Geotrichum Link, Mag. Ges. Naturf. Freunde

Yang, Erfu, Karunarathna, Samantha C., Shao, Shicheng, Han, Lisu, Samarakoon, Milan C., Elgorban, Abdallah M., Chiu, Chuni, Tibpromma, Saowaluck & Promputtha, Itthayakorn, 2025, Additions to Termitomyces aurantiacus growing termite comb-associated fungi, Phytotaxa 690 (2), pp. 212-230 : 215-216

Geotrichum Link, Mag. Ges. Naturf. Freunde Berlin 3 (1): 17 (1809)

Index Fungorum number: IF8327

Type species: Geotrichum candidum Link, Mag. Gesell. Naturf. Freunde , Berlin 3(1–2): 17 (1809)

Notes: Geotrichum is distinguished by the features of arthroconidia, which are released in a random sequence, and septal walls that contain micropores ( De Hoog et al. 2004). Geotrichum candidum has been found in a range of moist environments, such as soil, plants, dairy products (cheese, cream, milk), digestive tracts of humans and animals, and organic materials in water. The genus Geotrichum currently encompasses 15 species ( Zhu et al. 2024). Geotrichum candidum strains have been used in the dairy industry to provide typical cheese flavors ( Hemme et al. 1982). Additionally, Geotrichum strains have shown a propensity for biofilm formation ( Kamilari et al. 2023). The sexual form of Geotrichum is referred to as Dipodascus , and its asci are multi-spored, usually comprising eight to over one hundred ascospores ( de Hoog & Smith 2011). Nonetheless, Nagahama et al. (2008) amended Geotrichum (= Dipodascus ) to include four ascospores species. The phylogeny of Geotrichum has been revised by accepting the genera Dipodascus , Galactomyces , and Saprochaete ( Zhu et al. 2024) . The phylogram of known Geotrichum and our new isolates are presented in Figure 2 .

Figures

FIGURE 2. Phylogram of Geotrichum constructed using maximum likelihood analysis, based on a combined LSU and ITS sequence dataset. The analysis encompassed 54 strains and encompassed a total of 1054 characters (LSU: 1–599 bp, ITS: 600–1054 bp). Newly introduced species are highlighted in red, and the type strains are indicated in bold. Bootstrap values equal to or higher than 60% (ML, left) and Bayesian posterior probabilities equal to or higher than 0.95 (BI, right) are indicated at the nodes, while hyphens (-) denote values below these thresholds for ML/BI.