A new species of Pirhosigma Giordani Soika, 1978 (Hymenoptera, Vespidae: Eumeninae), with additional notes and a key to the species in the genus

Abstract

A new Neotropical species of Pirhosigma Giordani Soika, 1978 is described, Pirhosigma transfluvium Ferreira & Oliveira. The male of Pirhosigma limpidum Giordani Soika, 1978 is reported for the first time. An illustrated identification key is presented for all currently recognized species of Pirhosigma.

Two new species of Pirhosigma Giordani Soika (Vespidae, Eumeninae), with an updated catalog for the genus

“…The species P. abregoi is readily differentiated from all other species in the key of Ferreira et al (2017), since it is the only species that does not present a preapical fossa in T1 -compare Fig. 5: P. abregoi, without a preapical fossa on T1; and Fig.…”

“…Pirhosigma transfluvium Ferreira & Oliveira, 2017 Pirhosigma transfluvium Ferreira et al 2017: 270, 277. Type Data: Holotype male AMNH.…”

“…Pirhosigma is a somewhat small genus of eumenine wasps, currently comprising nine described species. Of these, two were described within the last three years (Ferreira et al 2015, Ferreira et al 2017. Recently, Hermes et al (2013) provided an insightful study on the nesting biology of two species of Pirhosigma, with special reference to the use of vegetable matter for potentially camouflaging the mud nests.…”