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Pleosporales - CBS - KNAW

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Fungal Diversity<br />

Fig. 21 Chaetomastia hirtula (from H, FFE 825, kleptotype). a<br />

Superficial ascomata gregarious on the host surface. b Section of a<br />

partial peridium. Note the cells of textura angularis with relatively<br />

thick wall. c, d Cylindrical asci with long and furcate pedicels. e, f<br />

Brown, 3-septate ascospores. Scale bars: a=0.5 mm, b=50 μm, c–f=<br />

15 μm<br />

Anamorph: none reported.<br />

Material examined: FINLAND, ETELÄ-HÄME (EH/<br />

Ta), Tammela, Mustiala, På Rub. id., 8 May 1866. P.A.<br />

Karsten (H, FFE 825, kleptotype).<br />

Notes<br />

Morphology<br />

Chaetomastia was introduced by Saccardo (1883) asa<br />

subgenus of Melanomma, and five species were included,<br />

i.e. M. canescens Speg., M. cucurbitarioides Speg.,<br />

M. hirtulum (P. Karst.) Sacc., M. hispidulum Sacc. and<br />

M. pilosellum P. Karst. Berlese (1890) promoteditto<br />

genus rank. Subsequently, Chaetomastia hirtula (P.<br />

Karst.) Berl. was selected as the lectotype species of<br />

the genus (Clements and Shear 1931). Chaetomastia has<br />

been regarded as having unitunicate asci (Eriksson and<br />

Hawksworth 1986, 1998; Eriksson 1999). However its<br />

bitunicate status was confirmed by Holm (1957). Holm<br />

(1957) treated C. hirtula as Melanomma hirtulum (P.

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