Gobius ricasolii was described in 1935 by Di Caporiacco from the lower Küçük Menderes River drainage in Turkey. This species has not yet been listed as a freshwater fauna of Turkey. Ahnelt (1995) described Knipowitschia ephesi from the same locality based on materials collected by Curt Kosswig in 1948. We examined the type materials of G. ricasolii to clarify its taxonomic status and identified it as a member of the genus Knipowitschia. Since morphological, morphometric and meristic characteristics of K. ephesi overlap largely with those of K. ricasolii, we consider K. ephesi as a junior synonym of K. ricasolii. A revised diagnosis of this species is presented.

中文翻译：

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Knipowitschia ephesi Ahnelt, 1995, Gobius ricasolii Di Caporiacco, 1935 (Teleostei: Gobiidae) 的初级同义词

Gobius ricasolii 于 1935 年由 Di Caporiacco 描述，来自土耳其 Küçük Menderes 河下游。该物种尚未被列为土耳其的淡水动物群。Ahnelt (1995) 根据 Curt Kosswig 于 1948 年收集的材料描述了来自同一地区的 Knipowitschia ephesi。我们检查了 G. ricasolii 的类型材料以阐明其分类地位，并将其确定为 Knipowitschia 属的成员。由于 K. ephesi 的形态学、形态计量学和分生特征与 K. ricasolii 的特征在很大程度上重叠，我们认为 K. ephesi 是 K. ricasolii 的初级同义词。提出了对该物种的修订诊断。