Trouessartia appendiculata (Berlese, 1886)

Mironov, Sergey V. & Galloway, Terry D., 2019, Feather mites of the genus Trouessartia Canestrini (Acariformes: Trouessartiidae) from swallows (Passeriformes: Hirundinidae) in Canada, Zootaxa 4568 (1), pp. 1-39 : 5

Group appendiculata

Diagnosis. Both sexes. Hysteronotal setae d2, e2 present. Setae c2 long, spiculiform. Setae sR of trochanters III spiculiform, usually longer than tarsi I, II and slightly enlarged in basal part. DHA present. Male. Opisthosoma strongly attenuate posteriorly, opisthosomal lobes fused along midline forming heavily sclerotized median septa, only distal ends of lobes separated by narrow terminal cleft not extending beyond level setae h2. Epimerites IVa present, with anterior ends not extending to genital apparatus. Paragenital apodemes absent. Translobar apodemes present. Terminal lamellae ovate and attenuate apically ( Figs. 3E , 16A ) or enlarged with concave posterior margin and shaped as a fish-tail ( Fig. 16D ). Female. Setae f2 present.

Remark. The group currently incorporates 9 species, including one described herein; 3 species have been recorded in the New World ( Santana 1976; Gaud & Atyeo 1986). Included species: Trouessartia ampulicaudata sp. n., T. appendiculata (Berlese, 1886) , T. exima Gaud and Atyeo 1986 , T. gladifera Gaud and Atyeo 1986 , T. longiseta Gaud & Atyeo 1986 , T. modesta Gaud and Mouchet, 1958 , T. piscicauda Gaud, 1957 , T. santanai Gaud and Atyeo, 1986 , and T. sophiae Gaud and Atyeo, 1986 .

Figures

FIGURE 3. Trouessartia ampulicaudata sp. n., details. A, B—genu, tibia and tarsus I and II of male, respectively, C, D—tibia and tarsus III and IV of male, respectively, E—genital apparatus and opisthosoma of male, ventral view, F—setae si, c2, c3 and sRIII of male, G—tibia and tarsus IV of female, H—spermatheca and spermaducts, I—external copulatory tube of female, dorsal view. Abbreviations: ad—adanal apodeme, ae—tip of aedeagus, bs—basal sclerite, co—copulatory opening, eaepiandrum, epIVa—epimerite IVa, hs—head of spermatheca, is—intermedial sclerite, lg—latigenital sclerite, pd—primary spermaduct, pm—paramere, sd—secondary spermaduct, tl—terminal lamella.

FIGURE 16. Trouessartia species, details of males. Trouessartia appendiculata: A—ventral view of genital apparatus and opisthosoma, B—tibia and tarsus IV, C—setae si, c2, c3 and sRIII; Trouessartia piscicauda: D—ventral view of genital apparatus and opisthosoma, E—tibia and tarsus IV, F—setae si, c2, c3 and sRIII.