Loxosceles species

Almeida, Marlus Queiroz, Alves-Oliveira, João Rafael, Mendes, Diego Matheus de Mello, Sobral, Rafael, Silva-Neto, Alberto Moreira da & Morais, José Wellington de, 2019, Alien spiders: First record of Loxosceles gaucho Gertsch, 1967 (Araneae: Sicariidae) in the Amazon region, Brazil, Papéis Avulsos de Zoologia 59, pp. 1-7 : 2

Key to the Loxosceles species in Amazonas state, Brazil (Modified from Gertsch, 1967)

Males

1. Palpal tarsus as wide as palpal tibia.Apex of embolus forming a sinuous curve ( Figs.1 B-C)......................................... Loxosceles gaucho Gertsch

— Palpal tarsus thinner than palpal tibia. Apex of embolus with a mild curvature ( Figs.4 B-C)............................. Loxosceles amazonica Gertsch

Figures

Figure 1. Loxosceles gaucho (male). (A) habitus;(B) palp,retrolateral view;(C) palp,prolateral view.Scale bars:A, 3 mm;B-C,2 mm.

Figure 4. Loxosceles amazonica.(A) (Female),live specimen.(B) palp,retrolateral view;(C) palp,prolateral view.(D) spermathecae,ventral view.