Notes on South American stingless bees of the genus Scaptotrigona (Hymenoptera: Apidae), Part II: Subgroup A of the postica species group

This is the second part of an intended four on various nomenclatural matters regarding South American species of the Neotropical stingless bee genus Scaptotrigona Moure (Apinae: Meliponini).  Here, the postica species group is briefly outlined and organized into two informal subgroups, the first of which is treated herein.  A key to these species is provided and the following new species established: Scaptotrigona ederi Engel, new species; S. gonzalezi Engel, new species; S. kuperi Engel, new species; S. extranea Engel, new species; S. rosellae Engel, new species; S. magdalenae Engel, new species; S. tatacoensis Engel, new species; S. macarenensis Engel, new species; S. caduceus Engel, new species; S. illescasi Engel, new species; S. baldwini Engel, new species; S. santiago Engel, new species; S. yungasensis Engel, new species; and S. faviziae Engel, new species.  Lastly, a neotype is designated for S. ochrotricha (Buysson).