S. darwini may refer to:
Sapphirina darwini Scenopinus darwini Scolytogenes darwini Scolytomimus darwini Semicossyphus darwini Semiformiceras darwini, an ammonite species in the genus Semiformiceras marking a zone in the Tithonian stage of the Jurassic period Senoculus darwini, a spider species found in Argentina Spurlingia darwini Stenaelurillus darwini, a jumping spider species found in Tanzania Stenoconchyoptera darwini Stylatula darwini Szuletaia darwini
See also S. darwinii (disambiguation) Darwini (disambiguation)