FIGURE 21 in Asian pheretimoid earthworms in North America north of Mexico: An illustrated key to the genera Amynthas, Metaphire, Pithemera, and Polypheretima (Clitellata: Megascolecidae)

FIGURE 21. Pithemera bicincta. (A, B) Male pore regions and the associated genital markings of two specimens (USNM 124780 and 124781). (C) Two female pores in XIV (arrows); note the lighter color surrounding the female pores compared to that of the clitellum in the background. (D) Left spermathecae in V and VI. (E) Right prostate gland and its duct (arrow). (F) Right intestinal caecum in XXII, as opposed to in XXVII as in Amynthas and Metaphire. C–F from USNM 124780.