Redefinition of Liroetis, with descriptions of two new species and an annotated list of species (Coleoptera: Chrysomelidae: Galerucinae)

Bezděk Jan
Acta Entomologica Musei Nationalis Pragae 61(2): 529-614, 2021
Published online: 31st December 2021
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Abstract: The genus Liroetis Weise, 1889 is redefined. The following new synonymies are established: Liroetis Weise, 1889 = Siemssenius Weise, 1922, syn. nov. = Pseudoliroetis Laboissière, 1929, syn. nov. = Zangia Chen, 1976, syn. nov. Consequently, the following new combinations are proposed: Liroetis coeruleus (Jiang, 1990) comb. nov.; Liroetis latispinus (Chen, 1976) comb. nov.; Liroetis nigricollis (Jiang, 1990) comb. nov.; Liroetis pallidulus (Jiang, 1990) comb. nov. (all from Zangia); Liroetis nigropictus (Fairmaire, 1889) comb. nov. (from Leptarthra); Liroetis cheni (Lee, 2016) comb. nov.; Liroetis elongatus (Kimoto, 1977) comb. nov.; Liroetis jeanvoinei (Laboissière, 1929) comb. nov.; Liroetis jungchani (Lee, 2016) comb. nov.; Liroetis liui (Lee, 2016) comb. nov.; Liroetis metallipennis (Chûjô, 1962) comb. nov.; Liroetis modestus (Weise, 1922) comb. nov.; Liroetis nigriceps (Laboissière, 1929) comb. nov.; Liroetis rufipennis (Chûjô, 1962) comb. nov.; Liroetis sulcipennis (Zhang & Yang, 2008) comb. nov.; Liroetis tsoui (Lee, 2016) comb. nov.; and Liroetis yuae (Lee, 2016) comb. nov. (all from Siemssenius). Two new species, Liroetis aurantiacus sp. nov., from continental South East Asia, and L. baolocanus sp. nov., from Vietnam, are described. A new substitute name, Liroetis medvedevi nom. nov., is proposed for L. nigricollis Medvedev, 2009 preoccupied by L. nigricollis (Jiang, 1990). The following new synonyms are established: Liroetis aeneipennis Weise, 1889 = L. tiemushannis Jiang, 1988, syn. nov.; Liroetis ephippiatus Laboissière, 1930 = Zangia signata Jiang, 1990, syn. nov. = L. postmaculatus Lopatin, 2004, syn. nov.; Liroetis leechi Jacoby, 1890 = L. verticalis Jiang, 1988, syn. nov.; Liroetis nigricollis (Jiang, 1990) = L. unicolor Zhang, Li & Yang, 2008, syn. nov.; Liroetis reitteri (Pic, 1934) = Pseudoliroetis trifasciata Jiang, 1992, syn. nov. The spelling of Liroetis tiemushannis Jiang, 1988 is fixed using the First Reviser Principle. Species of Liroetis are divided into five species-groups based on the combination of the following characters: presence/absence of border on anterior pronotal margin, width/length ratio of pronotum, structure of aedeagus, presence/absence of metatibial spur. The established groups are: the aeneipennis group, the aurantiacus group, the flavipennis group, the fulvipennis group, and the grandis group. The gender of Liroetis is masculine.
Key words: Coleoptera, Chrysomelidae, Galerucinae, Liroetis, Siemssenius, Pseudoliroetis, Zangia, new combination, new name, new species, new synonymy, nomenclature, taxonomy, Oriental Region, Palaearctic Region
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