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Chaetotaxy is an important character especially in mites and can be applied in species diagnosis, phylogenetics, ontogeny, and so on. Chaetotaxic ontogeny of Bdella was carried out through comparing both immature and adult descriptions of eight Bdella species, including a new species, B. xinisp. nov., from China. Based on these species, chaetotaxy changes in Bdella mainly focused on ventral hypostomal setae (vh), setae on palpal basifemur, aggenital setae (ag), genital setae (g), anal setae (ad) and leg setae. [ABSTRACT FROM AUTHOR]

A new species, Coprocarpais maximus Yao & Jin sp. nov., is described based on deutonymph and female samples from Hainan provinces, China. An identification key to the known species of Coprocarpais is provided. [ABSTRACT FROM AUTHOR]

A new species of genus Pseudoscirus Wurlitzer & Rocha, 2021, P. menglaensis Chen & Jin sp. nov. is described, which represents a newly recorded genus Pseudoscirus to China. And a key to species (adult females) of Pseudoscirus is given in the world. [ABSTRACT FROM AUTHOR]

A known species, Scirula papilataLin, 1997 based on samples collected from Hubei Province, China, is redescribed with the detailed illustration and the first description of males. [ABSTRACT FROM AUTHOR]