Six new species of the subgenus Habronychus (Habronychus) (Coleoptera: Cantharidae) from the Oriental region, with key to species

Six new species of Habronychus (Habronychus) Wittmer, 1981 are described, including H. (H.) laticeps Y. Yang, Ge & X. Yang, sp. n., H. (H.) honestus Y. Yang, Ge & X. Yang, sp. n., H. (H.) crassatus Y. Yang, Ge & X. Yang, sp. n. and H. (H.) tengchongensis Y. Yang, Ge & X. Yang, sp. n. from China, and H. (H.) longiplatus Y. Yang, Ge & Liu, sp. n. and H. (H.) trianguliceps Y. Yang, Ge & Liu, sp. n. from Vietnam. In addition, a previously known species, H. (H.) parallelicollis (Pic, 1921), is redescribed. The above species are illustrated with habitus photographs, aedeagi, abdominal sternites VIII and internal genitalia of females. Key for identifi cation of the species of this subgenus worldwide is provided. ZooBank Article Registration: http://zoobank.org/urn:lsid:zoobank.org:pub:D21B030C-3BE4-400C-B045-8BAC4650FA65 * Corresponding authors. INTRODUCTION The genus Habronychus was established by Wittmer (1981), with Anolisus rubicundus Champion, 1926 designated as the type species (Okushima & Satô, 1999). There was a controversy about the validity of Habronychus as the generic name (Brancucci, 2007), which was resolved by Kopetz (2008). At present, it is divided into three subgenera (Kazantsev & Brancucci, 2007). The nominate subgenus includes 15 species widely distributed in the Oriental and south eastern Palaearctic regions (Wittmer, 1981, 1982a, b; Ishida, 1986; Satô, 1986; Okushima & Satô, 1999; Švihla, 2004, 2005; Kazantsev & Brancucci, 2007; Kopetz, 2008), Macrohabronychus Wittmer, 1981 includes 11 species restricted to the Himalayan area (Kopetz, 2008; Yang et al., 2010) and Monohabronychus Okushima & Satô, 1999 is composed of 5 species endemic to Taiwan (Okushima & Satô, 1999; Kazantsev & Brancucci, 2007; Satô et al., 2014). The members of Habronychus can be distinguished from all other genera of Cantharinae by the small to middlesized and slender body, head with a pair of smooth impressions behind the antennal sockets, subquadrate pronotum, which is much narrower than head in the male, oval-shaped aedeagus which is deeply cleft ventrally and separated Eur. J. Entomol. 119: 201–214, 2022 doi: 10.14411/eje.2022.022