Megabothris walkeri (Rothschild, 1902)

Ceratophyllus walkeri Rothschild, 1902: 225 .

Records in Baltic States: Estonia (Vilbaste 1959; Daiter 1961a; Pototski 1989; 1990b; Pototski et al. 1993), Latvia (Eglitis 1957; Lapina 1959; Grinbergs 1960; 1961a; 1961d; 1964; 1976; Andersone 1963), Lithuania (Likevičienė 1957; Kadytė 1964; Arnastauskienė et al. 1989; Lipatova & Paulauskas 2010; Lipatova 2015; current study).

Hosts: S. araneus (LV, LT), A. agrarius (LV, LT), A. flavicollis (LV, LT), M. minutus (LT), M. musculus (LT), R. norvegicus (LV), A. oeconomus (LT), A. amphibius (LV), C. glareolus (EE, LV, LT), M. agrestis (EE, LV, LT), M. arvalis (LV, LT) .

Host specificity: moderately specific parasite of voles of the genus Microtus (S i = 0.75).

European distribution: Austria, Belarus, Belgium, Czech Republic, Denmark, Finland, France, Germany, the Netherlands, Norway, Poland, Romania, Russia, Slovakia, Switzerland, Ukraine, the United Kingdom (Rosický 1944; Séguy 1944; Cooreman 1950; Smit 1962; 1967; 1969; Mehl 1967; Adamovich 1971; Suciu 1973; Weidner 1973; George 1974; Chikilevskaya 1977; Haitlinger 1977b; 2011; 2015; Libois 1979; Vashchonok 1996; Striese et al. 2012; Baláž & Zigová 2020).