MycoKeys 37: | 9-38 (20 | 8) A peer-reviewed open-access journal doi: 10.3897/mycokeys.37.27275 RESEARCH ARTICLE Oo Mycokeys http://mycokeys.pensoft.net Launched to accelerate biodiversity research Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) Isabel Iturrieta-Gonzalez', Josepa Gené', Josep Guarro', Rafael E Castaneda-Ruiz*, Dania Garcia! | Unitat de Micologia, Facultat de Medicina i Ciéncies de la Salut and IISPV, Universitat Rovira i Virgili, Reus, Spain 2. Instituto de Investigaciones Fundamentales en Agricultura Tropical “Alejandro de Humboldt” (INIFAT), 17200, La Habana, Cuba Corresponding author: Josepa Gené (josepa.gene@urv.cat) Academic editor: /. Haase | Received 12 April 2018 | Accepted 13 July 2018 | Published 26 July 2018 Citation: Iturrieta~-Gonzalez I, Gené J, Guarro J, Castafieda-Ruiz RF, Garcia D (2018) Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales). MycoKeys 37: 19-38. https://doi.org/10.3897/mycokeys.37.27275 Abstract In a survey of soil and herbivore dung microfungi in Mexico and Spain, several dendryphiella-like species were found. Phylogenetic analyses based on ITS and LSU sequences showed that these fungi belonged to the family Dictyosporiaceae (Pleosporales) and represent an undescribed monophyletic lineage distant from Dendryphiella. Therefore, the genus Neodendryphiella is proposed to accommodate three new spe- cies, NV. mali, N. michoacanensis and N. tarraconensis. The novel genus shares morphological features with Dendryphiella such as differentiated conidiophores and polytretic integrated conidiogenous cells, that produce acropetal branched chains of conidia. Neodendryphiella differs in the absence of nodulose conidi- ophores bearing conidiogenous cells with pores surrounded by a thickened and darkened wall, typical features in the conidiogenous apparatus of Dendryphiella. In addition, the phylogenetic and morphologi- cal analysis of several reference strains of different Dendryphiella species, available for comparison, support the proposal of D. variabilis sp. nov., which mainly differs from the other species of the genus by having conidia up to 7 septa and highlight that D. vinosa and D. infuscans are obscure species that require further taxonomic review. Keywords Dendryphiella, Ascomycota, Phylogeny, Taxonomy Copyright Isabel Iturrieta-Gonzdlez et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 20 Isabel Iturrieta-Gonzdlez et al. / MycoKeys 37: 19-38 (2018) Introduction In an ongoing survey of asexual microfungi from soil and herbivore dung, several interesting specimens morphologically consistent with Dendryphiella were found from samples collected in Mexico and Spain. Dendryphiella is a dematiaceous hy- phomycete proposed by Bubak and Ranojevic (Ranojevié 1914) and typified with D. interseminata, which is currently considered a synonym of D. vinosa (Reisinger 1968). Dendryphiella vinosa is a saprobic fungus commonly found on plant debris, especially on the decaying herbaceous stems of several plants (Ellis 1971, Mercado Sierra et al. 1997). The genus is characterised by pigmented conidiophores, with terminal or intercalary polytretic conidiogenous cells, with dark scarring on the no- dose swellings, producing acropleurogenous, solitary or catenate conidia, which are commonly multi-septate and cylindrical with rounded ends (Ellis 1971). Although Index Fungorum and MycoBank list 17 taxa in Dendryphiella, a recent review of literature reported only 12 species are accepted, including the newly proposed D. fasciculata (Liu et al. 2017). Dendryphiella pitsanulokensis is the latter species added to the genus (Hyde et al. 2018). Previous phylogenetic studies, conducted mainly from sequence data of the 18S nrDNA (SSU), 28S nrDNA (LSU) and the internal transcribed spacer (ITS) nrDNA regions, showed that the marine species D. arenar- iae and D. salina were phylogenetically distant from the type D. vinosa and related to the Pleosporaceae (Gareth Jones et al. 2008, Suetrong et al. 2009). Both species were therefore moved to the genus Paradendryphiella (Woudenberg et al. 2013) and, more recently, D. vinosa was included in the family Dictyosporiaceae (Tanaka et al. 2015, Boonmee et al. 2016). However, DNA sequence data for Dendryphiella spe- cies is very limited to create a robust taxonomy for the genus. Only LSU and/or ITS sequences of D. eucalyptorum, D. fasciculata, D. paravinosa, D. pitsanulokensis and D. vinosa are available (Crous et al. 2014, 2016, Liu et al. 2017, Hyde et al. 2018). In addition, with the exception of the first four mentioned, there is no ex-type culture of other species of this genus and only reference strains of D. vinosa and D. infuscans are available in public collections for comparison. Despite the similarity of our soil isolates to Dendryphiella, a preliminary study revealed that they showed a low sequence relationship with members of this genus. On the other hand, they were closely related to the strain CBS 139.95 of Diplococcium (Di.) asperum, which was proven to be related to the Dictyosporiaceae (Shenoy et al. 2010, Boonmee et al. 2016). It is well known that the genus Diplococcium is highly polyphyletic, with species distributed across different classes of the Ascomycota, with its type species, Di. spicatum, being related to the Helotiales in Leotiomycetes (Shenoy et al. 2010, Hernandez-Restrepo et al. 2017). The aim of the present study was to resolve the taxonomy of these dendryphiella- like fungi which, based on analysis of the ITS and LSU loci, might represent a new genus in Dictyosporiaceae. Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 21 Material and methods Sampling and fungal strains studied Soil and dung samples collected in different geographical regions (Mexico and Spain) were studied using the wood baiting technique, moist chambers and dilution plating method according to Calduch et al. (2004). Using the first two techniques, we found three interesting dendryphiella-like fungi, which were isolated on Potato Dextrose Agar (PDA; Pronadisa, Madrid Spain) and incubated at room temperature in the dark. Ad- ditionally, six strains from the Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands (CBS), which corresponded to D. vinosa (CBS 117.14, CBS 118716, CBS 121797 and CBS 584.96), D. infuscans (CBS 381.81) and Di. asperum (CBS 139.95) were included in the study for morphological and sequence comparison (Table 1). DNA extraction, sequencing and phylogenetic analysis The isolates were cultured on PDA for 7 days at 25 °C in darkness. The DNA was extracted through the modified protocol of Werner et al. (1998). The primer pairs ITS5/ITS4 and NL1/NL4b were used to amplify ITS regions, including the 5.8S gene and the D1/D2 domain of the LSU of the nrDNA, respectively, following Cano et al. (2004). PCR products were purified and stored at -20 °C until sequencing. The same pairs of primers were used to obtain the sequences at Macrogen Europe (Mac- rogen Inc. Amsterdam, The Netherlands). Finally, the sequences were assembled and edited using SeqMan v. 7.0.0 (DNAStar Lasergene, Madison, WI, USA) to obtain the consensus sequences. The sequences generated in the present study were compared with those of the National Center for Biotechnology Information (NCBI) using the Basic Local Align- ment Search Tool (BLAST). Alignments for each locus were made with the MEGA (Molecular Evolutionary Genetics Analysis) software v. 6.0. (Tamura et al. 2013), us- ing the ClustalW algorithm (Thompson et al. 1994) and refined with MUSCLE (Ed- gar 2004) or manually, if necessary, on the same platform. The alignment included our sequences complemented with available sequences of NCBI and NITE Biological Resource Center (NBRC) of species that conformed the different genera of the family Dictyosporiaceae (Table 1). This determined the phylogenetic position of the dendry- phiella-like isolates in this group of fungi. Phylogenetic reconstructions with ITS and LSU sequences were made using Maximum Likelihood (ML) and Bayesian Inference (BI) approaches under the MEGA software v. 6.0. (Tamura et al. 2013) and MrBayes v. 3.2.6 (Ronquist et al. 2012), respectively. For the ML phylogenetic analysis of the LSU region, the best nucleotide sub- stitution model determined by the same programme was the Kimura 2-parameter 22 Isabel Iturrieta-Gonzdlez et al. / MycoKeys 37: 19-38 (2018) Table |. Species included in this study, their origin and GenBank accession numbers. Genbank accession no.” Species Original identification Strain number! Country ITS LSU Aquaticheirospora lignicola RK-2006a (T) Thailand AY736378 Cheirosporium triseriale HMAS 180703 (T) China EU413954 Drechslera biseptata Dendryphiella vinosa CBS 117.14 Scotland | LT963770 | LT963509 Dendryphiella eucalyptorum CBS 137987 (T) Spain KJ869139 | KJ869196 Dendryphiella fasciculata MFLUCC 17-1074 (T)| Thailand | MF399213 | MF399214 Dendryphiella paravinosa Dendryphiella vinosa CBS 118716 New Zealand | LT963357 | LT963359 Dendryphiella paravinosa Dendryphiella vinosa CBS 121797 Spain LT963354 | LT963355 Dendryphiella paravinosa CBS 141286 (T) Italy KX228309 Dendryphiella variabilis Dendryphiella vinosa CBS 584.96 (T) Cuba 1T963454 Dendryphiella vinosa NBRC 32669 Japan 03266901 Dendryphiella vinosa - - - EU848590 Dictyocheirospora bannica KH 332 (T) Japan LC014543 | AB807513 Dictyocheirospora pseudomusae KH 412 Japan LC014549 | AB807516 Dictyocheirospora rotunda MFLUCC 14-0293b (T)| Thailand |KU179099| KU179100 Dictyosporium bulbosum yone 221 Japan AB807511 Dictyosporium elegans NBRC 32502 (T) Japan DQ018100 Dictyosporium strelitziae CBS'123359 (1) South Africa FJ839653 Digitodesmium bambusicola CBS 110279 (T) Philippines |DQ018091 | DQ018103 Gregarithecium curvisporum KT 922 (T) Japan AB809644 | AB807547 Jalapriya inflata NTOU 3855 UK | JQ267362 | JQ267363 Jalapriya pulchra MFLUCC 15-0348 (T) China KU179108 | KU179109 Jalapriya toruloides CBS 209.65 — DQ018093 | DQ018104 Neodendryphiella mali Diplococcium asperum| CBS 139.95 (T) Italy LT906657 Neodendryphiella mali Dendryphiella sp. FMR 17003 Spain LT993735 Neodendryphiella michoacanensis| Dendryphiella