*Penicillium waksmanii K.M. Zalessky, Bull. Int. Acad. Polon. Sci., Sér. B., Sci. Nat. 1927: 468, 1927. [MB121677]. — type: IMI 39746i. ex-type: CBS 230.28 = ATCC 10516 = FRR 777 = IFO 7737 = IMI 039746 = IMI 039746i = MUCL 29120 = NRRL 777 = QM 7681. sect Citrina. ITS barcode: GU944602 (alternative markers: BenA = JN606779; CaM = JN606431; RPB2 = JN606627).
*Penicillium wellingtonense A.L.J. Cole et al., Stud. Mycol. 70: 133, 2011. [MB563208]. — type: CBS H-20657. ex-type: CBS 130375 = IBT 23557 = DTO 76C6. sect Citrina. ITS barcode: JN617713 (alternative markers: BenA = JN606670; CaM = JN606395; RPB2 = JN606616).
*Penicillium westlingii K.M. Zalessky, Bull. Int. Acad. Polon. Sci., Sér. B., Sci. Nat. 1927: 473, 1927. [MB282076]. — type: IMI 92272. ex-type: CBS 231.28 = IMI 092272. sect Citrina. ITS barcode: GU944601 (alternative markers: BenA = JN606718; CaM = JN606500; RPB2 = JN606625).
*Penicillium williamettense Visagie, M. Chr., Samson, Persoonia 36: 151, 2016. [MB808272]. — type: CBS H-21609. ex-type: CBS 129774 = DTO 208-A4. sect Torulomyces. ITS barcode: KF303667 (alternative markers: BenA = KF303622; CaM = KF303639; RPB2 = KF303709).
*Penicillium wisconsinense Visagie, M. Chr., Samson, Persoonia 36: 151, 2016. [MB808273]. — type: CBS H-21614. ex-type: CBS 128279 = DTO 198-H7 = WSF 3132. sect Torulomyces. ITS barcode: KF303670 (alternative markers: BenA = KF303624; CaM = KF303641; RPB2 = KF303706).
*Penicillium wollemiicola Visagie, Summerell, Shenoy & Seifert, Persoonia 36: 153, 2016. [MB808274]. — type: DAOM 675862. ex-type: CBS 137177 = DTO 297-E3. sect Torulomyces. ITS barcode: KJ174314 (alternative markers: BenA = KJ174315; CaM = KJ174316; RPB2 = KJ174313).
*Penicillium wotroi Houbraken et al., Int. J. Syst. Evol. Microbiol. 61: 1474, 2011. [MB518026]. — type: HUA 170336. ex-type: CBS 118171 = IBT 23253. sect Lanata-Divaricata. ITS barcode: GU981591 (alternative markers: BenA = GU981637; CaM = KF296369; RPB2 = KF296460).