Pleosporales - CBS - KNAW
Pleosporales - CBS - KNAW
Pleosporales - CBS - KNAW
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Fungal Diversity<br />
Karst.) Sacc., and Leuchtmann (1985) transferred this<br />
species to Montagnula sensu lato based on the ascospore<br />
morphology and the hyphae surrounding the ascomata.<br />
Barr (1987b) suggested that ascoma, peridium structure<br />
and ascospore characters pointed Montagnula sensu<br />
stricto to Phaeosphaeriaceae, while the characters of<br />
ascomata and peridium structure of Chaetomastia were<br />
thought to fit the definition of Dacampiaceae (Barr<br />
1987b). In particular, the peridium and ascospore characters<br />
of C. hirtula are comparable with those of the generic<br />
type of Massariosphaeria (M. phaeospora). Thus, Barr<br />
(1989c) accepted Massariosphaeria sensu stricto and<br />
assigned the phragmosporous species of Massariosphaeria<br />
sensu lato to Chaetomastia.<br />
Barr (2002) later assigned Chaetomastia to Teichosporaceae<br />
based on its saprobic or hypersaprobic lifestyle,<br />
occurring on woody stems and peridium structure, and this<br />
is widely followed (Eriksson 2006; Lumbsch and Huhndorf<br />
2007). Currently, 11 species are accepted in this genus<br />
(http://www.indexfungorum.org/).<br />
Phylogenetic study<br />
None.<br />
Concluding remarks<br />
Familial placement of Chaetomastia is undetermined<br />
currently but has been included in the Teichosporaceae<br />
by authoritative sources (Eriksson 2006; Lumbsch and<br />
Huhndorf 2007) or the Dacampiaceae (http://www.<br />
indexfungorum.org/).<br />
Chaetoplea (Sacc.) Clem., Gen. Fung. (Minneapolis): 275<br />
(1931). (?Phaeosphaeriaceae)<br />
≡ Pyrenophora subgen. Chaetoplea Sacc., Syll. fung.<br />
(Abellini) 2: 279 (1883).<br />
Generic description<br />
Habitat terrestrial, saprobic. Ascomata small to medium,<br />
immersed, erumpent to superficial, globose to subglobose,<br />
papillate, ostiolate. Peridium not examined. Hamathecium<br />
of dense, long, narrowly cellular pseudoparaphyses. Asci 8-<br />
spored or 4-spored, bitunicate, fissitunicate, cylindroclavate,<br />
with a thick, furcate pedicel. Ascospores ellipsoid<br />
or fusoid, pale brown to brown, phragmosporous or<br />
muriform.<br />
Anamorphs reported for genus: Microdiplodia-like (Barr<br />
1990b).<br />
Literature: Barr 1981; 1987a; b; 1990b; Clements and<br />
Shear 1931; Ramaley and Barr 1995; Yuan and Barr<br />
1994.<br />
Fig. 22 Chaetoplea calvescens (from FH-81113, isotype). a, b Fourspored<br />
and 8-spored asci. c Released ascospores. Scale bars: a–c=<br />
10 μm<br />
Type species<br />
Chaetoplea calvescens (Fr.) Clem., Gen. Fung. (Minneapolis):<br />
275 (1931). (Fig. 22)<br />
≡ Sphaeria calvescens Fr. Scleromyc. Sueciae 401.<br />
Ascomata not examined. Peridium not examined.<br />
Hamathecium of dense, long, narrow cellular pseudoparaphyses,<br />
2–3 μm broad, septate, branching and anastomosing.<br />
Asci 90–110×10–12 μm, 8-spored, rarely 4-spored,<br />
bitunicate, fissitunicate, cylindro-clavate, with a thick,<br />
furcate pedicel which is up to 30 μm long (Fig. 22a<br />
and b). Ascospores 13–18×5.5–7 μm, obliquely uniseriate<br />
and partially overlapping, broadly fusoid to oblong<br />
with broadly rounded ends, pale brown, 2-3-septate,<br />
constricted at the septa, containing four refractive globules<br />
(Fig. 22c).<br />
Note: The specimen is only a slide, and no peridium or<br />
ascomata information could be obtained.<br />
Anamorph: coelomycetous, conidia yellowish, 1-<br />
septate, 9–13×4–5(−8) μm (Webster and Lucas 1959);<br />
Microdiplodia henningsii Staritz=Chaetodiplodia caudina<br />
Karst. (Sutton 1980) (referred to Barr 1990b (p50)).<br />
Material examined: SWEDEN, sub-collection: Curtis<br />
Herbarium, verified by R.A. Shoemaker, leg. E.M. Fries<br />
401 (FH-81113, isotype, microscope slide).<br />
Notes<br />
Morphology<br />
Chaetoplea was introduced based on C. calvescens,<br />
which has been regarded as similar to Pleospora or<br />
Leptosphaeria (Eriksson and Hawksworth 1987;<br />
Wehmeyer 1961; von Arx and Müller 1975). Based on<br />
the differences in ascomata, peridium structure, pseudoparaphyses<br />
as well as its anamorphic stage, Chaetoplea<br />
was maintained as a separate genus (Barr 1990b;<br />
Yuan and Barr 1994). Chaetoplea sensu lato was<br />
accepted by Barr (1990b), which included some species<br />
of Teichospora as well as the subgenus Pleospora subg.<br />
Cylindrosporeae.<br />
The following is from the label of specimen.<br />
“Sphaeria calvescens, Scler. Suecicae (Ed. 2) 401. No<br />
specimen of Scler. Suecicae 401 is now at Uppsala<br />
according to R. Santesson 1966. This Curtis Herbarium<br />
specimen in the Farlow Herbarium is isotype.<br />
Wehmeyer (1961) in his Pleospora monograph did<br />
not study any portion of the Scler. Suecicae exsiccatus<br />
b
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