Phaeoseptum carolshearerianum

Calabon, Mark S., Jones, E. B. Gareth, Pang, Ka-Lai, Abdel-Wahab, Mohamed A., Jin, Jing, Devadatha, Bandarupalli, Sadaba, Resurreccion B., Apurillo, Carlo Chris & Hyde, Kevin D., 2023, Updates on the classification and numbers of marine fungi, Botanica Marina (Warsaw, Poland) 66 (4), pp. 213-238 : 227

2.5.16 Phaeoseptum carolshearerianum

Phaeoseptum (type species P. aquaticum ) was originally described from submerged wood in a freshwater swamp, and is characterized by black ascomata under a pseudoclypeus, narrowly cellular pseudoparaphyses, cylindricalclavate asci with a short pedicel and brown ascospores, with 10 – 13(– 15)-transversely septate and one vertical septum in each cell (Zhang et al. 2013). Using a combined LSU, SSU, TEF- 1α, ITS, and RPB 2 analysis, two isolates of Phaeoseptum carolshearerianum formed a sister clade with other Phaeoseptum species ( P. aquaticum , P. mali , P. manglicola , P. terricola ) ( Dayarathne et al. 2020a). Morphologically, P. carolshearianum fits in the generic description of Phaeoseptum in having dark pigmented, immersed ascomata, cylindrical to clavate, pedicellate asci and muriform brown ascospores. However, P. carolshearianum lacks a clypeus and has asymmetric oblong to broadly fusiform ascospores. Currently, there are seven species in Phaeoseptum from terrestrial, freshwater, and marine habitats.