Asca bicornis (Canestrini & Fanzago, 1877)

Gamasus (Sejus) bicornis Canestrini & Fanzago, 1877: 103 .

Laelaps bicornis .— G. Canestrini & R. Canestrini, 1882: 78.

Sejus bicornis .— Canestrini, 1885: 91.

Ceratozercon bicornis .— Berlese, 1913: 204; Halbert, 1923: 375.

Asca bicornis .— Buitendijk, 1945: 309; Willmann, 1949c: 112; Evans, 1958b: 584; Halaskova, 1959: 17; Ryke, 1961: 129; Schweizer, 1961: 137; Bernhard, 1963: 72; Hurlbutt, 1963: 495; Karg, 1965: 221; 1971b: 274; 1993: 283; Pinchuk, 1976: 54; Kalúz & Fenďa, 2005: 122; Gwiazdowicz, 2007: 61; Çakmak et al., 2011: 581; Kontschán & Ujvari, 2013: 79.

Asca (Asca) bicornis .— Karg, 1979b: 258.

Asca nova Willmann, 1939a: 246 (Synonymy by Willmann, 1949c: 112; Evans, 1958b: 584; Karg, 1993: 283).

Asca nova .— Womersley, 1956: 511; Ryke, 1961: 132; Hurlbutt, 1963: 495; Dziuba, 1972: 165.

Asca (Asca) nova .— Karg, 1979b: 258; Farrier & Hennessey, 1993: 28.

TYPE DEPOSITORY: of A. bicornis and A. nova: not stated.

TYPE LOCALITY AND HABITAT: of A. bicornis: Trentino, Italy, in moss; of A. nova: apparently in Leipzig, Germany, in soil.

NOTES: (a) Hurlbutt (1963: 495) considered A. nova not to be conspecific with A. bicornis; he also considered that the reports of A. bicornis by Halbert (1923: 375), Schweizer (1948: 27), Willmann (1949c: 112) and Halaskova (1959: 17) possibly referred to A. nova . We adopted the interpretation of Willmann (1949c: 112), Evans (1958b: 584) and Karg (1993: 283), considering A. nova to be a junior synonym of A. bicornis; (b) Specimens reported as Zercon bicornis by Berlese (1887b: 8) were re-identified as Asca aphidioides (Linnaeus, 1758) by Lindquist & Evans (1965: 42), Karg (1993: 282), Halliday et al. (1998: 17); (c) Farrier & Hennessey (1993: 26) mistakenly considered Gamasus (Seius) bicornis G. Canestrini & Fanzago, 1877 as a junior synonym of A. aphidioides, probably by not considering that Zercon bicornis (sensu Berlese, 1887b) not Gamasus (Seius) bicornis G. Canestrini & Fanzago, 1877 had been considered in the literature the same as A. aphidioides .