Contributions to the taxonomy of Vilga Stål (Hemiptera, Coreidae, Pseudophloeinae) with the description of a new species from southern Brazil Author Costa, Wanessa Da Silva Author Barcellos, Aline text Zootaxa 2017 2017-11-22 4353 1 journal volume 31365 10.11646/zootaxa.4353.1.11 cc8ceff7-fe59-4090-9bde-3eaf28e8dd82 1175-5326 1064452 5FC87216-289A-4355-8A17-1505712F0C95 Key to species of Vilga (adapted from Dolling, 1977 ) 1 Pronotum deeply emarginate posteriorly ( Trinidad , Brazil , Paraguay , Bolivia , northern Argentina ).... westwoodi (Kolenati) - Pronotum shallowly emarginate posteriorly................................................................ 2 2 Abdominal sternites bearing spines at postero-lateral angles which are about as long as width of connexivum; pronotum very spinose. ( Guatemala , French Guiana , Brazil , Paraguay )............................................. dallasi Distant - Abdominal sternites bearing spines at most half as long as width of connexivum; pronotum less spinose................ 3 3 Posterior femur with a single, small, subapical spine beneath. ( Peru , Chile , Argentina ).............................. 4 - Posterior femur beneath with two major subapical spines and a group of three or four spine-like tubercules between distal spine and apex of femur. (Southern U.S.A. to southern Brazil )....................................................... 6 4 Length of antennal segment I at most 0.56 times width of head inclusive of eyes. ( Peru )................ peruviana Dolling - Length of antennal segment I at least 0.65 times width of head inclusive of eyes.................................... 5 5 Apex of corium at rest reaching level of middle of laterotergite V, apex of membrane not reaching beyond posterior margin of tergite VII. ( Chile , Argentina , Brazil ).......................................................... chilensis (Stein) - Apex of corium reaching posteriorly to base of laterotergite VI, membrane projecting beyond posterior tip of body. ( Argentina )................................................................................... penningtoni Bergroth 6 Lateral margins of abdominal sternites almost smooth......................................................... 7 - Lateral margins of abdominal sternites distinctly granulate or tuberculate....................................... 10 7 Posterolateral spines of pronotum short, width of pronotum across tips of spines about 1.97 times width of head inclusive of eyes. ( Brazil )........................................................................................ 8 - Posterolateral spines of pronotum long, widely diverging, width of pronotum across tips of spines at least 2.09 times width of head including eyes.................................................................................... 9 8 Pubescence including some longer and more erect setae; antennal segment II more than half the width of segment I ( Brazil )........................................................................................ antennata sp. nov. - Pubescence uniform in height; antennal segment II less than half the width of segment I ( Brazil )........ brasiliensis Dolling 9 Antennal segment I without tubercles, though with some large granules present. ( Panama , Guyana )....... divaricata Distant - Antennal segment I externally with a row of projecting tubercles. ( Brazil ).......................... sanctipauli Dolling 10 Antennal segments I–III clothed with suberect hairs longer than width of segment II, disc of hemelytral membrane with numer- ous crossveins; sometimes brachypterous. (Southern U.S.A. to El Salvador ).......................... mexicana Distant - Antennal segments I–III clothed with hairs shorter than width of segment II; disc of membrane without cross-veins; insect never brachypterous................................................................................. 11 11 Pronotum with posterolateral spines directed obliquely forwards. ( Brazil ).............................. obliqua Dolling - Pronotum with posterolateral spines directed laterally....................................................... 12 12 Lateral margins of abdominal sternites V–VII bearing granules no longer than broad. ( Costa Rica , Panama , Aruba , Guyana , Colombia , Brazil )....................................................................... dissimilis Distant - Lateral margins of abdominal sternites V–VII bearing at least some tubercles longer than broad...................... 13 13 Antennal segment I about equal in length to width of head across antennifers. (Scutellum as long as its own basal width). (Bra- zil)................................................................................ serrulata Montandon - Antennal segment I longer than head width across antennifers................................................ 14 14 Antennal segment I about equal in length to width of head inclusive of eyes; scutellum as long as its own basal width. ( Brazil )......................................................................................... grisea Dolling - Antennal segment I shorter than width of head including eyes; scutellum distinctly longer than its own basal width. ( Brazil )...................................................................................... grisescens Dolling