Menisporopsis aquatica, Chen & Hu & Song & Zhai & Lai & Lin, 2022

Chen, Jia-Hao, Hu, Dian-Ming, Song, Hai-Yan, Zhai, Zhi-Jun, Lai, Lin & Lin, Kang-Hui, 2022, Menisporopsis aquatica sp. nov. (Sordariomycetes, Chaetosphaeriales, Chaetosphaeriaceae), from freshwater habitat in China, Biodiversity Data Journal 10, pp. 91008-91008 : 91008

Menisporopsis aquatica sp. nov.

Materials

Type status: Holotype. Occurrence: recordedBy: Jia-Hao Chen; individualCount: 2; occurrenceID: D16AC014-DFE2-504A-BF1B-607B53CA9FA7; Taxon: scientificName: Menisporopsis aquatica; acceptedNameUsage: Menisporopsis aquatica J.H. Chen, H.Y. Song & D.M. Hu, 2022, sp. nov; parentNameUsage: Menisporopsis theobromae S. Hughes 1952; kingdom: Fungi; phylum: Ascomycota; class: Sordariomycetes; order: Chaetosphaeriales; family: Chaetosphaeriaceae; genus: Menisporopsis; specificEpithet: aquatica; taxonRank: species; verbatimTaxonRank: species; scientificNameAuthorship: J.H. Chen, H.Y. Song & D.M. Hu; Location: continent: Asia; country: China; stateProvince: Zhejiang; county: Shaoxing; municipality: Shangyu; locality: Qianjia Lou Brook ; verbatimElevation: 11 m; locationRemarks: Label transliteration: " Zhejiang, Qianjia Lou Brook, 27/10/2020, Chen Jia-Hao"; [浙江省绍兴市上虞区钱家溇小溪， 27/10/2020 ，陈家豪]; verbatimCoordinates: 30.0498 N, 120.7790 E; decimalLatitude: 30.0498; decimalLongitude: 120.7790; georeferenceProtocol: label; Identification: identifiedBy: Jia-Hao Chen and Dian-Ming Hu ; dateIdentified: 2020; Event : samplingProtocol: collecting; eventDate: 27/10/2020; year: 2020; month: 10; day: 27; habitat: Freshwater ; Record Level : type: PhysicalObject ; language: en; rightsHolder: Dian-Ming Hu ; institutionID: HFJAU 10038; collectionID: SXC27; institutionCode: the Herbarium of Fungi , Jiangxi Agricultural University (HFJAU); collectionCode: Fungi ; ownerInstitutionCode: the Herbarium of Fungi , Jiangxi Agricultural University (HFJAU); basisOfRecord: PreservedSpecimen

Description

Colonies on submerged rotten wood effuse, scattered, pale yellow to pale brown. Mycelium partly immersed, consisting of branched, septate, smooth, thin- to thick-walled, composed of brown hyphae. Asexual morph: Stroma and hyphopodia absent. Setae simple, central, solitary, erect, straight, subulate, unbranched, dark brown, 10-12 septate, smooth, thin to thick-walled, swollen at the apex, the lower part of setae encased by numerous tightly compacted conidiophores, 170-324 μm long, 4.8-7.6 μm wide at the base. Conidiophores macronematous, synnematous, brown, smooth, thin-walled, separate, unbranched, cylindrical, erect, straight or slightly flexuous, up to 106 μm long, upper part 1.7-3.5 μm thick. Conidiogenous cells monophialidic, integrated, terminal, pale brown, cylindrical, with collarettes phialides. Conidia acrogenous, semi-endogenous, appendiculate with 6-12 μm long setulae at each end, aggregated into slimy masses at the apex of the synnemata, aseptate, curved, lunate or fusiform, hyaline, smooth, 14-20 μm (av. = 16.5 μm, n = 30) long, 2.4-3.3 μm (av. = 2.7 μm, n = 30) wide. Sexual morph: Undetermined (Fig. 1 ).

Etymology

Refers to the fungal freshwater habitat.

Notes

Menisporopsis aquatica is characterised by synnematous conidiophores growing around a black central seta, which fits well with the genus concept of Menisporopsis ( Hughes 1952). The phylogenetic results showed that our collection clustered with other Menisporopsis species and formed a robust clade.

Menisporopsis aquatica is close to Menisporopsis breviseta and Menisporopsis pandanicola in the phylogenetic tree (Fig. 2 ). Menisporopsis aquatica is also morphologically similar to M. breviseta in having lunate or fusiform, hyaline conidia appendiculate with 1-2 setulae at each end. However, M. aquatica differs from M. breviseta by its longer setae ( M. aquatica 170-324 × 4.8-7.6 μm vs. M. breviseta 95-190 × 2.7-5.4 μm) and the longer setulae ( M. aquatica 6-12 μm vs. M. breviseta 4-9 μm). Menisporopsis aquatica is morphologically similar to M. pandanicol , but differs in its shorter setae ( M. aquatica 170-324 × 4.8-7.6 μm vs M. multisetulata 344-375 × 7-10.5 μm). Menisporopsis aquatica can be distinguished from other Menisporopsis species by its conidia with 1-2 setula at each end (Table 2 ).

Figures

Figure 1. Menisporopsis aquatica (HFJAU 10038, Holotype) a-b conidiophores and conidia on submerged wood; c conidiophores with seta; d apex of the conidiophore with developing conidia; e base of the conidiophore; f seta; g-j conidia; k colony on PDA. Scale bars: a-b = 100 µm, c = 50 µm, d-j = 10 µm.

Figure 2. Phylogenetic tree (RAxML) obtained from the DNA sequence data of ITS and LSU sequences of 32 strains showing taxa in Menisporopsis and Dictyochaeta. The new isolates are shown in bold, red. The MP and ML bootstrap values (BS) ≥ 75 % and Bayesian posterior probabilities (PP) ≥ 0.95 are presented at the nodes. The scale bar shows the number of estimated mutations per site. The tree was rooted to Leptosporella arengae (MFLUCC 15 - 0330) and Leptosporella bambusae (MFLUCC 12 - 0846).