The lower Famennian ‘Cyrtospirifer’ orbelianus brachiopod Zone established in Armenia by Abrahamyan (1957) (coeval to the crepida conodont Zone) contains an abundant and diverse brachiopod fauna that still remains poorly studied. In an effort to revise and update its systematic classification and to assess the brachiopod diversity in this area after the Kellwasser extinction event at the end of the Frasnian, our attention is here focused on rhynchonellides and athyrides. Six rhynchonellide species are described belonging to five genera as well as a single athyride species (Crinisarina pseudoglobularis n. sp.), which is new to science. The genus Crinisarina is reported for the first time in the South Armenian Block (SAB), which was then part of the northern margin of Gondwana. Some of the rhynchonellides identified were previously recognized in this area, but they require modern documentation and taxonomic reassessment. More particularly, it is the first time that the internal structure of Sartenaerus baitalensis (Reed, 1922) is illustrated, taking into account that it is the type species of a biostratigraphically significant Famennian genus. One of the oldest punctate rhynchonellide species, Greira transcaucasica Erlanger, 1993, is described for the first time from Armenia and its intraspecific morphological variability is documented quantitatively. From a paleobiogeographic viewpoint, the studied brachiopod fauna clearly shares affinities with contemporaneous ones from other regions of the Gondwanan northern margin that extend eastwards of the SAB to Afghanistan and Pamir, although there are also some endemic elements.UUID: http://zoobank.org/798eb5f9-ad15-4d90-bc6a-ff22ee936438

中文翻译：

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来自南亚美尼亚区块的下法门阶（上泥盆统）rhynchonellide 和 athyride 腕足类动物

下法门'环螺类'奥贝利亚努斯由 Abrahamyan（1957 年）在亚美尼亚建立的腕足类动物区（与克雷皮达conodont Zone）包含丰富多样的腕足动物群，但研究仍然很少。为了修订和更新其系统分类并评估在弗拉斯尼亚末期 Kellwasser 灭绝事件后该地区的腕足动物多样性，我们的注意力集中在 rhynchonellides 和 athyrides 上。六个 rhynchonellide 物种被描述为属于五个属以及一个单一的 athyride 物种（假球刺梨n. sp.)，这对科学来说是新的。属克里尼萨里纳首次在南亚美尼亚区块（SAB）报道，该区块当时是冈瓦纳北部边缘的一部分。一些已确定的 rhynchonellides 以前在该地区得到认可，但它们需要现代文献和分类学重新评估。更特别的是，它的内部结构是第一次沙丁鱼(Reed, 1922) 说明，考虑到它是具有生物地层意义的法门尼亚属的典型物种。最古老的点状 rhynchonellide 物种之一，外高加索格雷拉Erlanger, 1993 首次从亚美尼亚描述，其种内形态变异性被定量记录。从古生物地理学的角度来看，所研究的腕足动物群显然与冈瓦南北部边缘其他地区的同时代动物群具有相似性，这些地区从 SAB 向东延伸到阿富汗和帕米尔，尽管也有一些地方性元素。UUID：http://zoobank.org/798eb5f9-ad15-4d90-bc6a-ff22ee936438