Singa melanocephala C. L. Koch, 1836
Epeira melanocephala (C. L. Koch, 1836)
Araneus hamata melanocephalus (C. L. Koch, 1836)
Singa hamata melanocephala (C. L. Koch, 1836)

The taxon melanocephala is usually regarded as a subspecies of Singa hamata. However, Breitling et al. 2016 correctly point out that the original description of Singa melanocephala perfectly matches an alleged color morph of the species Singa nitidula. The typical form of Singa nitidula has an entirely black prosoma, but there is an additional form (with a reddish prosoma with a black triangle) that is usually also subsumed under the species Singa nitidula. This form might indeed be just a color variant of Singa nitidula. In this case, Singa melanocephala would be a senior synonym of Singa nitidula. Alternatively, the form with the reddish prosoma is in fact a separate species. In this case, this species would bear the name Singa melanocephala. In the absence of further information I provisionally favor the second hypothesis and regard Singa melanocephala as a separate species. Further data is urgently required to establish the status of Singa melanocephala.