本文所叙述的材料,系内蒙古地质局126队地质组在找矿工作中,采自内蒙古锡林郭勒盟阿巴嘎旗的红格尔庙。该地地层出露不好,化石是在槽探过程中采得的,含菊石地层主要是一套紫红色砂砾岩和灰绿色泥灰岩,厚度不详。化石层之下是一套中—基性火山岩。化石多数保存在含铁硅质的钙质结核中,表面多被铁质浸染,十分完整,除菊石外尚有少量的鹦鹉螺类、腕足类和双壳类。这套含菊石地层曾命名阿巴嘎旗组,先后被归于泥盆系和石炭系。由于命名依据不足,故本文不再采用阿巴嘎旗组一名 The material described in this paper is collected from the Honggyal Temple of Abaga Banner, Xilin Gol League, Inner Mongolia, during the prospecting work by the 126-team geological group of Inner Mongolia Geological Bureau. The strata in this area are not exposed well. The fossils were taken during the trenching process. The ammoniated strata mainly consisted of fuchsia sandy gravel and lime-green marl, with an unknown thickness. Below the fossil layer is a set of medium-basic volcanic rocks. Fossils are mostly preserved in iron-containing siliceous calcareous nodules, the surface is more iron-impregnated, very complete, in addition to a small amount of ammonites outside the nautilus, brachiopods and bivalves. This set of ammonite strata has been named Abagaqi group, has been attributed to the Devonian and Carboniferous. Due to the lack of naming, so this article will no longer use one of Abagaqi group