Review and cladistic analysis of Serdia Stal (Heteroptera, Pentatomidae, Pentatomini)

Review and cladistic analysis of Serdia Stal (Heteroptera, Pentatomidae, Pentatomini). Thirteen species are presently included in the genus: S. apicicornis Stal, 1860; S. beckerae Thomas & Rolston, 1985; S. bihamulata, Thomas & Rolston, 1985; S. calligera Stal, 1860; S. concolor Ruckes, 1958; S. costalis Ruckes, 1958; S. delphis Thomas & Rolston, 1985; S. inspersipes Stal, 1860; S. limbatipennis Stal, 1860; S. lobata Thomas & Rolston, 1985; S. quadridens Thomas & Rolston, 1985; S. rotundicornis Becker, 1967, and S. ruckesi Thomas & Rolston, 1985. Five new species are described: S. indistincta sp. nov. (Irai; Rio Grande do Sul), S. bicolor sp. nov. (Ponta Grossa; Parana) S. maculata sp. nov. (Itatiaia; Rio de Janeiro) S. maxima sp. nov. (Imbituba; Santa Catarina) and S. robusta sp. nov. (Itatiaia; Rio de Janeiro) from Brazil. A cladistic analysis was performed using 40 characters and 21 taxa. The genera Tibilis Stal, 1860; Neotibilis Grazia & Barcellos, 1994 and Similliserdia Fortes & Grazia, 1998 were used as outgroups. The monophyly of Serdia is supported by three synapomorphies: scutellum apex with darkned margins; males with the inner wall of genital cup thicker and with brim-shaped processes; females with the thickennings of the vaginal intima arising at posterior half of gonapophyses 9, and projected ventrad. The subgenus Brasiliicola Kirkaldy, 1909 is considered junior synonym of Serdia. Illustrations, a map of geographical distribution and a key for the species are also provided.