Trouessartia Canestrini, 1899

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 : 4

Genus Trouessartia Canestrini, 1899

Type species: Dermaleichus corvinus Koch, 1841 , by subsequent designation.

To date, nineteen species of Trouessartia have been known to be restricted to swallows and martins ( Passeriformes : Hirundinidae ). Diversity and host associations of this grouping of mites have been most extensively explored in the Old World, especially in Europe and Africa, where 18 species were recorded ( Santana 1976; Gaud & Atyeo 1986, 1987). Reports of Trouessartia species occurring on swallows in the New World are rather scanty. In total, 7 species have been recorded so far from hirundinids in this part of the world and only one of them, Trouessartia stelgidopteryx Mironov and Overstreet, 2016 , is a New World endemic, while remaining species are distributed in both hemispheres ( Černý 1967; Forrester & Spalding 2003; Galloway et al. 2014; Mironov & Overstreet 2016).

Trouessartia species associated with hirundinids do not constitute a uniform morphological grouping. Most of previously known mites belong to two species groups, appendiculata (8) and minutipes (9); T. crucifera Gaud, 1957 is a single representative of the crucifera group, and T. stelgidopteryx has not been assigned to any group.

In the present work, we establish a new species group, stelgidopteryx , which includes 3 of 5 new species described herein, we provide uniform diagnoses for all four species groups and present a key to Trouessartia species presently recorded or expected on hirundinids in North America ( Canada and USA).