sp. FMR 16098 (T) Mexico LT906658 Neodendryphiella tarraconensis | Dendryphiella sp. FMR 16234 (T) Spain LT906659 | LT906656 Paradendryphiella arenaria CBS 181.58 (T) France KF156010 | KC793338 Paradendryphiella salina CBS 142.60 United | 5411540] KC793339 Kingdom Pseudocoleophoma calamagrostidis KT 3284 (T) Japan LC014592 | LC014609 Pseudocoleophoma polygonicola KT 731 (T) Japan AB809634 | AB807546 Pseudodictyosporium elegans CBS 688.93 (T) Taiwan |DQ018099}DQ018106 Pseudodictyosporium wauense NBRC 30078 Japan DQ018105 Torula herbarum ennincts CBS 381.81 Netherlands | LT963446 | LT963455 infuscans ‘CBS: Culture collection of the Westerdijk Fungal Biodiversity Institute, Utrecht, the Netherlands; FMR: Facultat de Medicina, Universitat Rovira i Virgili, Reus, Spain; HMAS: The Mycological Herbarium of the Chinese Academy of Science; KH: K. Hirayama; KT: K. Tanaka; MFLUCC: Mae Fah Luang Univer- sity Culture Collection, Chiang Rai, Thailand; NBRC: NITE Biological Resource Centre, Japan; NTOU: Institute of Marine Biology, National Taiwan Ocean University; RK: R. Kodsueb; yone: H. Yonezawa. (T): ex-type strain. Sequences newly generated in this study are indicated in bold. >Number of sequence of the NBRC database. Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 23 with Gamma distribution and, for the ITS region, it was the General Time Reversible model with Gamma distribution. The combined analysis of these two phylogenetic markers was tested through Incongruence Length Difference (ILD) implemented in the Winclada programme (Farris et al. 1994). For the combined analysis of LSU and ITS sequences, the best nucleotide substitution model was the General Time Revers- ible with Gamma distribution and Invariant sites (G+I). ML bootstrap values (BML) >70% were considered significant. For the BI phylogenetic analysis, the best nucleotide substitution model was de- termined using jModelTest (Posada 2008). For the LSU region, we used the Kimura 2-parameter with Gamma distribution (K80+G) and, for the ITS symmetrical model, we used Gamma distribution (SYM+G). The parameter settings used were two si- multaneous runs of 5M generations, four Markov chains, sampled every 1000 gen- erations. The 50% majority-rule consensus tree and posterior probability values (PP) were calculated after discarding the first 25% of the samples. A PP value of 20.95 was considered significant. The DNA sequences and alignments generated in this study were deposited in GenBank (Table 1) and in TreeBASE (http://treebase.org), respectively. Phenotypic study The microscopic characterisation of the fungi studied was carried out according to Ma- rin-Felix et al. (2017), using autoclaved pine twig arranged on the surface of water agar (PNA) after 7 days at 25 °C in darkness. Measurements and descriptions of the struc- tures were taken from the specimens mounted in Shear’s solution. Photomicrographs were obtained using a Zeiss Axio-Imager M1 light microscope (Zeiss, Oberkochen, Germany) with a DeltaPix Infinity x digital camera. Macroscopic characterisation of the colonies was made on PDA, Oatmeal Agar (OA; Oatmeal 30 g, agar 13 g, distilled water 1 I), Potato Carrot Agar (PCA; po- tato 20 g, carrot 20 g, agar 13 g, distilled water 1 1), SNA (KH,PO, 1 g, KNO 1 g, MgsSO,x7H,0O 0.5 g, KCI 0.5 g, Glucose 0.2 g, Sucrose 0.2 g, agar 14 g, distilled water 1 1) and Malt Extract Agar (MEA; Peptone 1 g, Glucose 20 g, Malt Extract 20 g, agar 15 g, distilled water 1 I) after 14 days at 25 °C in darkness. Colony colours in descrip- tions were matched with Kornerup and Wanscher (1978). Cardinal temperatures for growth were obtained on PDA after 14 days in darkness. Nomenclatural novelties and descriptions were deposited in MycoBank (Crous et al. 2004). Ex-type cultures and holotypes, which consisted of dried cultures, were depos- ited at the CBS. Additionally, living cultures of the new species were also preserved in the Faculty of Medicine in Reus (FMR, Spain). 24 Isabel Iturrieta-Gonzdlez et al. / MycoKeys 37: 19-38 (2018) Results The BLAST query revealed that LSU sequences of our dendryphiella-like isolates (FMR 16098, FMR 16234 and FMR 17003) showed a high percentage of identity (99%) with that of the isolate CBS 139.95 of Di. asperum and all of them were related to the Dictyosporiaceae. However, they showed a sequence identity of between 96-97% with LSU sequences of Dictyosporium species and other members of this family, including several species of Dendryphiella deposited in the GenBank. The ITS sequences did not match significantly any of those deposited in the NCBI database. We carried out individual and combined analyses with the LSU and ITS loci to assess relationships with members of the Dictyosporiaceae, including reference strains of D. vinosa and D. infuscans sequenced in the present study. Single phylogenies of LSU and ITS loci encompassed 31 and 30 sequences, respectively, representing 12 genera and including Paradendryphiella arenaria and P salina (Pleosporaceae) as out- group (Figs. S1 and S2 in the supplementary