In this study, we test and corroborate the phylogenetic position of Heterosyphus within Helictopleurus using mitogenomes and nuclear loci. Our recent samplings revealed that males of the former Heterosyphus sicardi Paulian, 1975 (today under Helictopleurus d’Orbigny, 1915) have extraordinary bilateral clypeal horns which are exclusive within the genus. We provide a taxonomic review of the fungicola species group of Helictopleurus and discuss the systematic position of H. sicardi within the group. The male phenotype of H. sicardi is described and photographs of the body and genitalia of the members of the fungicola group are given, as well as a diagnostic key to species of the group. Helictopleurus fungicola peyrierasi is considered to be a distinct species within the genus (H. peyrierasistat. rest.). Helictopleurus pluristriatus d’Orbigny, 1915 syn. nov. is established as a junior synonym of H. fungicola (Fairmaire, 1899).

中文翻译：

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基因组测序揭示了马达加斯加粪甲虫属Helictopleurus（鞘翅目、金龟亚科）非凡的头角：来自真菌物种组修订的见解


在这项研究中，我们使用丝裂基因组和核位点测试并证实了 Helictopleurus 中 Heterosyphus 的系统发育位置。我们最近的采样显示，前Heterosyphus sicardi Paulian，1975年的雄性（今天的Helictopleurus d'Orbigny，1915年）具有非凡的双侧clypeal角，这是该属独有的。我们对 Helictopleurus 真菌菌种组进行了分类学回顾，并讨论了 H. sicardi 在该组中的系统地位。描述了 H. sicardi 的雄性表型，并给出了真菌组成员的身体和生殖器照片，以及该组物种的诊断要点。 Helictopleurus fungucola peyrierasi 被认为是该属中的一个独特物种（H. peyrierasistat.rest.）。 Helictopleurus pluristriatus d'Orbigny, 1915 syn.十一月被确定为 H. fungucola 的初级同义词（Fairmaire，1899）。