Ontogenetic development and redescription of Eotetranychus xuzhouensis (Wang and Ma 1987) comb. nov. (Acari: Tetranychidae)

Platytetranychus xuzhouensis Wang and Ma 1987 is redescribed and combined as Eotetranychus xuzhouensis (Wang and Ma) comb. nov. based on the protonymph, deutonymph, male and holotype female specimens from En-Pei Ma's collections. Eotetranychus xuzhouensis (Wang and Ma) comb. nov. can be distinguished from other members of Eotetranychus by the distinct shape of the aedeagus and tarsus I with one tactile seta proximal to duplex setae. The ontogenetic changes in leg chaetotaxy in Eotetranychus xuzhouensis (Wang and Ma) comb. nov. are given and discussed. Additional trends and reductive chaetotaxy of the leg segments suggest that Eotetranychus xuzhouensis (Wang and Ma) comb. nov. has its own basic larval-protonymphal pattern of setal additions.