There are 23 species of crocodilian currently recognised, although evidence suggests that some may warrant being split [eg Crocodylus niloticus to C. suchus and C. niloticus (see Hekkala et al. 2011); Osteolaemus tetraspis to O. tetraspis, O. osborni and O. cf. tetraspis(?) (see Eaton 2010)]. Although Crocodylus cataphractus is now generally acknowledged as Mecistops cataphractus, the latter is not formally accepted by IUCN and CITES, and so the former name is used here.
Descriptions for each of the species are provided as pdf documents below.
Eaton, M.J. (2010). Dwarf Crocodile Osteolaemus tetraspis. Pp. 127-132 in Crocodiles. Status Survey and Conservation Action Plan. Third Edition. Crocodile Specialist Group: Darwin.
Hekkala, E., Shirley, M.H., Amato, G., Austin, J.D., Charter, S., Thorbjarnarson, J., Vliet, K.A., Houck, M.L., Desalle, R. and Blum, M.J. (2011). An ancient icon reveals new mysteries: mummy DNA resurrects a cryptic species within the Nile crocodile. Molecular Ecology (doi: 10.1111/j.1365-294X.2011.05245.x).