Fig. 4From: First report of four rare strongylid species infecting endangered Przewalski’s horses (Equus ferus przewalskii) in Xinjiang, ChinaDifferential interference micrographs of Petrovinema skrjabini. A Anterior part of body, lateral view. Arrow marks anterior part of head, dorsoventral view (scale bar: 100 μm). B Tail of female (scale bar: 200 μm). Arrows at the anterior tip mark vagina. The arrow (horizontal arrow) in the middle marks vulva. Arrow at the posterior tip marks anus. C Male tail, lateral view (scale bar: 200 μm)Back to article page