Stick insects from Vietnam: The new genus Mycovartes gen. nov., with two new species and two new species of Neooxyartes Ho, 2018 (Phasmida: Lonchodidae: Necrosciinae)

Two new species of Neooxyartes Ho, 2018 are described from Central Vietnam: N. minimus sp. nov. from Kon Ka Kinh National Park and N. neohiraseoides sp. nov. from Chu Yang Sin National Park. A new genus Mycovartes gen. nov. is described to accommodate Oxyartes vietnamensis Ho, 2018 resulting into the new combination Mycovartes vietnamensis (Ho, 2018) gen. et comb. nov. Two new species are described in the new genus: M. khoii gen. et sp. nov. from Chu Yang Sin and Ta Dung National Parks and M. montanus gen. et sp. nov. from Chu Yang Sin and Bidoup-Nui Ba National Parks. For all species, adults of both sexes, nymphs and eggs of wild and captive bred origin are described and figured. Pictures of living specimens, and distribution maps of the species of both genera are provided. The male vomer was dissected for all treated species and is described and figured. The relationship of the herein treated genera to closely related taxa is discussed and supported with recent phylogenetic studies.