Fungalpedia – Note 2849, Fuscocatenula
Fuscocatenula. Réblová & A.N. Mill.
Citation when using this data: Wenping W et al. 2022 – Fungalpedia.
Index Fungorum, Facesoffungi, MycoBank, GenBank
Classification: Chaetosphaeriaceae, Chaetosphaeriales, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Colonies effuse, hairy, brown, mycelium partly immersed, partly superficial. Teleomorph: Unknown. Anamorph: Conidiophores solitary, erect, unbranched, brown to dark brown, thick-walled, paler and thinnerwalled towards the apex. Conidiogenous cells integrated, terminal, monophialidic, extending percurrently, cylindrical to lageniform, brown; collarettes funnel-shaped, brown. Conidia cuneiform to obovoid, broadly rounded apically, truncate at the base, aseptate, hyaline when young, pale brown at maturity, with protracted maturation, smooth, formed in a basipetal chain.
Ecology/Substrate/Host: Saprobes on dead material of plant in terrestrial and freshwater environments.
Geographical distribution: China (Réblová et al. 2021).
Description and illustration: Réblová et al. (2021).
Notes: Fuscocatenula is a newly established genus as a segregate for two fungi distantly related from Catenularia, although morphologically similar (Réblová et al. 2021). Conidia of Fuscocatenula are obovoid with a truncate base, and lack an angular outline and small, circular, thin-walled pale areas in corners that are present in Catenularia. Conidia of these two accepted species have a protracted maturation; at first, they are hyaline and only later become pale brown, while still attached in a chain. Sometimes the chain consists of hyaline conidia with only one or a few mature pigmented conidia (Li et al. 2017a,b; Luo et al. 2019). While in Catenularia, conidia are
also hyaline when young but mature soon, and when released from the conidiogenous locus they are usually pigmented. Two species are accepted in the genus and both are reported from China. Here we add another species, and the DNA barcode is provided for F. variegata.
Key to known species of Fuscocatenula
1. Conidia 21–27 × 12–14μm………………………………..……………….………..F. submersa
1. Conidia less than 20 μm long……………………………………………………..…………….2
2. Conidia 8.5–11 × 5.5–7.5 μm…………………………………………….…….……F. variegata
2. Conidia10–15 × 5–5.5 μm……………………………….…………….…….….F. bambusicola
Type species: Fuscocatenula submersa (Z.L. Luo, K.D. Hyde & Hong Y. Su) Réblová & A.N. Mill., in Réblová, Nekvindová & Miller, MycoKeys 81: 31 (2021).
Other accepted species: Species Fungorum – search Fuscocatenula.
References
Entry by
Wenping Wu, R&D Center, Novozymes China, No. 14 Xin Xi Lu, Shangdi Zone, Haidian District, Beijing 100085, People’s Republic of China
Published online 3 August 2026