Parent: Pachycephalopsis

└─ Pachycephalopsis hattamensis (Green-backed robin)

└─── Pachycephalopsis hattamensis axillaris

└─── Pachycephalopsis hattamensis ernesti

└─── Pachycephalopsis hattamensis hattamensis

└─── Pachycephalopsis hattamensis insularis

└─── Pachycephalopsis hattamensis lecroyae