Distribution of the MGM YSO candidates displayed on the Herschel map showing false positives and re-classification. Here, the re-classification does not consider flat-spectrum sources. Top panel: 330 MGM protostar candidates (P, red dots), of which 33 are re-classified as disk candidates (yellow filled circles). Bottom panel: 2442 MGM disk candidates (D, blue dots), of which ten are re-classified as protostar candidates (red filled stars), and seven as MS stars or Class III sources (yellow filled stars). Other symbols are false positives, like extra-galactic contamination (cyan filled diamonds), and fuzzy nebulous contamination (green filled squares) as given in the legends. The “×” symbol marks uncertain sources and sources contaminated by image artifacts (“uncertain/cont.”).