Fig. 3
From: Morphological and molecular characterization of Setaria equina in donkeys
Scanning electron micrograph of adult S. equina. a3 Oval oral opening was surrounded by dorsal (D) and ventral (V) lips, a pair of lateral labial papillae (L), two pairs of external labial papillae, two pairs of hilly elevated amphids (astriks), cephalic and smaller submedian papillae (curved arrow, × 1500). b3 Higher magnification of cephalic (arrow) and external labial papillae (arrow head, × 6000). c3 Higher magnification of amphid (× 12,000). d3 Predeirid (× 3000). e3 Vulva (× 6000). f3 Heavy tubercles in male caudal end (× 6000). g3, h3 Male caudal papillae arranged in three groups: 3 pairs precloacal (Pr), a pair of adcloacal (Ad), and 2 pairs postcloacal (Po) in addition to central papilla (star) and a pair of lateral appendages (white circle, × 400 and × 1600)