Type host. This host was originally listed as Limosa novae-hollandiae by Johnston (1917). The identification of this bird could not be confirmed because we were not able to find a listing of this species from Australia. This godwit species may be the bar-tailed godwit, Limosa lapponica (Linnaeus) (Charadriiformes: Scolopacidae), but the black-tailed godwit, Limosa limosa (Linnaeus) (Charadriiformes: Scolopacidae), also is known from Australia. Allison (2001) reported W. taxorchis from a subspecies of bar-tailed godwit, Limosa lapponica baueri Naumann, from the South Island of New Zealand.
Type locality. Lord Howe Island, off Australia.
Additional hosts. Black-winged or common stilt, Himantopus himantopus (Linnaeus) (Syn. H. leucocephalus Gould) (Charadriiformes: Scolopacidae) and the common snipe, Gallinago gallinago (Linnaeus) (Charadriiformes: Scolopacidae)— Yamaguti (1958, 1971).
Previously proposed synonyms. Cyclocoelum wilsoni Harrah, 1922 (= W. wilsoni [Harrah, 1912]), Cyclocoelum triangularum Harrah, 1922 (= W. triangulare [Harrah, 1922]), Corpopyrum wilsoni (Harrah, 1922) (= W. wilsoni [Harrah, 1922]) and W. triangulare (Harrah, 1922) — Joyeux & Baer (1927).
Remarks. This species was originally described as Cyclocoelum taxorchis Johnston, 1917, but considered to be in Wardianum byYamaguti (1958, 1971). It was considered to be a synonym of Cyclocoelum (H.) tringae Stossich, 1902 (= Neohaematotrephus tringae [Stossich, 1902] n. comb.) by Dubois (1959) and of Haematotrephus lanceolatum (Wedl, 1858) by Macko & Feige (1960). No oral or ventral sucker described—Johnston (1917) and Bashkirova (1950).