Clostridiumacidurici is the correct name if this species is regarded as a separate species within a separate genus Clostridium.
The original spelling, Clostridium acidiurici (sic), has been corrected by Cato et al. 1986.Publication:
Cato EP, George WL, Finegold SM. Genus Clostridium Prazmowski 1880, 23AL. In: Sneath PHA, Mair NS, Sharpe ME, Holt JG (eds), Bergey's Manual of Systematic Bacteriology, first edition, vol. 2, The Williams & Wilkins Co., Baltimore, 1986, p. 1141-1200.