2. Dermacentor andersoni Stiles, 1908 .

A Nearctic species, all of whose parasitic stages are usually found on Mammalia (several orders); rarely adults and nymphs have been found on Galliformes: Phasianidae . Dermacentor andersoni is a very frequent parasite of humans.

M: Marx (1897) in Neumann (1897), under the name Dermacentor venustus, suppressed to preserve the name Dermacentor andersoni, as explained in Keirans (1976)

F: Marx (1897) in Neumann (1897), under the name Dermacentor venustus

N: Hooker et al. (1912), under the name Dermacentor venustus

L: Stiles (1910)

Redescriptions

M: Banks (1908) and Hooker et al. (1912), both under the name Dermacentor venustus, Stiles (1908, 1910), Cooley (1938), Arthur (1960a), Brinton et al. (1965), Furman and Loomis (1984), Yunker et al. (1986), Lindquist et al. (2016)

F: Banks (1908) and Hooker et al. (1912), both under the name Dermacentor venustus, Stiles (1908, 1910), Cooley (1938), Arthur (1960a), Brinton et al. (1965), Furman and Loomis (1984), Yunker et al. (1986), Lindquist et al. (2016)

N: Cooley (1938), Arthur (1960a), Brinton et al. (1965), Furman and Loomis (1984), Yunker et al. (1986), Lindquist et al. (2016)

L: Hooker et al. (1912), under the name Dermacentor venustus, Cooley (1938), Arthur (1960a), Brinton et al. (1965), Furman and Loomis (1984), Yunker et al. (1986), Coley (2015), Lindquist et al. (2016)

Note: Dermacentor andersoni has been misidentified on several occasions and at localities around the world (Guglielmone et al. 2014, 2015, Guzmán-Cornejo et al. 2016). See Dermacentor occidentalis for a discussion of the difficulties involved in separating the nymph and larva of that species from the corresponding stages of Dermacentor andersoni . 3. Dermacentor asper Arthur, 1960a . A Palearctic species known only to parasitize Erinaceomorpha: Erinaceidae .

M: Arthur (1960a)

F: unknown

N: unknown

L: unknown

Redescriptions: none

Note: Teng and Jiang (1991) and Kolonin (2009) treat Dermacentor asper as a synonym of Dermacentor sinicus Schulze, 1931, but it is regarded as provisionally valid in Guglielmone et al. (2014, 2015).