material). LSU analysis comprised 630 bp from which 111 bp were variable and 84 bp phylogenetically informative. The ITS comprised 496 bp, 266 bp being variable and 206 bp being phylogenetically informa- tive. The topology of trees for single loci were very similar and the ILD test showed that the LSU and ITS datasets loci were congruent (P = 0.16) and could be com- bined. The final combined analysis encompassed 30 sequences and comprised 1126 bp (ITS 496 bp, LSU 630 bp). The ML tree showed that FMR 16098, FMR 16234, FMR 17003 and CBS 139.95 clustered together in a well-supported undescribed monophyletic lineage representing a new genus in the family (Fig. 1). The LSU and ITS sequence comparison of the four isolates revealed them as different taxa. The low identity values together with the morphological differences found amongst them allow us to propose three new species in this new genus, which are described below. Regarding the five Dendryphiella strains included in this study, only three (CBS 118716, CBS 121797 and CBS 854.96) nested in the well-supported clade of Den- dryphiella and none of them matched sequences representative of the type species of the genus D. vinosa (DQ 307316.1, EU848590.1 and NBRC-03266901) and used previously by other authors to establish the relationship of D. vinosa with the Dicty- osporiaceae (Gareth Jones et al. 2008, Crous et al. 2014, 2016, Tanaka et al. 2015, Boonmee et al. 2016, Liu et al. 2017). The strains CBS 118716 and CBS 121797 matched the ex-type strain of D. paravinosa (CBS 141286); while CBS 584.96 nested in a terminal subclade with D. fasciculata and D. paravinosa, but it was placed in a single branch representative of a distinct taxa (Fig. 1). Its genetic difference and the production of conidia with up to 7 septa, a distinct morphological feature with respect to the accepted species of Dendryphiella (Liu et al. 2017, Hyde et al. 2018), justify the proposal of a new species in this genus. The other two isolates that had been received as Dendryphiella did not belong to this genus. The oldest reference strain of D. vinosa (CBS 117.14) corresponded to Drechslera biseptata and the strain previously identified as D. infuscans (CBS 381.81) matched Torula herbarum. The molecular identification of all the isolates included in this study is provided in Table 1. Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 23 Taxonomy Neodendryphiella \turrieta-Gonzalez, Dania Garcia & Gené, gen. nov. MycoBank: MB824664 Etymology. ‘The name refers to the morphological similarity with Dendryphiella. Type species. Neodendryphiella tarraconensis \turrieta-Gonzalez, Gené & Dania Garcia. Description. Conidiophores semi-macronematous to macronematous, monon- ematous, erect or slightly flexuous, unbranched or branched towards the apical region, septate, subhyaline to brown, smooth to verrucose, cylindrical, some slightly swollen in the conidiogenous loci. Conidiogenous cells integrated, terminal or intercalary, pol- ytretic, cylindrical or clavate, forming conidia in acropetal branched chains. Ramo- conidia aseptate or septate, pale brown, smooth to verruculose, mostly cylindrical or subcylindrical, rounded apex and truncate base, with several pores and conidial scars often thickened and darkened. Conidia blastocatenate, aseptate or septate, pale brown, verruculose to verrucose, ellipsoidal, doliiform, clavate or subcylindrical, with scars thickened and darkened. Sexual morph not observed. Distribution. Italy, Mexico and Spain. Neodendryphiella mali \turrieta-Gonzalez, Gené & Dania Garcia, sp. nov. MycoBank: MB824665 Fig. 2 Etymology. Name refers to the substrate, Malus domestica, where the type strain of the species was collected. Type. Italy, Dipt. Prot. Valor. Agroalimentare, from leaf of Malus domestica, Feb. 1995, A. Cesari (holotype CBS H-23477, culture ex-type CBS 139.95). Description. Mycelium superficial and immersed, composed of septate, branched, smooth to verruculose, hyaline to pale brown hyphae of 1-3 um wide. Conidiophores semi-macronematous to macronematous, mononematous, erect or slightly flexuous, branched or unbranched, up to 11-septate, cylindrical, up to 385 um long, 3-4 um wide, brown, usually darker toward the base, smooth to verrucose. Conidiogenous cells terminal and intercalary, mostly cylindrical, 8-38 x 3—4(—5) um, with 1-4 pores. Ramoconidia 0—1-septate, with up to 3 terminal and lateral pores, pale brown, smooth to verruculose, mostly cylindrical, (1 1—)15—17(-21) x 3-4 um. Conidia catenate, with up to 10 conidia in the terminal unbranched part, (O—)1-septate, usually not con- stricted at the septum, pale brown, verruculose to verrucose, ellipsoidal, doliiform or subcylindrical with more or less rounded ends, 4-15 x 3—5 pm. Culture characteristics (14 d at 25 °C). Colonies on PDA reaching 22 mm diam., convex, slightly convoluted at the centre, pastel grey to white (1C1/1A1), aerial my- celium scarce, with slightly fimbriate margin; reverse olive brown to yellowish-brown 26 Isabel Iturrieta-Gonzdlez et al. | MycoKeys 37: 19-38 (2018) i100/1| Jalapriya inflata NTOU 3855 100/1) ' Jalapriya pulchra MFLUCC 15-0348 ' Jalapriya toruloides CBS 209.65 Dictyocheirospora rotunda MFLUCC 14-0293b 7 Dictyocheirospora pseudomusae KH 412 Dictyocheirospora bannica KH 332 T Aquaticheirospora lignicola RK-2006a T Dictyosporium strelitziae CBS 123359 7 Dictyosporium bulbosum yone 221 “10951 nictyosporium elegans NBRC 32502 T Digitodesmium bambusicola CBS 1102797 Pseudodictyosporium elegans CBS 688.93 ™ 100/1' Pseudodictyosporium wauense NBRC 30078 Cheirosporium triseriale HMAS 180703 * 100/41 pensipiiale vinosa NBRC 32669 D i cty ‘ospo ri aceae Dendryphiella eucalyptorum CBS 137987 " Dendryphiella fasciculata MFLUCC 17-1074 7 Dendryphiella variabilis sp. nov. CBS 584.96 ' Dendryphiella paravinosa CBS 118716 Dendryphiella paravinosa CBS 121797 Dendryphiella paravinosa CBS 141286 7 85/- Gregarithecium curvisporum KT 9227 Pseudocoleophoma polygonicola KT 731 7 Pseudocoleophoma calamagrostidis KT 3284 T Neodendryphiella tarraconensis sp. nov. FMR 16234 ™ Neodendryphiella michoacanensis sp. nov. FMR 16098 ' Neodendryphiella mali sp. nov. CBS 139.95 * 100/1" Neodendryphiella mali FMR 17003 Paradendryphiella arenariae CBS 181.58 7 Paradendryphiella salina CBS 142.60 Pleosp aan — 0,02 Figure |. Maximum Likelihood (ML) tree constructed with the ITS and LSU sequences of 30 strains rep- resentatives of different taxa in the families Dictyosporiaceae and Pleosporaceae. The phylogenetic tree was rooted with Paradendryphiella arenaria and P salina. Bootstrap support values for ML greater than 70% and Bayesian posterior probabilities greater than 0.95 are given near nodes, respectively. Names of species newly described here are indicated in bold. Branch lengths are proportional to distance. ' Ex-type strain. (4D3/3A2). On PCA attaining 23 mm diam., flat, olive brown to greyish-beige (4F8/4C2), aerial mycelium scarce, slightly fimbriate margin; reverse greyish-beige to brownish-grey (4C2/4D2). On OA reaching 40 mm diam., flat, granular, yellowish- brown to reddish-yellow (5E8/4B7), aerial mycelium scarce, with a regular margin; reverse olive brown to yellowish-brown (4D8/4B7). On SNA attaining 24 mm diam., flat, slightly granular, olive brown to grey (4F8/4B1), aerial mycelium scarce, with fimbriate margin; reverse yellowish-brown (5F7/5E4). On MEA reaching 11-15 mm diam., umbonate, slightly cerebriform towards the periphery, velvety, olive grey (3E2), with irregular margin; reverse olive grey (3E2). Cardinal temperature for growth. Optimum 25 °C, maximum 30 °C, mini- mum 10 °C, Distribution. Italy and Spain. Additional isolates examined. Spain, Els Ports de Beseit Natural Park, Teruel, from herbivore dung, Oct. 2017, Dania Garcia (FMR 17003) Notes. Although LSU sequences of N. mali (CBS 139.95 and FMR 17003) were very similar to those of N. michoacanensis (FMR 16098) and WN. tarraconensis (FMR 16234), ITS regions showed a similarity of 96.2% (identities = 441/458, gaps 2/458 (0 %)) with respect to NV. michoacanensis and of 92.3% (identities = 423/458, gaps 1/458 Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 2H C SNA D OA E MEA at 25 °C after 14 d F—K Conidiophores and conidia. Scale bars: 10 um (F=-K). 28 Isabel Iturrieta-Gonzdlez et al. | MycoKeys 37: 19-38 (2018) (0%)) with respect to NV. tarraconensis. IVS sequences of the two latter species described below were 92.1% similar (identities = 422/458, gaps 0/458 (0%)). Neodendryphilla mali is morphologically very similar to N. michoacanensis since both have conidia and ramoconidia 0—1-septate; however, NV. michoacanensis has shorter conidiophores (up to 280 ym long) and terminal conidial branches with fewer conidia (up to 4 per branch), which measure 5—16(—18) x 3-6 um. In addition, 2-septate co- nidia can also be present in N. michoacanensis and this species tends to grow faster than NV. mali on PDA (34 mm vs 22 mm diam. after 14 d, respectively) and PCA (42 mm vs 23 mm diam. after 14 d, respectively). Neodendryphiella mali also resembles D. infuscans, but the latter exhibits longer conidiophores, up to 500 um and smooth to mi- nutely verruculose conidia with up to 2 septa (Ellis 1971). However, the protologue of D. infuscans (as Cladosporium infuscans; Thiimen 1879), which was based on a specimen collected in Aiken (USA), describes conidia 0—1-septate, smooth-walled and up to 10 um long. No living culture of the type specimen was preserved for further comparison. As mentioned before, the strain CBS 139.95 was identified as Di. asperum and found by other authors to be related with dictyosporium-like fungi (Shenoy et al. 2010, Tanaka et al. 2015). However, the protologue of Di. asperum was characterised by single or fasciculate conidiophores, which were up to 250 um long, bearing terminal or subterminal, short and unbranched chains of conidia with only 1 septum (Pirozyn- ski 1972), morphological features that do not fit with those observed in the above- mentioned strain. We therefore concluded that it was a misidentified strain and clearly represents a different species. At any