FIGURE 6 A–I. Cosmocephalus obvelatus, SEM. A in Two new nematode species of the genus Cosmocephalus Molin, 1858 (Spirurida: Acuariidae), with an amended generic diagnosis and an identification key to Cosmocephalus spp.

FIGURE 6 A–I. Cosmocephalus obvelatus, SEM. A. Anterior end, female, lateral view; note deirid (arrow); B. Anterior end, male, lateral view; note deirid (arrow); C. Pseudolabia, apical view; note cephalic papillae (arrowheads), amphid (arrow), cuticular swellings dorsally and ventrally at the bases of the pseudolabia (asterisks); D. Anterior end, apical view; note small pores; E. Deirid; F. Postdeirid. G. Posterior end, male, ventral view; note ventral cuticular ridge, precloacal papillae (arrowheads) and cloaca (arrow). H. Caudal alae, note postcloacal papillae (arrowheads). I. Posterior end, female, lateral view; note phasmid (arrow) and nipple-like projection. Scale bars: A, B, H, I = 50 μm; G = 100 μm; C, F = 20 μm; D, E = 10 μm.