Loxosceles vallenar, median and lateral receptacles of the female genitalia A–C female from Boquerón Chañar (MACN-Ar 44131) D holotype from Vallenar (AMNH). Abbreviations: IF? = putative interpulmonary fold, LR = lateral receptacle, MR = median receptacle, UE? = putative uterus externus; details could not be resolved in light microscopy. Scale bars: 200 µm (A, C, D); 50 µm (B).