rate, it is of note that the taxonomy of Di. asperum is controversial because of the different interpretation of the morphological features of Pirozynski’s specimen (DAOM 133941c isotype). Holubova-Jechova (1982) described conidiogenous cells showing inconspicuous denticles or conidiogenous scars instead of the typical pores in conidiogenous cells of Diplococcium and suggested excluding this species from the genus. On the other hand, Goh and Hyde (1998) re-examined the isotype of Di. asperum and observed the typical pores of tretic conidiogenesis, consider- ing it an acceptable species for Diplococcium. However, since only herbarium material is preserved for comparison (Pirozynski 1972), its phylogeny remains uncertain. Neodendryphiella michoacanensis Iturrieta-Gonzalez, Dania Garcia & Gené, sp. nov. MycoBank: MB824666 Fig. 3 Etymology. Name refers to Michoacan, the geographical area where the fungus was collected. Type. Mexico, Michoacan, Villa Jiménez, from soil, Sept. 2016, E. Rodriguez- Andrade (holotype CBS H-23478; culture ex-type CBS 144323 = FMR 16098). Description. Mycelium superficial and immersed, composed of septate, branched, smooth to verruculose and hyaline to pale brown hyphae of 1-3 um wide. Conidi- Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 29 JON 6. [i » Figure 3. Neodendryphiella michoacanensis sp. nov. (ex-type FMR 16098). A-E Colonies on A PDA B PCAC SNA D OAE MEAat 25 °C after 14 d F—J Conidiophores and conidia. Scale bars: 10 um (G-J). 30 Isabel Iturrieta-Gonzdlez et al. | MycoKeys 37: 19-38 (2018) ophores semi-macronematous to macronematous, mononematous, erect or slightly flexuous, slightly branched, 1—13 septate, cylindrical or slightly swollen in the conid- iogenous loci, 44—280 x 2—4 um, brown, usually darker toward the base, smooth or verruculose, verrucose at the base. Conidiogenous cells terminal and intercalary, cylin- drical or clavate, 11-62 x 3—5 um, with up to 3 pores. Ramoconidia (0—) 1-septate, with up to 4 terminal or subterminal pores, pale brown, smooth to verruculose, cylindrical, subcylindrical, to slightly clavate, with more or less rounded apex and truncate base, 12-23 x 3-4(-5) um. Conidia catenate, with up to 4 conidia in the terminal un- branched part, (0—)1(—2)-septate, some slightly constricted at the septum, pale brown, verruculose to verrucose, ellipsoidal or subcylindrical, 5—16(—18) x 3-6 um. Culture characteristics (14 d at 25 °C). Colonies on PDA reaching 34 mm diam., slightly umbonate, velvety, olive brown (4FG6/4E8), with slightly fimbriate margin; reverse dark green (30F8) to black. On PCA attaining 42 mm diam., flat, granular, olive brown (4F8), aerial mycelium scarce, fimbriate margin; reverse dark green to olive brown (30F8/4F8). On OA reaching 48 mm diam., flat, granular, yellowish-brown to olive (5F4/3D4), aerial mycelium scarce, with a regular margin; reverse brownish-grey to greyish-yellow (4D2/3B6). On SNA attaining 22 mm diam., flat, slightly granular, olive brown (4F8), aerial mycelium scarce, with slightly fimbriate margin; reverse dark green (30F8) to black. On MEA reaching 13-15 mm diam., slightly umbonate, flat towards the periphery, velvety, yellowish-grey to olive (3C2/3F8), with white irregular margin; reverse olive grey to dark green (3E2/30F8). Cardinal temperature for growth. Optimum 25 °C, maximum 30 °C, mini- mum 10 °C. Distribution. México. Notes. Neodendryphiella michoacanensis morphologically resembles N. mali, in its conidiogenous apparatus with 0—1-septate ramoconidia, but the latter differs by having longer conidiophores (up to 385 um), terminal conidial chains with up to 10 conidia and its conidia are 0—1-septate and smaller (4-15 x 3—5 um). Neodendryphiella michoa- canensis also resembles D. uniseptata in their conidial morphology, but ramoconidia of the latter species are often aseptate and can be up to 30 um long (Matsushima 1971). Dendryphiella uniseptata is only known from the type material, which was collected in Honiara (Japan) and no ex-type culture was preserved. This species was considered a synonym of D. infuscans by Matsushima (1975) but not accepted by Liu et al. (2017). Neodendryphiella tarraconensis \turrieta-Gonzalez, Gené & Dania Garcia, sp. nov. MycoBank: MB824667 Fig. 4 Etymology. Name refers to Tarragona, the geographical area where the fungus was collected. Type. Spain, Tarragona, from garden soil, Feb. 2017, I. Iturrieta~-Gonzalez (holo- type CBS H-23479, culture ex-type CBS 144324 = FMR 16234). Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 31 : Figure 4. Neodendryphiella tarraconensis sp. nov. (ex-type FMR 16234). A=E Colonies on A PDA B PCA C SNA D OA E MEA at 25 °C after 14 d F-K Conidiophores and conidia. Scale bars:10 um (G=K). 