Torulaspora cukson f. a. M. Silva, F. Paraíso, M. - A. Lachance & J. P. Sampaio 2025

Torulaspora cukson f.a. M. Silva, F. Paraíso, M.-A. Lachance & J.P. Sampaio, sp. nov. MB 853718. Fig. 4D. Etymology: Torulaspora cukson. cuk’son, N.L. app. n. cukson, from Cuk Son, the designation in Uto-Aztecan O'odham language for Tucson, the locality in which this species was originally found. Typus: USA, Arizona, Scaptodrosophila brooksae on Populus fremontii, 1985, M.A. Lachance (holotype PYCC 9174H, ex-holotype cultures PYCC 9174, CBS 18510). The holotype is permanently maintained in a metabolically inactive state in the Portuguese Yeast Culture Collection, Caparica, Portugal. The genome of this species was deposited at DDBJ/ENA/ GenBank under the accession GCA_964263435. The version described in this paper is v. 1. Description: After 1 wk on YM agar at 25 °C, cultures are smooth, cream-coloured, and butyrous. After 3 d of growth on YM agar at 25 °C, cells are ellipsoidal (3–5 × 2–3 µm) and occur singly or in pairs, and proliferation is by multilateral budding (Fig. 4D). On Dalmau plates after 2 wk at 25 °C, pseudohyphae and true hyphae are not formed. Sexual reproduction was not observed on acetate agar or corn meal agar after prolonged incubation (3 mo) at 18 °C. The physiological and biochemical profile of the species are shown in Table 1 and Table S5. Habitat and distribution: This species was found only once, in an insect (Scaptodrosophila brooksae), Arisona, USA.