Four new species of earthworms belonging to the genus Amynthas (Oligochaeta: Megascolecidae) from Diaoluo Mountain, Hainan Island, China

摘要

Four new species of earthworms belonging to the genus Amynthas (Oligochaeta: Megascolecidae) from Diaoluo Mountain, Hainan Island, China. - This paper describes four new species of earthworms from Hainan Island, China: Amynthas diaoluomontis sp. nov., Amynthas octopapillatus sp. nov., Amynthas zhangi sp. nov. and Amynthas lingshuiensis sp. nov. All four species have two pairs of spermathecal pores in 5/6-6/7, simple paired caeca from XXVII and some papillae in the male pore region. The four new species are easily distinguished from other similar Amynthas species, especially those of the provisional morrisi species-group.