Over the course of their long research history, a plethora of scientific names have been applied to the different species of apes (Hominoidea). Although numerous authors, past and present, have attempted to reconstruct hominoid nomenclatural history in detail, it appears that parts of it, mostly concerning the lesser apes or gibbons, still remain overlooked. Here I show that Simia Nanodes Lichtenstein, 1791 is a senior synonym of Simia Moloch Audebert, 1797, otherwise regarded as the oldest binomen applicable to the Javan gibbon. However, since Simia Nanodes failed to enter common usage, these names are subject to a reversal of precedence as defined by Article 23.9 of the International Code of Zoological Nomenclature. Simia Moloch Audebert, 1797 must be maintained as a nomen protectum , resulting in Hylobates moloch (Audebert, 1797) staying the valid name of the species . Simia Nanodes Lichtenstein, 1791 is declared a nomen oblitum . In compliance with this, I provide a complete scientific synonymy of the Javan gibbon and comment on its early research history.

中文翻译：

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优先顺序颠倒：爪哇长臂猿最古老的名称和该物种的完整同义词

在他们漫长的研究历史过程中，大量的科学名称被应用于不同种类的猿（人科动物）。尽管过去和现在的许多作者都试图详细重建人科动物的命名历史，但其中的部分内容，主要是关于较小的猿或长臂猿，似乎仍然被忽视了。在这里，我展示了 Simia Nanodes Lichtenstein, 1791 是 Simia Moloch Audebert, 1797 的高级同义词，否则被认为是适用于爪哇长臂猿的最古老的双名目。然而，由于 Simia Nanodes 未能进入普遍使用，根据《国际动物命名法典》第 23.9 条的定义，这些名称的优先级会被颠倒。Simia Moloch Audebert, 1797 必须作为 nomen protectionum 进行维护，导致 Hylobates moloch (Audebert, 1797) 保留物种的有效名称。Simia Nanodes Lichtenstein, 1791 被宣布为 nomen obtum 。根据这一点，我提供了爪哇长臂猿的完整科学同义词，并对其早期研究历史进行了评论。