Museum of Natural History, University of Wrocław, Sienkiewicza 21, 50-335 Wrocław, Poland..
Zootaxa. 2021 Mar 2;4938(4):zootaxa.4938.4.7. doi: 10.11646/zootaxa.4938.4.7.
Scydmoraphes yunnanensis Jałoszyński shows several unusual characters as for a member of this broadly distributed Palaearctic genus. Discovery of this species in a new locality and several newly available specimens allowed for detailed morphological study. As a result, a new genus, Sinonichnus gen. n., is established to accommodate Sinonichnus yunnanensis comb. n., and another species, showing unusual modifications of the male antennae, Sinonichnus leiodicornutus sp. n. Both species are known to occur in Yunnan, China. Sinonichnus is the first known Stenichnini genus that combines the presence of the pre-tentorial gular sutures with the prosternum laterally fused with inner regions of hypomera; all remaining world genera that show the gular sutures between posterior tentorial pits and the posteromesal margins of cardines have the prosterna demarcated laterally by notosternal sutures. An updated identification key to Eurasian Stenichnini genera whose adults have the pre-tentorial gular sutures is given.
云南宽缘叶甲属 Scydmoraphes yunnanensis Jałoszyński 表现出一些不寻常的特征，这使其与广泛分布于古北界的该属成员有所不同。在新地点发现该种，以及获得一些新标本，使我们能够进行详细的形态学研究。结果，建立了一个新属，Sinonichnus 属，以容纳 Sinonichnus yunnanensis comb. n.，以及另一种具有雄性触角异常形态的物种 Sinonichnus leiodicornutus sp. n. 这两个种均已知分布于中国云南。Sinonichnus 是第一个已知的 Stenichnini 属，它结合了前幕骨颈沟的存在与侧方与侧板内区融合的胸盾片；所有具有幕骨后隐窝与后侧头盾后缘之间颈沟的其他世界属，其胸盾都由侧胸骨缝在侧方界定。给出了具有前幕骨颈沟的欧亚 Stenichnini 属成虫的更新鉴别特征。
