Abstract: Agrilus (Quercuagrilus) ziegleri Niehuis, 2006 syn. n. is established as a new junior subjective synonym of A. (Q.) relegatus Curletti, 1990. The revision of the specimens reported as belonging to A. (Q.) curtulus Mulsant et Rey, 1863 from Bulgaria shows that they belong to A. (Q) litura Kiesenwetter, 1857. Agrilus (Q.) curtulus is not distributed in Bulgaria. Key to all 10 representatives of subgenus Quecuagrilus in Bulgaria is presented. Agrilus (Q.) sulcicollis Lacordaire, 1835 is also included in the key because it is distributed on the Balkan Peninsula closest to Bulgaria in North Macedonia and Romania and it is possible to collect it in Bulgaria as well.
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Additional information
Received: 14 March 2026 · Accepted: 8 April 2026
Editor: Stanislav Abadjiev
Conflicts of interest:
No potential conflict of interest has been reported by the authors, reviewers, or subject editor.
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