R. Perger https://orcid.org/0000-0001-9930-9638
G.D. Rubio https://orcid.org/0000-0002-4223-2980
Date of this Version
Perger R, Rubio GD. 2021. A new species of Myrmecotypus Pickard-Cambridge spider (Araneae: Corinnidae: Castianeirinae) from the Bolivian orocline, imitating one of the world’s most aggressive ants. Insecta Mundi 0860: 1–8.
A new species of ant-mimicking spider of the subfamily Castianeirinae, Myrmecotypus rubrofemoratus Perger and Rubio, new species (Araneae: Corinnidae), is described from the Pre-Andean area of the Bolivian orocline. Adults of M. rubrofemoratus new species resemble the carpenter ant Camponotus femoratus Forel, 1907, which is considered one of the most aggressive ants in the world.
The Neotropical castianeirine genus Myrmecotypus Pickard-Cambridge is a group of slender, fast-running spiders that includes 11 species (World Spider Catalog 2020). Four species are reported from South America and three from Bolivia: M. iguazu Rubio and Arbino, 2009, M. niger Chickering, 1937, and M. tahyinandu Perger and Rubio, 2020 (Perger and Rubio 2020a).
Potential ant models were proposed for six species of Myrmecotypus (Perger and Rubio 2020a). These forms resemble morphologically specific models of the ant tribes Camponotini and Dolichoderini; all models and mimics share a moderately elongated, truncate forebody, short petiole and sub-globose abdomen. Species-specific mimicry is indicated by similarities in body color and the color and distribution of setae (Perger and Rubio 2020a).
In the present study, we describe a new species that closely resembles M. niger but shows, apart from distinct genitalia, differences in externally visible morphology that could be possibly attributed to the selection for mimicry of the carpenter ant Camponotus femoratus (Fabricius, 1804), one of the world’s most aggressive ants.