In North Africa, the ammonoids constitute an important part of the Devonian marine macro-invertebrates. New material has been recently collected in the ‘Argiles de Marhouma’ Formation from several sections located near Béni-Abbès in the Saoura Valley (Ougarta Mountains, Algerian Sahara). Red nodular limestones (i.e., ‘griotte’ facies) characterize this formation rich in ammonoids. The assemblages from the Ouarourout section are composed of Goniatitida and Clymeniida constituting 30 species and 19 genera belonging to 11 families, with Cyrtoclymenia, Erfoudites, Kosmoclymenia, Planitornoceras, Platyclymenia, and Prionoceras, as the most abundant genera. The taxonomic comparison and the biostratigraphic correlations are made by considering the assemblages recorded in the Anti-Atlas of Morocco, which are very close to those observed in Algeria. In the Ouarourout area, the ‘Argiles de Marhouma’ Formation contains middle and late Famennian ammonoid assemblages and three biostratigraphic intervals can be identified: Planitornoceras, Platyclymenia and Medioclymenia.

在北非，铵盐类是泥盆纪海洋无脊椎动物的重要组成部分。最近，从位于索拉河谷贝尼-阿贝斯附近（奥加尔塔山脉，阿尔及利亚撒哈拉沙漠）的几个地区的“ Argiles de Marhouma”地层中收集了新材料。红色结节状石灰岩（即“格罗特”相）是富含铵盐的岩层的特征。Ouarourout部分的组合由Goniatitida和Clymeniida组成，分别属于11个科的30种和19属，并伴有Cylyoclymenia，Erfoudites，Kosmoclymenia，Planitornoceras，Platecylymenia和Prionoceras，作为最丰富的属。分类学比较和生物地层学相关性是通过考虑《摩洛哥反图集》中记录的组合进行的，这些组合与阿尔及利亚的组合非常接近。在Ouarourout地区，'Argiles de Marhouma'地层包含中晚期法门尼铵类组合，可以确定三种生物地层学间隔：扁平藻，侧柏和中间膜。