Trichuris ovis and Trichuris globulosa: Morphological, Biometrical, and Genetic Studies

Characterization of the complete mitochondrial genomes of two whipworms Trichuris ovis and Trichuris discolor (Nematoda: Trichuridae)

“…Adult samples representing T. discolor were obtained from the caecum of wild yak during surgery in Noel Cover Grassland in Sichuan Province, China. The whipworms were washed in physiological saline, identified preliminarily to species based on host preference, morphological characters and predilection sites (Cutillas et al, 1995;Callejón et al, 2012), fixed in 70% (v/v) ethanol and stored at À20°C until use.…”

“…spicule and pericloacal papillae) (Cutillas et al, 1995;Robles, 2011). However, it is not always possible to unequivocally identify and sufficiently differentiate between congeners based on these criterion of adult worms alone (Chandler, 1930;Cutillas et al, 2009).…”

Taxonomy and phylogeny of Trichuris globulosa Von Linstow, 1901 from camels. A review of Trichuris species parasitizing herbivorous

“…However, these authors identified, morpho-153 logically, all females as T. globulosa, while only one male as T. ovis. According to these authors, four species of Trichuris are known to 155 parasitize in the caecum of sheep and goats in Europe: T. ovis, T. globulosa, T. skrjabini and Trichuris capreoli (Artjuch, 1948; Barth 157 and Dollinger, 1975;Baruš et al, 1977Baruš et al, , 1978 Špakulová, 1994;Cutillas et al, 1995Cutillas et al, , 1996Cutillas et al, , 2004; Oliveros et al 2000; Callejón 159 et al, 2009; Callejón et al, 2012). In summary, the taxonomy of Trichuris species parasitizing her-161 bivorous remains unclear.…”

“…Trichuris species(Skrjabin et al, 1957;Cutillas et al, 1995).418 From the literature, the length of spicule for T. discolor has been 419 reported as 1.7 mm(Baer, 1950), 1.7-2.3 mm(Knight, 1971), 420 1.72-1.84 mm(Noda, 1955) 1.5-2.02(Sarwar, 1959), or 421 1.75-1.99 mm(Tenora et al, 1992). Furthermore,Knight (1974) 422 and lately Rickard and Bishop (1991) proposed a key to species 423 of Trichuris based on spicule length greater than 5 mm 424 (T. ovis = 5.69; T. tenuis = 7.2, Oliveros et al, 2003; Rickard and 425 Bishop, 1991, respectively) or spicule length less than 5 mm 426 (T. discolor).…”

Nematodes of the Genus Trichuris (Nematoda, Trichuridae), Parasitizing Sheep in Central and South-Eastern Regions of Ukraine

“…Most of morphological parameters (size and shape of body; length and shape of spicule, spicule sheath, and the spines that cover it; shape and structure of vulva and several metric parameters of vulvar formations), mentioned by other scientists (Barus et al, 1977, Barus et al, 1978Cutillas et al, 1995;Callejón, 2015), were used in species identifi cation. However, the morphological similarity of T. ovis and T. skrjabini females, and that of T. globulosa and T. ovis males, and also the fact that it is not always possible to isolate both males and females of one species inspired us to obtain new data on the signifi cantly diff erent morphometric characteristics of males and females of studied Trichurus species.…”