Figures 27–30 in Contributions to scorpion systematics. III. Subfamilies Smeringurinae and Syntropinae (Scorpiones: Vaejovidae)

Figures 27–30: Photographs of female genital operculi with sclerites raised from mesosoma exposing genital aperture and the internal structure beneath the plates. Arrow indicates aperture in Figs. 27–28. 27. Syntropis aalbui, holotype, Cataviña, Baja California, Mexico. Sclerites, raised 90º, are connected at the extreme posterior margin and show no medial separation. 29–30. Pseudouroctonus williamsi, Santa Ysabel Reserve, San Diego Co., California, USA. 28. Sclerites, raised 135º, are separated considerably at the posterior margin. 29. In this specimen (collected in a pit trap) post-insemination spermatophore mating plugs were found protruding from the genital aperture, only the plug bases are visible. 30. Mating plugs extracted from aperture, arrow points to smooth distal barb of one plug.