Nosomma monstrosum (Nuttall and Warburton, 1908)

Nosomma monstrosum is an unusual species which was originally classified, with reservations, as a Hyalomma, although it also shows certain characteristics of the genus Dermacentor (Nuttall and Warburton 1908; Warburton 1918). It does not possess the elongate mouthparts and beady eyes of Hyalomma but does possess enamelling and male ventral shields (Schulze 1920). Adult N. monstrosum are most commonly found on buffalo, although they have also been recorded from cattle, horses, pigs and dogs (Hoogstraal 1985b; Petney and Keirans 1996b). Immatures occur mainly on rodents. This species is found in Lao PDR, Myanmar, Thailand, and Vietnam (Toumanoff 1944; Tanskul et al. 1983; Hoogstraal 1985b; Kolonin 1992, 2009), as well as India, Nepal, Sri Lanka and Bangladesh (Kolonin 2009). The life cycle has been determined for a Sri Lankan population of this species (Bandaranayaka et al. 2016).

Descriptions of adults are found in Arthur and Chaudhuri (1965) and immatures in Singh (1968).