There is no such thing as Cerastes cerastes durissus, this is some sort of screw-up.
Here is the relevant part of the EMBL databse entry for Cerastes cerastes:
Subspecies:
Cerastes cerastes cerastes (LINNAEUS 1758)
Cerastes cerastes karlhartli SOCHUREK 1974
Cerastes cerastes mutila DOMERGUE 1901
Cerastes cerastes hoofieni WERNER & SIVAN in WERNER et al. 1999
Family:
Viperidae, Serpentes (snakes)
Distribution:
Egypt, Libya, Tunisia, Algeria, Morocco, Mauritania, Mali, Niger, Israel, Sudan, Oman (fide Joger 1983).
hoofieni: SW corner of Arabian Peninsula (endemic). Terra typica: King Khalid Airbase, Saudi Arabia, (18°18'N, 42°44'E)
Comment:
Venomous! Reports from Jordan, Saudi Arabia, and Yemen may represent C. gasperetti. The two subspecies Cerastes cerastes karlhartli and C. c. mutila are not even mentioned in WERNER et al. 1999. Both are synonymized with C. cerastes by MCDIARMID, CAMPBELL & TOURÉ 1999.
Cerastes cerastes hoofieni was named after Mr. Jacob Haim Hoofien (1913-1997) who studied Middle Eastern herpetology.
Hope this helps.
Cheers,
Wolfgang
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