32 Isabel Iturrieta-Gonzdlez et al. / MycoKeys 37: 19-38 (2018) Description. Mycelium superficial and immersed abundant, composed of septate, branched, smooth to verruculose, hyaline to pale brown hyphae, 1—2 um wide. Co- nidiophores macronematous, mononematous, erect or slightly flexuous, branched or unbranched, up to 6-septate, cylindrical, 19-185 x 2—5 um, brown, smooth, darker and finely verrucolose towards the base. Conidiogenous cells terminal and intercalary, subcylindrical to clavate, 9-35 x (2—)3—4(—5) um, with up to 2 pores. Ramoconidia (O—) 1—2(—3)-septate, usually slightly constricted at the septa, with up to 3 terminal and subterminal pores, pale brown, smooth to verruculose, mostly cylindrical, with rounded apex and truncate base, 12—21(—23) x 4-5 um. Conidia catenate, with up to 7 conidia in the terminal unbranched part, (0O—)1—2-septate, pale brown, verruculose, el- lipsoidal or subcylindrical with more or less rounded ends, 6—21 x 3—6(—7) um; when 1-septate, the septum is often submedial and slightly constricted, when 2-septate, usu- ally constricted at only one septum. Culture characteristics (14 d at 25 °C). Colonies on PDA reaching 23 mm diam., umbonate, velvety, greyish-brown to olive brown (5E3/4F8), with slightly fimbriate margin; reverse dark green (30F8) to black. On PCA attaining 24 mm diam., flat, vel- vety, olive brown (4F8), slightly fimbriate margin, reverse dark green to olive brown (28F5/3B2) with a pale yellow (4A3) diffusible pigment. On OA reaching 30 mm diam., flat, slightly granular, yellowish-brown to olive brown (5F8/4F4), aerial mycelium scarce, with regular margin; reverse yellowish-brown to olive brown (5F8/4F4). On SNA at- taining 21 mm diam., flat, slightly granular, yellowish-brown to olive (5F4/3F5), aerial mycelium scarce, with fimbriate margin; reverse yellowish-brown to olive (5F4/3F5). On MEA reaching 8-10 mm diam., slightly elevated but depressed at the centre, radially folded, velvety, olive (2F8), with irregular margin; reverse olive (2F4). Cardinal temperature for growth. Optimum 25 °C, maximum 30 °C, mini- mum 10 °C. Distribution. Spain. Notes. In addition to the genetic differences mentioned above, NV. tarraconensis differs from the other two species in the genus by the presence of ramoconidia with up to 3 septa and conidia from terminal branches with mostly 1—2-septate. It is notewor- thy that 1-septate conidia usually show a slightly longer basal cell since the septum is submedial and, when 2-septate, often only one of the septa is constricted, features not described in any species of Dendryphiella and Neodendryphiella. Dendryphiella variabilis Yturrieta-Gonzalez, Dania Garcia & Gené, sp. nov. MycoBank: MB824668 Fig. 5 Etymology. Name refers to the variable number of septa in the conidia. Type. Cuba, from a dead leaf of a Lauraceous tree, 1996, R.E Castaneda (holotype CBS H-23476; ex-type cultures CBS 584.96 = INIFAT C95/105-4 = MUCL 39840 = FMR 16563). Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 62: Figure 5. Dendryphiella variabilis sp. nov. (ex-type CBS 584.96). A-E Colonies on A PDA B PCA C SNA D OA E MEA at 25 °C after 14 d F Exudates and conidiophores produced on OA G=K Conidi- ophores and conidia. Scale bars: 50 um (G—H), 10 um (I-K). 34 Isabel Iturrieta-Gonzdlez et al. | MycoKeys 37: 19-38 (2018) Description. Mycelium superficial and immersed, composed of septate, branched, smooth to verruculose hyaline to pale brown hyphae, 1-3 um wide. Conidiophores ma- cronematous, mononematous, often arranged in loose fascicules, erect or slightly flexu- ous, branched, 1—8-septate, nodulose toward the apex, up to 143 um long, 2—6 um wide, brown, smooth to verruculose. Conidiogenous cells terminal and intercalary, sympodially extended towards the apex, with 1—5 pores surrounded by a thickened and darkened wall, clavate, 7-37 x 3-6(—7) um. Ramoconidia (0—)2—3-septate, cylindrical to subcylin- drical, with rounded ends, 16-27 x 5—6 um, usually with 2 apical pores, conidial scars thickened and darkened. Conidia in short branched chains, with up to 5 conidia in the terminal unbranched part, (O—)3(-7)-septate, some constricted at the medial septum, pale brown, verruculose to verrucose, cylindrical or subcylindrical, with rounded ends, 6—44 x 4—6 um, conidial scars often thickened and darkened. Sexual morph not observed. Culture characteristics (14 dat 25 °C). Colonies on PDA reaching 30-33 mm diam., slightly umbonate, flat towards the periphery, velvety, irregularly coloured yellowish-grey to olive brown (4B2/4D3) and brownish-grey to yellowish-brown (5F2/5F4), with irreg- ular margin; reverse yellowish-brown (5F8) to black. On PCA attaining 48 mm diam., flat, granular to velvety, yellowish-brown (5F8), aerial mycelium scarce, undulate margin; reverse olive to greyish-yellow (3F4/3B4), with a pale yellow diffusible pigment. On OA reaching 58 mm diam., flat, slightly granular, blond to reddish-yellow (5C4/4A7), light yellow (4A4) at the periphery, aerial mycelium scarce, with a regular margin, with scarce pale brown exudate; reverse same colouration with the colony surface. On SNA attain- ing 40 mm diam., flat, slightly granular to velvety, yellowish-brown to grey (5F7/4B1), with fimbriate margin; reverse brownish-grey to white (5D2/1A1). On MEA reaching 32 mm diam., flat, cottony, yellowish-grey to olive (4B2/3F4), yellowish-grey (3B2) at the