Pyxicephalus

Key to the species of Pyxicephalus 1.a. Odontoids wider than long.......................................................... P. angusticeps New Status 1 b. Odontoids longer than wide............................................................................. 2 2.a. Upper jaw free of barring in adults.............................................................. P. adspersus 2 b. Upper jaw barred in adults.............................................................................. 3 3.a. Tympanum hypertrophied (width greater than eye diameter), and positioned less than one half eye diameter in distance from eye; toes with moderate webbing................................................................. P. obbianus 3 b. Tympanum not hypertrophied (width less than or equal to eye diameter), and positioned more than one half eye diameter in distance from eye; toes with rudimentary webbing..................................................... P. edulis
Published as part of Scott, Elizabeth, Visser, John D., Yetman, Caroline A., Oliver, Lauren & Broadley, Donald G., 2013, Revalidation of Pyxicephalus angusticeps Parry, 1982 (Anura: Natatanura: Pyxicephalidae), a bullfrog endemic to the lowlands of eastern Africa, pp. 201-228 in Zootaxa 3599 (3) on page 204, DOI: 10.11646/zootaxa.3599.3.1, http://zenodo.org/record/217094