Torula submersa W.H. Tian, Y.P. Chen & Maharachch J. Fungi 2023

Torula submersa W.H. Tian, Y.P. Chen & Maharachch J. Fungi 2023

Description

Saprobic on submerged decaying wood (Fig. 2 View Figure 2 a, b). Sexual morph: Undetermined. Asexual morph: Colonies effuse on nature host, black, friable. Mycelium immersed to superficial, composed of septate, pale brown, branched hyphae. Conidiophores macronematous, mononematous, erect, smooth, straight or slightly flexuous, dark brown to pale brown (Fig. 2 View Figure 2 c). Conidiogenous cells polyblastic, terminal, dark brown, pale brown at apex, on conidiophores, minutely verruculose, doliiform to subglobose. Conidia solitary or in branched chains, acrogenous, simple, phragmosporous, dark brown, pale brown at apex, 2-4-septate, constricted at the septa, verruculose or finely echinulate, rounded at both ends, easily separating; 14-20 μm (= 17 μm, SD = 3, n = 60) long, 6-8 μm (= 7 μm, SD = 1, n = 60) wide (Fig. 2 View Figure 2 d-n).

Culture characteristics

Conidia germinating on PDA within 10 hours and germ tubes produced from the apex. Colonies growing on PDA, reaching 10 cm in 15 days at 24℃. Colonies were raised in the middle, velvety on the surface and had a white centre fading to yellowish-brown, reverse, yellowish-brown in centre and white edges.

Material examined

China, Yunnan Province, submerged decaying wood in Luguhu Lake, 100°49′08.33″E, 27°39′39.24″N, March 2021, Yan Tao, L147 (KUNCC 22-12426).

Notes

Torula submersa was introduced by Tian et al. (2023), collected on a submerged decaying branch from Sichuan Province. In this study, a fresh collection was made on submerged decaying wood in Luguhu Lake, Yunnan Province. Phylogenetic analysis showed that our collection (KUNCC 22-12426) sistered with T. submersa (Fig. 3 View Figure 3 ). Morphological characteristics of our new collection are consistent with Torula submersa ( Tian et al. 2023). Based on morphological characteristics and phylogenetic analysis, we, therefore, identified our new collection as Torula submersa , which was collected from a lentic freshwater habitat for the first time.