Two new pentatomid species (Heteroptera: Pentatomidae) associated with rice paddies in Argentina

GERVAZONI, PAULA; DELLAPÉ, GIMENA; BALIOTTE, CARLA; FUENTES-RODRIGUEZ, DANIELA; FRANCESCHINI, CELESTE

Manguinhos, Rio de Janeiro

Workshop; IV WORKSHOP SUL-AMERICANO DE HETEROPTERA; 2019

Pentatomidae represents the fourth largest family and one of the most diverse within Heteroptera, with about 800 genera and more than 4,700 species in the world. In the Neotropics, about 230 genera and 1,400 species are known, whereas in the Argentina 94 genera and 254 species are recorded. The phytophagous pentatomids of economic importance belong to the subfamilies Edessinae and Pentatominae. Edessines feed on Solanaceae and are pests of tomato and potato in South America. The pest species of Pentatominae injure a wide range of plants, from vegetables to trees. Several species of Oebalus, Mormidea, and Tibraca are major pests of Gramineae, particularly rice and wheat. Also, Glyphepomis species are rice pests, and this crop may represent important feeding and mating sites to Hypatropis inermis. Stink bugs of genus Glyphepomis are exclusively Neotropical, occurring in most areas of Brazil, Uruguay, and Argentina. Seven species are recognized, of which G. adroguensis, G. setigera, G. spinosa and G. pelotensis have been recorded on rice crops in Brazil. On the other hand, Hypatropis species are widely distributed in Central and South America. Five species of Hypatropis are recognized, of which H. inermis and H. sternalis have been reported on rice crops in Brazil and Argentina, respectively. The specimens studied were collected in rice paddies of the Corrientes Province, Argentina, during November 2017 to April 2018. These specimens were examined under a stereosmicroscope, then mounted and dissected. Genitalia were prepared using potassium hydroxide 10%. We described a new species of Glyphepomis and a new species of Hypatropis. Glyphepomis n. sp is similar to G. spinosa by presenting the humeral angles of pronotum anterolaterally developed in spine. The two species can be distinguished by the general coloration and the body surface setose or glabrous. Hypatropis n. sp can be recognized from other species of the genus for its smaller size, and for presenting jugae longer than tylus and not convergent at the apex. Updated keys to the species of Glyphepomis and Hypatropis are provided.