periphery, with regular margin; reverse dark green to white (30F8/1A1). Cardinal temperature for growth. Optimum 25 °C, maximum 30 °C, mini- mum 15 °C. Distribution. Cuba. Notes. Dendryphiella variabilis differs from D. paravinosa mainly by having longer conidia (up to 44 um), which can have up to 7 septa. The conidia of D. paravinosa are up to 3-septate and measure (10-)24-27(-33) x (6-)7(-7.5) um (Crous et al. 2016). The only species of the genus reported with conidia up to 5-septate are D. eucalyptorum and D. vinosa, but they are smaller, measuring (19-)20-23(-25) x 5(-7) um in the former (Crous et al. 2014) and 13-39 x 4-8 um in the latter (Ellis 1971). The other closely related species to D. variabilis is D. fasciculata (Fig. 1), but it mainly differs by the presence of fasciculate conidiophores and 3-septate conidia (Liu et al. 2017). Discussion The present study proposes the genus Neodendryphiella based on the analysis of the ITS and LSU sequences, which represented an undescribed monophyletic lineage related but phylogenetically distant from the morphologically similar genus Dendryphiella. Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales) 35 Both genera belong to the Dictyosporiaceae (Dothideomycetes) and share similar con- idiophore morphology with polytretic conidiogenous cells forming usually septate co- nidia arranged in acropetal branched chains. Dendryphiella can be differentiated by the presence of nodulose conidiophores and conidiogeneous cells with pores surrounded by a thickened and darkened wall, which are absent in Neodrendryphiella. Other genera of the Dothideomycetes, although accommodated in different orders or families with a similar conidiogenous apparatus are Dendryphion (Toluraceae, Pleosporales) (Crous et al. 2014, Crous et al. 2015), Dendryphiopsis (Kirschsteiniotheliaceae, Kirschstei- niotheliales) (Su et al. 2016, Hernandez-Restrepo et al. 2017) and Paradendryphiella (Pleosporaceae, Pleosporales) (Woudenberg et al. 2013). However, the genus Diplo- coccium in Leotiomycetes also shows similar asexual propagules (Shenoy et al. 2010, Hernandez-Restrepo et al. 2017), which complicates the classification of these fungi based exclusively on morphological features. Our phylogenetic study not only allowed us to distinguish very similar isolates in three distinct species, N. mali, N. michoacanensis and N. tarraconensis, but also helped us to correctly identify some strains that had previously been attributed to Dendryphiella (Table 1). In addition, it is of note that, considering the species ac- cepted in Dendryphiella (Liu et al. 2017, Hyde et al. 2018), this genus seems to be morphologically heterogeneous and probably polyphyletic. It includes species with apparently polyblastic denticulate conidiogenous cells, such as D. eucalypti (Matsushima, 1983) or D. uniseptata (Matsushima, 1971), rather than polytretic conidiogenous cells typical of Dendryphiella (Rao and Narania 1974, Crous et al. 2014, 2016) or species that produce solitary conidia, such as D. cruzalmensis (Ba- tista, 1946) or D. lycopersicifolia (Batista & Peres, 1961). In this scenario, therefore, Dendryphiella requires a further taxonomic re-evaluation. However, taking into ac- count that only herbarium material is available for the type D. vinosa (preserved in the Kew herbarium, as Helminthosporium vinosum) there is a need to re-collect this species from the type locality (Cuba) for epitypification and giving nomenclature stability to the genus. 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Nucleic Acids Research 22: 4673-4680. 38 Isabel Iturrieta-Gonzdlez et al. | MycoKeys 37: 19-38 (2018) Thiimen F von (1879) Hyphomycetes nonnulli novi americani. Revue Mycologique Toulouse 1: 58-61. Werner KE, Kasai M, Francesconi A, Mu FC, Chanock SJ et al. (1998) Rapid extraction of genomic DNA from medically important yeasts and filamentous fungi by high-speed cell disruption. Journal of Clinical Microbiology 36: 1625-1629. Woudenberg JHC, Groenewald JZ, Binder M, Crous PW (2013) Alternaria redefined. Studies in Mycology 75: 171-212. https://doi.org/10.3114/sim0015 Supplementary material | Neodendryphiella gen. nov. Tree LSU Authors: Isabel Iturrieta-Gonzalez, Josepa Gené, Josep Guarro, Rafael E Castafeda- Ruiz, Dania Garcia Copyright notice: This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODDbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited. Link: https://doi.org/10.3897/mycokeys.37.27275.suppl1 Supplementary material 2 Neodendryphyella gen. nov. Tree ITS Authors: Isabel Iturrieta-Gonzalez, Josepa Gené, Josep Guarro, Rafael FE. Castafeda- Ruiz, Dania Garcia Copyright notice: This dataset is made available under the Open Database License (http://opendatacommons.org/licenses/odbl/1.0/). The Open Database License (ODDbL) is a license agreement intended to allow users to freely share, modify, and use this Dataset while maintaining this same freedom for others, provided that the original source and author(s) are credited. Link: https://doi.org/10.3897/mycokeys.37.27275.suppl2