泥盆纪-石炭纪界的发生。地层压缩段包括从最上层的法门尼假多孢虫颗粒区-最下层的Protognathodus kockeli区到中部的图尔纳西角弯弯线虫区的间隔。除了修订较早发布的分类学和生物地层学数据外，还描述了两个以前未报告的分类单元：Polygnathussp。。和可能代表一个新属的特殊形式（gen。et sp。indet。）。生物相分析记录了一系列的polygnathid，虹吸管-polygnathid，polygnathid-siphonodellid到polygnathid-bispathodid，以及polygnathid-虹吸管生物相。样品的一般成分和虎耳草的相对丰度反映了大陆坡和上升的深海环境。