*Aspergillus occultus Visagie et al., Stud. Mycol. 78: 32, 2014. [MB809198]. — type: CBS H-21794. ex-type: CBS 137330 = IBT 32285 = DTO 231-A7. sect Circumdati. ITS barcode: KJ775443 (alternative markers: BenA = KJ775061; CaM = KJ775239; RPB2 = n.a.).
*Aspergillus ochraceopetaliformis Bat. & Maia, Anais Soc. Biol. Pernambuco 15: 213, 1957. [MB292851]. — type: no 270 Instituto de Micologia, Iniversidade do Recife. ex-type: CBS 123.55 = NRRL 4752 = IBT 14347 = ATCC 12066 = IMI 211804 = QM 6955 = WB 4752. sect Circumdati. ITS barcode: EF661429 (alternative markers: BenA = EF661350; CaM = EF661388; RPB2 = EF661283).
*Aspergillus ochraceoroseus Bartoli & Maggi, Trans. Brit. Mycol. Soc. 71: 393, 1979. [MB309233]. — type: RO 104 S. ex-type: CBS 550.77 = NRRL 28622 = ATCC 38873 = SRRC1432. sect Ochraceorosei. ITS barcode: EF661224 (alternative markers: BenA = EF661113; CaM = EF661137; RPB2 = EF661074).
*Aspergillus ochraceus K. Wilh., Beitr. Kenntn. Aspergillus: 66, 1877. [MB190223]. — type: IMI 16247iv. ex-type: CBS 108.08 = NRRL 398 = IBT 11952 = ATCC 1008 = CECT2093 = DSM 824 = HARVARD296 = IMI 16247 = NCTC 3889 = NRRL 1642 = QM 6731 = Thom 112 = WB 398. sect Circumdati. ITS barcode: EF661419 (alternative markers: BenA = EF661322; CaM = EF661381; RPB2 = EF661302).
*Aspergillus oerlinghausenensis Bader & Houbraken, FEMS Microbiol. Letters 363: fnv236 p. 4, 2015. [MB813868]. — type: CBS H-22119. ex-type: CBS 139183 = IBT 33878 = DTO 316-A3 = Isolate 227. sect Fumigati. ITS barcode: KT359601 (alternative markers: BenA = KT359603; CaM = KT359605; RPB2 = n.a.).
*Aspergillus olivicola Frisvad, Zalar & Samson, Mycologia 100: 781, 2008 ≡ Emericella olivicola Frisvad, Zalar & Samson, Mycologia 100: 788, 2008. [MB507362]. — type: CBS H-19888. ex-type: CBS 119.37 = IBT 21903. sect Nidulantes. ITS barcode: EU448268 (alternative markers: BenA = AY339996; CaM = EU443986; RPB2 = KU866923).
*Aspergillus omanensis Y. Horie & Udagawa, Mycoscience 36: 391, 1995 ≡ Emericella omanensis Y. Horie & Udagawa, Mycoscience 36: 391, 1995. [MB414655]. — type: CBM FA-700. ex-type: CBM FA-700. sect Nidulantes. ITS barcode: n.a (alternative markers: BenA = AB524047; CaM = AB524047; RPB2 = n.a.).
*Aspergillus oryzae (Ahlb.) Cohn, Jahresber. Schles. Ges. Vaterl. Cult. 61: 226, 1884 ≡ Eurotium oryzae Ahlb., Dingler's Polytechn. J. 230: 330, 1878. [MB184394]. — type: IMI 16266. ex-type: CBS 102.07 = NRRL 447 = ATCC 1011 = ATCC 12891 = ATCC 4814 = ATCC 7561 = ATCC 9102 = IAM13118 = IFO 4075 = IFO 537 = IFO 5375 = IMI 16266 = IMI 44242 = LSHBA c .19 = NCTC 598 = NRRL 692 = QM 6735 = Thom 113 = WB 447. sect Flavi. ITS barcode: EF661560 (alternative markers: BenA = EF661483; CaM = EF661506; RPB2 = EF661438).
*Aspergillus osmophilus Asgari & Zare Mycoscience 55: 58, 2014. [MB803278]. — type: IRAN 16110. ex-type: IRAN 2090C = CBS 134258. sect Aspergillus. ITS barcode: KC473921 (alternative markers: BenA = LT671127; CaM = LT671128; RPB2 = LT671129).
*Aspergillus ostianus Wehmer, Bot. Centralbl. 80: 461, 1899. [MB179393]. — type: IMI 15960. ex-type: CBS 103.07 = CBS 548.65 = IBT 13386 = NRRL 420 = ATCC 16887 = IMI 015960iii = IMI 15960 = LCP 89.2584 = LSHBA c .35 = NCTC 3788 = QM 7460 = Thom 4724.35 = WB 420. sect Circumdati. ITS barcode: EF661421 (alternative markers: BenA = EF661324; CaM = EF661385; RPB2 = EF661304).
*Aspergillus otanii Takada, Y. Horie & Abliz, Mycoscience 42: 364, 2001 ≡ Neosartorya otanii Takada, Y. Horie & Abliz, Mycoscience 42: 364, 2001. [MB474714]. — type: CBM FA-914. ex-type: NRRL 32571 (representative strain). sect Fumigati. ITS barcode: EF669961 (alternative markers: BenA = EF669818; CaM = EF669888; RPB2 = EF669749).