 The "adansonii group" (also known as the "gabonensis group" or the "adansonii-gabonensis group") includes "P. adansonii", "P. broadleyi", "P. gabonensis", "P. marani", and "P. nanus".Species in the "adansonii group" are characterized by short abdominal scutes relative to the elongate anterior plastral lobe, as well as a short bridge between the carapace and the plastron.All of the remaining species are characterized by relatively longer abdominal scutes and a longer bridge between the carapace and plastron and are referred to as the "subniger group".