Two new species of Tydeidae ( Acari : Prostigmata ) , records of species of this family and Triophtydeidae from Brazil

Two new species of Tydeidae are described, Brachytydeus lorenzatus sp. nov. and Quasitydeus feresi sp. nov. Brachytydeus lorenzatus sp. nov. differs from B. aegyptiaca (Rasmy & El Bagoury, 1979) by having a reticulated area on the region of f1 and f2, dorsal setae smooth, solenidion vI shorter than or equal to the width of tarsus I, most setae on dorsal shield shorter than the length between their bases and setae d forked distally. The new species is distinguished from B. scutatus Silva, Rocha & Ferla, 2013 by having a slightly reticulate area on the aspidosoma, near setae bo, all dorsal setae slender and club-shaped. Quasitydeus feresi sp. nov. differs from the only other species of the genus, Q. ricensis (Baker, 1970), by having all dorsal setae simple and serrated, similar in shape. Eleven tydeoid species are reported also from several plants native to the state of Rio Grande do Sul, Brazil. This is the second species of Brachytydeus Thor, 1931 described from and the second species described for Quasitydeus Kazmierski, 1996.

Mites were collected from plants by hand with a finetipped paintbrush and were mounted with Hoyer's medium on microscopic slides (Jeppson et al. 1975).They were dried on a slide warming plate, ringed with nail polish and their morphological details were studied under a phase contrast microscope.Drawings were made using a camera lucida and the lines were digitized using Corel Draw X5 ® .For the descriptions, dorsal setal notations follow KaxmiersKi (1989) and those of the venter, gnathosoma, leg setae and lyrifissures follow andré (1981a, b).Species were identified using the keys of KaxmiersKi (1996KaxmiersKi ( , 1998) ) and silva et al. (2013).Measurements are given in micrometers (μm) and measurements of the holotypes or illustrated specimens are shown in bold followed by the mean and range in parentheses.The legs were measured from the base of the trochanter to the end of the apotele.
Voucher specimens of each species were deposited in the mite reference collection of the Museu de Ciências Naturais of Centro Universitário UNIVATES (ZAUMCN), Lajeado, Rio Grande do Sul.

TAXONOMY
Eleven tydeoids were on several native plants.They belong to six genera of Tydeidae within the Tydeinae (eight species), Pretydeinae (two species) and one species of the Triophtydeidae.The most abundant genus was Brachytydeus (four species), followed by Tydeus (three species) and Pretydeus (two species).
Distribution.This species was described from Tithonia speciosa Goldfinger, Democratic Republic of Congo.This is the first record from Brazil.
Distribution.This species was described from Fraxinus sp. in Crimea.This is the first record from Brazil.
Remarks.Based on andré (1981a, b), the chaetotaxy of the legs and genital parts are the most important characters in the identification of genera and species.The classification of the new species in Quasitydeus is consistent with the following characters it displays: absence of setae on trochanter III, femur II with three setae and femur III with one seta (KaxmiersKi 1998).