Diaporthe conica C.M. Tian & Q. Yang
publication ID |
https://dx.doi.org/10.3897/mycokeys.39.26914 |
persistent identifier |
https://treatment.plazi.org/id/FFBA2841-96C9-CEF8-B2AD-C36BCDFC5F68 |
treatment provided by |
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scientific name |
Diaporthe conica C.M. Tian & Q. Yang |
status |
sp. nov. |
Diaporthe conica C.M. Tian & Q. Yang sp. nov. Figure 11
Diagnosis.
Diaporthe conica is phylogenetically and morphologically distinct from D. rostrata , in smaller locule and alpha conidia.
Holotype.
CHINA. Zhejiang Province: Tianmu Mountain, on symptomatic branches of Alangium chinense , 20 Apr. 2017, Q. Yang (holotype: BJFC-S1484; ex-type culture: CFCC 52571).
Etymology.
Named after the conical conidiomata.
Description.
Conidiomata pycnidial, 420-580 μm diam., solitary and with single necks erumpent through the host bark. Tissue around the neck is conical. Locule oval, undivided, 385-435 μm diam. Conidiophores reduced to conidiogenous cells. Conidiogenous cells unbranched, straight or sinuous, apical or base sometimes swelling, 19-23.5 × 2.8 μm. Alpha conidia hyaline, aseptate, ellipsoidal, biguttulate, 5.5-7 × 2.3-3 μm (av. = 6.5 × 2.6 μm, n = 30). Beta conidia not observed.
Culture characters.
Cultures incubated on PDA at 25 °C in darkness. Colony white to yellowish, with dense and felted mycelium, lacking aerial mycelium, with maize-coloured conidial drops exuding from the ostioles.
Additional material examined.
CHINA. Zhejiang Province: Tianmu Mountain, on symptomatic branches of Alangium chinense , 20 Apr. 2017, Q. Yang, living culture CFCC 52572 (BJFC-S1485); ibid. living culture CFCC 52573 (BJFC-S1486); ibid. living culture CFCC 52574 (BJFC-S1487).
Notes.
Four isolates clustered in a clade distinct from further Diaporthe species based on DNA sequence data. Morphologically, this species is characterised by conical conidiomata, which is similar with D. rostrata from Juglans mandshurica . However, D. conica differs from D. rostrata by having smaller locule and alpha conidia (310-385 vs. 620-1100 μm in locule; 5.5-7 × 2.3-3 vs. 8.5-11.5 × 4-5 μm in alpha conidia) ( Fan et al. 2015).
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