A taxonomic review of the genus Junnanotrechus Uéno & Yin, 1993 (Coleoptera: Carabidae: Trechinae), with description of six new species

Abstract

Six new species of the genus Junnanotrechus Uéno & Yin, 1993 are described from Yunnan Province, southern China: J. wrasei sp. n. (from the Diancang Shan Mt. R.), J. triporus sp. n. (from the mountains east of Weishan), J. schuelkei sp. n. (from the Ailao Shan Mountain Range), J. elegantulus sp. n. (from the Daxueshan Mount east of Mengsa Town), J. oblongus sp. n. (from the Daxueshan Mount west of Niutoushan Village), J. koroleviellus sp. n. (from the mountains west of Yunxian Town). New taxa discovered allow a more precise definition of diagnostic characters for the genus. All species were extensively measured and morphometric indices are given. The members of the genus are keyed and their known distribution is mapped. Geographic patterns in transformations of major character states suggest the center of dispersal for members of the genus was, most likely, somewhere in the valley of the Mekong (=Lancang Jiang) River west of the Ailao Shan Mountain Range.

Three new species of the genus Trechus Clairville, 1806 from Sichuan (Coleoptera: Carabidae: Trechini)

“…Twenty specimens, if available, were measured for each geographical locality. Measurements used here are the same as in our previous articles [e.g., Belousov, Kabak, 2000, 2003, 2014, 2019b. The body length was measured without mandibles, from the anterior margin of labrum to the elytral apex, the width of the pronotal baseat the narrowest point, i.e., without hind angles if these are protruding.…”

A new genus of trechine beetles, Puertrechus gen. n., with two new species and a new species of Dactylotrechus Belousov et Kabak, 2003 from Southern China (Coleoptera: Carabidae: Trechinae)

“…According to this author, this lineage includes apart from Kozlovites caviceps Jeannel, 1935 and Queinnectrechus, one more genus, Deuveotrechus S. Uéno, 1995 established by him (Uéno, 1995) for Kozlovites yuae and Stevensius gregoryi Jeannel, 1937(Jeannel, 1937. Despite the obvious heterogeneity of the Agonotrechus series (Belousov & Kabak, 2014), the Kozlovites lineage of its own seems to be a well defined natural group of trechines. Despite unusual shape of the pronotal hind angles, Queinnectrechus demonstrate clear affinities with its members in some important characters, including: elongate ovate body, rather long tempora, strong constriction of the pronotal base, lateral border of the pronotum more or less reduced posteriorly, and increased number of the discal setiferous pores on the elytra typical of most members of the genus (Belousov & Kabak, 2003).…”