Phytopathogenic Dothideomycetes - CBS - KNAW

Quaedvlieg et al.
Fig. 30. Sphaerulina oxyacanthae (CBS 135098). A. Leaves with leaf spots. B. Close-up of conidiomata. C. Section though conidioma. D–F. Conidiogenous cells. G. Conidia
(note appendages). Scale bars: C = 150 µm, all others = 10 µm.
µm below basal septum; basal cell (incl. appendage) 11–20 µm
long, conidia (60–)75–90(–100) × 2(–2.5) µm.
Culture characteristics: Colonies on PDA umbonate with undulate
edge and sparse, white aerial mycelium, surface isabelline, reverse
greyish sepia, after 14 d, 3 cm diam; similar on MEA and PDA.
Specimen examined: Netherlands, Wageningen, 51°57’50.43”N 5°41’0.41”E, on
leaves of Crataegus sp. (Rosaceae), Sep. 2012, W. Quaedvlieg (CBS H-21291,
culture CBS 135098 = S654).
Notes: Several septoria-like species have been described from
leaves of Crataegus (Farr & Rossman 2013). The present
collection matches the description of Septoria oxyacanthae (leaf
spots on Crataegus oxyacantha in Germany, conidia 8–12-septate;
conidial dimensions not given). Unfortunately we have been unable
to locate type material of this species.
Sphaerulina patriniae (Miura) Quaedvlieg, Verkley & Crous,
comb. nov. MycoBank MB804415.
Basionym: Septoria patriniae Miura, Flora of Manchuria and East
Mongolia, III Cryptogams, Fungi (Industr. Contr. S. Manch. Rly 27)
3: 465. 1928.
Specimen examined: South Korea, Pocheon, on leaves of Patrinia scabiosaefolia
(Valerianaceae), 20 Aug. 2006, H.D. Shin, KACC 42518 = CBS 128653.
Sphaerulina populicola (Peck) Quaedvlieg, Verkley &
Crous, comb. nov. MycoBank MB804416.
Basionym: Septoria populicola Peck, Ann. Rep. N.Y. St. Mus. 40:
59. 1887.
= Septoria populicola House, Bull. N.Y. St. Mus.: 59. 1920. (nom. illegit.)
= Mycosphaerella populicola C.H. Thomps., Phytopathology 31: 251. 1941.
Specimen examined: USA, Washington, Puyallup, on Populus trichocarpa
(Salicaceae), 2 May 1997, G. Newcombe, CBS 100042.
Fig. 31. Conidia, conidiogenous loci on a hypha, and conidiogenous cells of
Sphaerulina pseudovirgaureae (CBS 135109). Scale bars = 10 µm.
Sphaerulina pseudovirgaureae Quaedvlieg, Verkley &
Crous, sp. nov. MycoBank MB804417. Figs 31, 32.
Etymology: Named after its similarity to Septoria virgaureae.
Conidiomata pycnidial, separate, erumpent, globose, up to 120 µm
diam, dark brown, exusing a creamy conidial cirrhus through central
ostiole, somewhat papillate; wall of 2–3 laters of brown textura
angularis. Conidiophores reduced to conidiogenous cells or with
one supporting cell, subcylindrical, 0–1-septate, branched below
or not, pale brown at base, 10–20 × 3–5 µm. Conidiogenous cells
integrated, hyaline, but pale brown at base, smooth, proliferating
sympodially near apex, 7–17 × 2–3 µm. Conidia solitary,
hyaline, smooth, guttulate, subcylindrical to narrowly obclavate,
scolecosporous, irregularly curved, apex subobtuse, base truncate
or narrowly obconically truncate, 3–10-septate, (30–)40–60(–80) ×
2.5(–3) µm.
Culture characteristics: Colonies spreading, erumpent with sparse
aerial mycelium and smooth, lobate margin and folded surface;
reaching 13 mm diam after 2 wk. On MEA surface saffron with
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