Oligonychus nielseni The genus Oligonychus Berlese (Acari, Prostigmata, Tetranychidae): taxonomic assessment and a key to subgenera, species groups, and subgroups Mushtaq, Hafiz Muhammad Saqib Alatawi, Fahad Jaber Kamran, Muhammad Flechtmann, Carlos Holger Wenzel ZooKeys 2021 2021-12-22 1079 89 127 496NB 51A80CFB-12D5-56B1-8BD2-54C2EDA7399B Reeves, 1963 Reeves 1963 Arachnida Tetranychidae Oligonychus CoL Animalia Oligonychus nielseni Trombidiformes 0 89 Arthropoda species nielseni   Oligonychus nielseniReeves, 1963: 57.  Host and distribution.   Pinus strobus( Pinaceae); United States.  Remarks.   Oligonychus nielseniReeves was described from only females, and details of the male were absent in both the original ( Reeves 1963) and subsequent description ( Baker and Tuttle 1994). The species was not specifically compared with any other closely related  Oligonychusspecies ( Reeves 1963). Moreover, variations have been reported in length of dorsocentral setae of the females from different populations, e.g., c1reaching to bases of e1( Reeves 1963) or c1shorter than the interval between c1-e1( Baker and Tuttle 1994). The species identity of  O. nielseniwill be resolved after collecting and describing the male from the type host and locality.