Loxosceles willianilsoni sp. n., male holotype (MNRJ 6953). 52 carapace 53–55 left palpal bulb 53 dorsal 54 prolateral 55 retrolateral. Scale bar 1mm.

 
 
  Part of: Fukushima CS, Andrade RMG, Bertani R (2017) Two new Brazilian species of Loxosceles Heinecken & Lowe, 1832 with remarks on amazonica and rufescens groups (Araneae, Sicariidae). ZooKeys 667: 67-94. https://doi.org/10.3897/zookeys.667.11369