Data from: Cucumis omissus sp. nov. (Cucurbitaceae) from southern Arabia and Ethiopia and its phylogenetic position

The new species Cucumis omissus Thulin from Yemen, Oman and Ethiopia is described and illustrated. According to phylogenetic analyses based mainly on nuclear ribosomal ITS sequences and chloroplast trnG sequences, the new species is sister to C. hastatus in Somalia and Ethiopia. A map showing the distributions of both C. omissus and C. hastatus is provided and morphological differences between these two species are pointed out. Cucumis omissus has been confused with C. pustulatus and C. prophetarum in the literature and in herbaria, and morphological differences from these two species are provided as well. Oreosyce africana is nested within Cucumis in this, as well as in several previous studies. We clarify that when O. africana is treated as a Cucumis, its correct name is C. subsericeus.本文对产自也门、阿曼与埃塞俄比亚的新种Cucumis omissus Thulin进行了描述与图示。基于以核核糖体转录间隔区（ITS）序列及叶绿体trnG序列为核心的系统发育分析结果，该新种与产自索马里及埃塞俄比亚的C. hastatus构成姊妹群。本文附带了一张展示C. omissus与C. hastatus分布范围的分布图，并阐明了这两个物种间的形态差异。此前文献及标本馆中，C. omissus曾被误定为C. pustulatus与C. prophetarum，本文同时列出了该新种与这两个物种的形态差异。Oreosyce africana在本研究及此前多项研究中均被发现嵌合于黄瓜属（Cucumis）的系统发育分支内。本文明确指出，若将O. africana归入黄瓜属，其合法学名为C. subsericeus。