Arnoldia Zimbabwe Vol 10 (29) 2014 D.G. A new species of Causus Lichtenstein from the Congo/Zambezi watershed in north-western Zambia (Reptilia : Squamata : Viperidae). p341-350

A study of all the available material of Causus rhombeatus (Lichtenstein) from Zambia and Katanga in the Democratic republic of the Congo indicates that three specimens from along the Congo/Zambezi watershed represents an undescribed species.