*Penicillium ochotense Kirichuk & Pivkin, Mycological Progress 16: 21, 2017. [MB818672]. — type: LE 312278. ex-type: KMM 4670 (PIBOC). sect Canescentia. ITS barcode: KU358553 (alternative markers: BenA = KU358556; CaM = KU358559; RPB2 = n.a.).

*Penicillium ochrochloron Biourge, Cellule 33: 269, 1923. [MB272701]. — type: IMI 39806. ex-type: CBS 357.48 = ATCC 10540 = IMI 039806 = NRRL 926 = QM 7604. sect Lanata-Divaricata. ITS barcode: GU981604 (alternative markers: BenA = GU981672; CaM = KF296378; RPB2 = KF296445).

*Penicillium ochrosalmoneum Udagawa, J. Agric. Sci. Tokyo Nogyo Daig. 5: 10, 1959 ≡ Eupenicillium ochrosalmoneum D.B. Scott & Stolk, Antonie van Leeuwenhoek 33: 302, 1967. [MB302409]. — type: NHL 6048. ex-type: CBS 489.66 = ATCC 18338 = CSIR 145 = IMI 116248ii = NRRL 35499. sect Ochrosalmonea. ITS barcode: EF626961 (alternative markers: BenA = EF506212; CaM = EF506237; RPB2 = JN121524).

*Penicillium odoratum M. Chr. & Backus, Mycologia 53: 459, 1961. [MB335755]. — type: WSF 2000. ex-type: CBS 294.62 = CBS 296.62 = ATCC 14769 = DSM2419 = IFO 7741 = IMI 094208ii = NRRL 3007 = WSF2000. sect Aspergilloides. ITS barcode: KC411730 (alternative markers: BenA = KJ834478; CaM = KM089363; RPB2 = JN406583).

*Penicillium olsonii Bainier & Sartory, Ann. Mycol. 10: 398, 1912. [MB121021]. — type: IMI 192502. ex-type: CBS 232.60 = IBT 23473 = IMI 192502 = NRRL 13058 = NRRL 13716. sect Brevicompacta. ITS barcode: EU587341 (alternative markers: BenA = AY674445; CaM = DQ658165; RPB2 = JN121464).

*Penicillium onobense C. Ramírez & A.T. Martínez, Mycopathologia 74: 44, 1981. [MB112525]. — type: CBS 174.81. ex-type: CBS 174.81 = ATCC 42225 = IJFM 3026 = VKMF-2183. sect Lanata-Divaricata. ITS barcode: GU981575 (alternative markers: BenA = GU981627; CaM = KF296371; RPB2 = KF296447).

*Penicillium oregonense Visagie, M. Chr. & Samson, Persoonia 36: 145, 2016. [MB808268]. — type: CBS H-21607. ex-type: CBS 129775 = DTO 208A5. sect Torulomyces. ITS barcode: KF303668 (alternative markers: BenA = KF303623; CaM = KF303640; RPB2 = KF303710).

*Penicillium ornatum Udagawa, Trans. Mycol. Soc. Japan 9: 49, 1968 ≡ Eupenicillium ornatum Udagawa, Trans. Mycol. Soc. Japan 9: 49. 1968. [MB335756]. — type: NHL 6101. ex-type: CBS 190.68 = ATCC 18608 = IFO 31739 = IMI 137977 = NHL 6101 = NRRL 3471. sect Ramigena. ITS barcode: KC411687 (alternative markers: BenA = KJ834479; CaM = n.a.; RPB2 = JN121451).

*Penicillium ortum Visagie & K. Jacobs, Mycological Progress 14: 96-P18, 2015. [MB809820]. — type: CBS H-21602. ex-type: CBS 135669 = CV 102 = DTO 180-I9. sect Lanata-Divaricata. ITS barcode: JX091427 (alternative markers: BenA = JX091520; CaM = JX141551; RPB2 = KF296443).

*Penicillium osmophilum Stolk & Veenb.-Rijks, Antonie van Leenwenhoek 40: 1, 1974 ≡ Eupenicillium osmophilum Stolk & Veenb.-Rijks, Antonie van Leeuwenhoek 40: 1, 1974. [MB319288]. — type: CBS 462.72. ex-type: CBS 462.72 = CBS 439.73 = IBT 14678 = NRRL 5922. sect Osmophila. ITS barcode: EU427295 (alternative markers: BenA = AY674376; CaM = KU896846; RPB2 = JN121518).

*Penicillium ovatum (K. Ando & Nawawi) Houbraken & Samson, Stud. Mycol. 70: 48, 2011 ≡ Torulomyces ovatus K. Ando & Nawawi, Mycoscience 39: 317, 1998. [MB561961]. — type: TNS-F-238518. ex-type: CBS 136664 = KY 12726. sect Exilicaulis. ITS barcode: KF667370 (alternative markers: BenA = KF667366; CaM = KF667368; RPB2 = KF667372).

*Penicillium oxalicum Currie & Thom, J. Biol. Chem. 22: 289, 1915. [MB121033]. — type: IMI 192332. ex-type: CBS 219.30 = ATCC 1126 = FRR 787 = IMI 192332 = MUCL 29047 = NRRL 787 = QM 7606. sect Lanata-Divaricata. ITS barcode: AF033438 (alternative markers: BenA = KF296462; CaM = KF296367; RPB2 = JN121456).