Collariella Hilkhuijsenii Fungal Planet Description Sheets 463

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462 Persoonia – Volume 39, 2017

Collariella hilkhuijsenii Fungal Planet description sheets 463

Fungal Planet 715 – 20 December 2017 Collariella hilkhuijsenii X. Wei Wang, sp. nov.

Etymology. Named for Joost Hilkhuijsen, who collected this specimen. mata, without aerial hypha, without coloured exudates, reverse This species was discovered during a Citizen Science project in the Nether uncoloured. lands, ‘Wereldfaam, een schimmel met je eigen naam’, describing novel fungal species isolated from Dutch soils. Typus. The Netherlands, Reeuwijk, from garden soil, Feb. 2017, J. Hilk huijsen (holotype CBS H-23232, culture ex-type CBS 143305 = JW16019; Classiﬁcation — Chaetomiaceae, Sordariales, Sordariomy- ITS, LSU, tub2 and rpb2 sequences GenBank MG432011, MG432012, ces. MF716586 and MF716587, MycoBank MB823460). Ascomata superﬁcial, pale mouse grey in reflected light owing Notes — This species appears morphologically similar to to ascomatal hairs, obovate to turbinate or ellipsoidal, 250–350 Collariella bostrychodes, but can be distinguished by smaller μm high (including the collar), 190–300 μm diam, with a wide ascospores and thinner terminal ascomatal hairs compared ostiole around a darkened collar, 25–50 μm high and 110–180 to the ascospores (6–7 × 5.5–6.5 × 4.5–5.5 μm) and the μm wide. Ascomatal wall brown, textura globulosa to angularis terminal hairs (4–7 μm near the base) of C. bostrychodes. in surface view, and often with cells arranged in a petaloid pat- Phylogenetically, this species is close to C. quadrangulata that tern around the bases of lateral hairs. Terminal hairs arising has quadrangular ascospores. from the apical collar, conspicuously rough, dark brown, septate, erect in the lower part, 3–5.5 μm near the base, spirally coiled in the upper part. Lateral hairs seta-like, tapering and fading towards the tips. Asci fasciculate, clavate or fusiform, spore- bearing part 20–29 × 7–10.5 μm, stalks 12–25 μm long, with 8 irregularly-arranged ascospores, evanescent. Ascospores olivaceous when mature, limoniform, bilaterally flattened, (5.5–)6–6.5(–7) × 5–6 × 4–4.5(–5) μm, with an apical germ pore. Asexual morph unknown. Culture characteristics — Colonies on OA with an entire edge, about 32–38 mm diam in 7 d at 25 °C, forming pale mouse grey ascomata, without aerial hypha, without coloured exudates, reverse uncoloured. Colonies on CMA similar to those on OA, but forming denser ascomata, and some ascomata developed slower. Colonies on MEA with an entire edge, mem- 1 Collariella quadrangulata CBS 152.59 (KX976845) branous, about 35–41 mm diam in 7 d at 25 °C, forming dense 0.98 Collariella quadrangulata CBS 142.58 (KX976844) and pale mouse grey to mouse grey ascomata and radiating 0.94 furrows in the central part, with seven or more concentric rings Collariella quadra CGMCC3.17917 T (KY575870) 0.92 around the mass of ascomata which are formed by immersed Collariella hilkhuijsenii JW16019 T hyphae, without aerial hyphae; without coloured exudates, 0.95 Collariella causiiformis CBS 792.83 (KX976840) reverse uncoloured. Colonies on PCA transparent due to very T spare mycelia, with an entire edge, about 31–37 mm diam in Collariella robusta CBS 551.83 T (KX976846) 0.92 7 d at 25 °C, forming relatively sparse pale mouse grey asco- 1 Collariella virescens CBS 148.68 T (KX976848)

1 Collariella virescens CBS 547.75 (KX976849)

1 1 Collariella gracilis CBS 249.75 (KX976843) Collariella gracilis CBS 146.60 T (KX976842)

1 Collariella bostrychodes CBS 163.73 (KX976837) Collariella bostrychodes CBS 586.83 (KX976838)

Collariella carteri CBS 128.85 T (KX976841)

1 Chaetomium globosum CBS 160.62 NeoT (KT214666) Chaetomium globosum CBS 148.51 (KF001801)

0.03 Consensus phylogram resulting from a Bayesian analysis of partial sequences of rpb2 region from representative strains of Collariella species. The sequences were aligned using MAFFT v. 7 (Katoh & Standley 2013) and included 852 nucleo- tides. GTR+I+G was used as the best nucleotide substitution Colour illustrations. Background, collection site (backyard) and collector model and the phylogenetic tree was generated under MrBayes (Joost Hilkhuijsen); ascomata with spirally coiled ascomatal hairs (scale v. 3.2.1 (Ronquist & Huelsenbeck 2003). Chaetomium globo- bar = 100 µm), ascomatal wall, asci, part of a terminal ascomatal hair and sum (Chaetomiaceae, Sordariales) was used as the outgroup ascospores (scale bars = 10 µm). taxon.

X.W. Wang, State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No. 3, 1st Beichen West Road, Chaoyang District, Beijing 100101, China; e-mail: [email protected]