FIGURE 1. Eremidrilus artzaini n in New Eremidrilus species (Clitellata: Lumbriculidae) from western North America Part 1, species with two spermathecal segments

FIGURE 1. Eremidrilus artzaini n. sp. from Wildhorse Creek (A); East Fork Big Lost River (B–D, F); Summit Creek (E). A. Anterior end, external view of an unmounted worm; arrows indicate limits of clitellum. B. Chaetal pairs; left to right: III dorsal, III ventral, XII ventral. C. Atria, transverse section in X. D. Spermathecae, transverse section in XI; arrows indicate position of ventral chaetae. E. Reproductive organs, segments X–XII; both spermathecal pairs with sperm. F. Reproductive organs, segments X–XII; sperm funnels and spermatheca in XII without sperm.