Identification of the sources discussed in the text in the field of G319.88+00.79. a) All sources located at less than 7′ of the central exciting star (green plus). Source A is a compact 70 μm source. The underlying grey image is the Spitzer 5.8 μm image. b) Sources located at the waist of the bipolar nebula and along the parental filament. The orange contours are for the column density (contours at 1, 2, 3, 4, and 5 × 10²² cm^-2). The underlying grey image is the 70 μm image showing source A.