Figure 1

Scanning electron micrographs showing anterior end of female Physaloptera clausa . A, Cephalic papillae (thin arrows), cephalic collarette (thick arrow), and ciliated cervical papilla (CP). Bar= 150 μm. B, Triangular lateral pseudolabia (LPL), external teeth (T), one of two amphids (A), two of four cephalic papillae (CP), and cephalic collarette (star). Bar= 42.9 μm. C, Two amphids (A), four cephalic papillae (CP), cephalic collarette (star), and a circle of internal small teeth inside the mouth (arrowhead). Bar= 100 μm. D, Higher magnification of inside of the mouth (star), and internal small teeth (T). Bar= 5 μm.