Descriptions of two new species of the enigmatic Neotropical tribe Chryxini (Hemiptera, Heteroptera, Reduviidae) and a key to genera and species with single membrane cell

The Chryxini Champion, 1898, previously recognized as a subfamily of the Reduviidae Latreille, 1807, is now placed in the Reduviinae Latreille, 1807 as a tribe to accommodate five genera and 18 species from the Neotropical Region. Many species of the Chryxini are rarely encountered in the field as well as in museum collections, and their systematics, morphology, and ecology are still poorly understood. In the present study, two new species of the Chryxini, Chryxus willemsei Chen, Hartong & Cai, n. sp. (from Commewijne, Suriname) and Wygodzinskyella gilsantanai Chen, Li & Cai, n. sp. (from Río Grande do Sul, Brazil), are described and illustrated. The Chryxus genus group is proposed to include Chryxus Champion, 1898, Lentia Wygodzinsky, 1946, Petasolentia Weirauch, 2012, and Wygodzinskyella Usinger, 1952; this genus group is characterized by the tuft of long setae on the mesopleuron and the single membrane cell on the hemelytron; other related morphological characters are also discussed. An identification key to the genera and species of the Chryxus group is provided. The Chryxini and Chryxus are newly recorded from Suriname.