Reptiles found in African continent includes many species of snakes,tortoises,lizards and crocodiles. Giant reptiles in Africa also includes Aldabra giant tortoise,Spotted Sandveld Lizard,Spotted Bush Snake,Skink and Tree Agama.
African Rock Python is one of the largest species of python and also the Africa’s largest snake species. This nonvenomous snake mostly found in variety of habitats and one of the top five largest snake species in the world.
Nile Crocodiles are the most dangerous species of crocodile and second largest reptile in the world. The Nile crocodiles are an apex predator and the most aggressive species of crocodile,found in the rivers of Nile river and mara river.
The African spurred tortoise is the largest tortoise of the African continent and also extremely strong animal of African mainland. African Spurred Tortoise is the third-largest species of tortoise in the world.
Black Mamba is the Africa’s largest venomous snake and also one of the fastest and deadliest snakes in the world. The black mamba species are tree dwelling snakes and an ambush predator of wild Africa.
Boomslang is the largest venomous snake of Colubridae family in Africa and exclusively arboreal snake. The boomslang snake is usually found in trees and shrubs of Sub-Saharan Africa.
Nile Monitor is one of the largest member of the monitor lizard, found in throughout of Africa. Nile monitor species is Africa’s largest lizard,inhabit a wide variety of habitats including swamps and mangroves.
Green Mamba species of snakes are arboreal and highly venomous tree-dwelling snake, found in East Africa. Eastern green mamba and Western green mamba two known species of the mamba.
Cape Cobra is a highly venomous species of cobra and one of the most venomous African snakes. The Cape cobra is the most dangerous species of cobra in Africa continent and has predators like honey badger,meerkats and various birds of prey.
Giant Plated Lizard is a large species of African lizard found in open and rocky mountains of the continent. This lizard is an omnivorous creature and largest of the plated lizard species.
Emperor Scorpion also known as African black scorpion is the largest species of scorpion found in the savanna grassland and rainforest of West Africa. The black scorpion is one of the largest species of scorpion in the world.
You are excluding all the marine reptiles which by mass is bigger than all the mentioned reptiles