Fungalpedia – Note 1023, Metulocladosporiella
Metulocladosporiella. Crous.
Citation when using this data: Tian Q et al. 2021 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig 1
Classification: Herpotrichiellaceae, Chaetothyriales, Chaetothyriomycetidae, Eurotiomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic on living leaves. Hyphae immersed to superficial, branched, septate, hyaline, subhyaline to pale olivaceous, thin-walled. Sexual morph: Undetermined. Asexual morph: hyphomycetous. Conidiophores macronematous, mononematous, solitary or aggregated, erect, subcylindrical, arising from hyphae, smooth-walled. Conidiogenous cells integrated, terminal, occasionally intercalary, sympodial, polyblastic, with or without conidial scars, subdenticulate, truncate. Conidia in simple and branched chains, ellipsoid, ovoid, subcylindrical, fusiform, subhyaline to pale olivaceous, 0–1-septate, thin-walled, smooth-walled, conidial secession schizolytic. Chlamydospores absent (Crous et al. 2006).
Type material – Jamaica, on Musa sp., 7 September 1942, E. B. Martyn [slide ex type coll.] (IMI 7521) – lectotypus hic designates; Honduras, on Musa sp., R.H. Stover (CBS herb. 14788-epitypus hic designatus; culture ex-epitype CBS 161.74 ¼ ATCC 36973).
Notes – Metulocladosporiella Crous et al. was established by Crous et al. (2006) to accommodate Cladosporium musae E.W. Mason which is the causal agent of speckle disease on the banana in Herpotrichiellaceae. The genus is characterized by frequently branched, pigmented conidiophores, holoblastic, subconspicuous to conspicuous conidiogenous loci and subhyaline conidia formed in acropetal, often branched chains (Crous et al. 2006). The phylogenetic analysis based on the ITS and LSU sequence data demonstrates that Metulocladosporiella musae (E.W. Mason) Crous et al. (CBS 161.74) formed a sister group with Arthrophiala arthrospora (D.J. Soares, R.W. Barreto & U. Braun) W.S. Lisboa et al. (CPC 19480) with 99% ML BS, 1.00 BYPP support representing as a distinct clade in Chaetothyriales In morphology, Metulocladosporiella resembles Cladophialophora in Herpotrichiellaceae. However, Cladophialophora has unbranched, micro- to semimacronematous conidiophores while Metulocladosporiella has branched, macronematous, mononematous conidiophores (Crous et al. 2006). Thus, we maintain Metulocladosporiella in Herpotrichiellaceae pending further studies.
Type species: Metulocladosporiella musae (E.W. Mason) Crous, Schroers, J.Z. Groenew., U. Braun & K. Schub., Mycol. Res. 110(3): 269 (2006).
Other accepted species: Species Fungorum – search Metulocladosporiella.
Figure 1 – Metulocladosporiella musae (CBS 161.74, ex-epitype, redrawn from Crous et al. 2006). a Conidiophore. b, d Conidiogenous cells with conidia. c Conidia. e Base of conidiophore on hypha. Scale bar: a–e = 10 μm.
References
Entry by
Qing Tian, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
Published online 16 December 2021