"A new synonymy, L. bidentis Schenk, 2013 = L. boileaui, is proposed."

Revision of the Lucanus boileaui group and notes on L . takeoi Adachi, 2020 from the L . maculifemoratus group (Coleoptera: Lucanidae: Lucaninae)
https://www.mapress.com/zt/article/view/zootaxa.5263.2.4