Ontogenetic development and redescription of Oligonychus metasequoiae (Acari: Tetranychidae) 

Abstract

Oligonychus metasequoiae Kuang, 1992 is redescribed based on the larva, protonymph, deutonymph and adult male and female specimens from China. The ontogenetic development of chaetotaxy in O. metasequoiae and the number and position of solenidia on tibia I are discussed. Patterns of setal addition on legs I–IV from larvae to adults in this species are different from the basic pattern of the Tetranychinae outlined by Lindquist.

The genus Oligonychus Berlese (Acari, Prostigmata, Tetranychidae): taxonomic assessment and a key to subgenera, species groups, and subgroups

“…Lindquist (1985) and Seeman and Beard (2011) use homologies and state that "two pairs of para-anal setae h 2 and h 3 , are consistently present in Oligonychus and related genera". Many authors have followed the work of Lindquist (1985), and also consider setae h 1 to be absent, and h 2 and h 3 to be present in Oligonychus (Beard et al 2003(Beard et al , 2008Kamayev 2017;Li et al 2017Li et al , 2018Li et al , 2019Arabuli and Gotoh 2018;Khanjani et al 2018). Pritchard and Baker (1952) originally assumed that seta h 1 (clunal) was present or absent, with two pairs of para-anal setae present; however, Prtichard and Baker (1955) altered this view and assumed the clunal setae to always be present.…”

Redescription of Bryobia pritchardi Rimando, 1962 (Acari: Tetranychidae), with an ontogeny of chaetotaxy

“…Recently great importance has been attached to understanding the patterns of setal additions throughout ontogenetic development of the Tetranychoidea (Khanjani et al 2018;Seeman et al 2017;Li et al 2018Li et al , 2017Xu et al 2017;Yi et al 2017Yi et al , 2013De Castro et al 2015;Beard & Ochoa 2010;Beard & Walter 2010). There are few scholars who have payed attention to the ontogenetic patterns for species of Bryobia.…”