Belocercus S. Müller, 1847

Braun, Michael P., Datzmann, Thomas, Arndt, Thomas, Reinschmidt, Matthias, Schnitker, Heinz, Bahr, Norbert, Sauer-Gürth, Hedwig & Wink, Michael, 2019, A molecular phylogeny of the genus Psittacula sensu lato (Aves: Psittaciformes: Psittacidae: Psittacula, Psittinus, Tanygnathus, † Mascarinus) with taxonomic implications, Zootaxa 4563 (3), pp. 547-562 : 558

Belocercus S. Müller

Type species: Psittacus barbatulatus Bechstein = Psittacus longicauda Boddaert

Morphology/distribution: no red shoulder patch; medium size, very long tail; male with black lores, horizontal black beard stripe, green crown and rose-coloured cheeks, not encircling hindneck; upper mandible red, lower mandible brown; females duller with completely dark-brown bill and shorter tail. Distribution: Malay Peninsula to Borneo and Sumatra.

Several subspecies exist within the B. longicauda complex, and further investigation is required to resolve the evolutionary history and taxonomy of Belocercus , which shares a common ancestor with Psittacula s.s. Based on its unclear phylogenetic position, with low support values, and morphological differences from this clade, however, we regard it as a separate genus.