A new species of the subgenus Idopterum Hampson, 1894 of the genus Ammatho Walker, 1855 from China (Lepidoptera: Erebidae: Arctiinae: Lithosiini), with redefinition of the subgenus Idopterum. Zootaxa, 4885(2), Nov 25 2020: 271-276. 273 [Zoological Record Volume 157]