Figure 8 in A cladistic analysis of whiteflies, subfamily Aleyrodinae (Hemiptera: Sternorrhyncha: Aleyrodidae)

Figure 8. Different shapes of the operculum. (A) transversely elliptical; (B) nearly trapezoidal, rounded at angles; (C) nearly rectangular, wide about twice as long as length, posterior angles toothed and/or slightly indentate; (D) subcordate; (E) semicircular; (F) rectangular, convex-sided, hind margin slightly curves anteriorly and/or straight; (G) rectangular, convex-sided, hind margin with a wide projection; (H) cordate or slightly elongate-cordate; (I) rectangular shaped pushed inward at posterior margin; (J) squarish, convex-sided, narrowed posteriorly.