Fungal Diversity
Dinemasporium (coelomycetes)
Junxin Duan1,2, Wenping Wu2* and X.Z. Liu1
1
Institute of Microbiology, The Chinese Academy of Science, Beijing 100085, PR China
2
Novozymes China, 14 Xinxi Lu, Shangdi Zone, Haidian District, Beijing 100085, PR China
Duan, J.X., Wu, W.P. and Liu, X.Z. (2007) Dinemasporium (coelomycetes). Fungal Diversity
26: 205-218.
Seven species of the genus Dinemasporium Lév. are described and illustrated, including
Dinemasporium asetulum sp. nov., D. fusiforme sp. nov., D. ligongense sp. nov., D. sinense sp.
nov. and D. neottiosporioides (Agnihothr.) comb. nov. A key to accepted species in the genus
is given. The type specimens for all described new species are kept in the herbarium of W.P.
Wu in Novozymes China.
Key words: Dinemosporium, new species, saprobes
Introduction
Dinemasporium was erected by Léveillé (1846) with D. graminum (Lib.)
Lév. as the type species. It is characterized by superficial, cupuliform
conidiomata with setae; “phialidic” conidiogenous cells; and hyaline, oblong to
allantoid conidia with one setulae at each end (Saccardo, 1884; Sutton, 1980;
Nag Raj, 1993). Saccardo (1884) divided the genus into two subgenera: Eu-
Dinemasporium Sacc. with setulae occurring only at the end of conidia and
Stauronema Sacc. with the conidia bearing setulae both at the ends and also the
middle part. The subgenus Stauronema was restated by Sutton (1980) as the
well-defined genus Stauronema. Dinemasporium is a comparatively large
heterogeneous genus with 57 published names (including species, variety and
forma, of which 7 were accepted species, 9 were listed as synonyms of
Dinemasporium species, 20 were excluded from Dinemasporium and 21
remained to be determined (Sutton, 1980; Nag Raj, 1993). Since then 2 new
species and one new combination have been added to the genus (Matsushima,
1995; Furlanetto and Dianese, 1998; Yamaguchi et al., 2005). Some accepted
species including D. strigosum (Pers.) Sacc., D. aberrans B. Sutton, D.
cytosporioides (Sacc.) B. Sutton, D. decipens (De Not.) Sacc., D. duguetiae
Furlan. & Dianese, D. lanatum Nag Raj & R.F. Castañeda., D. longicapillatum
*
Corresponding author: Wenping Wu; e-mail: WUWP@novozymes.com
205
Yamaguchi & Masuma were fully described and illustrated (Webster, 1955;
Sutton, 1965, 1969, 1980; Morgan-Jones, 1971; Nag Raj, 1978, 1993; Nag Raj
and Kendrick, 1986; Nag Raj and Castañeda, 1989; Furlanetto and Dianese,
1998; Yamaguchi et al., 2005). Keys to several accepted species were also
provided by Sutton (1980), Nag Raj (1993) and Furlanetto and Dianese (1998).
Only one species, Dinemasporium strigosum has a teleomorph (Webster,
1955; Kendrick and Dicosmo, 1979). This teleomorph, Phomatospora
dinemasporium J. Webster, has immersed perithecia, cylindrical, short-stalked,
4-8 spored asci, and hyaline, smooth, big guttulate, narrowly elliptical to
spindle-shaped or slightly inequilateral ascospores that are typically uniseriate
in the asci. However, Rappaz (1992) believed that Webster's fungus did not
belong to Phomatospora. Phomatospora has a structured apex to the asci and
striately ornamented ascospores, two features not mentioned by Webster
(1955), but considered to be very important. In two other typical species of
Phomatospora the anamorphs are hyphomycetes with holoblastic, sympodial
conidiogenous cells, and ellipsoidal to Fusarium-like conidia that are quite
different to the anamorph of P. dinemasporium which produces a coelomycete
anamorph with cupulate, gregarious conidiomata, enteroblastic, phialidic
conidiogenous cells and allantoid conidia with one setulae at each end. The
taxonomic position of P. dinemasporium needs to be revised.
During a study on coelomycetes from China, several specimens with
cup- or cone-shaped conidiomata bearing setae and producing hyaline, aseptate
or septate, appendaged conidia were collected. Preliminary identification
showed that they belong to several similar genera including Dinemasporium
Lév., Pseudolachnea Ranoj. and Stauronema (Sacc.) Syd., P. Syd. & E.J.
Butler (Sutton, 1980; Nag Raj, 1993). Results from a study of these
Dinemasporium collections from China and of some unidentified specimens in
Herbarium IMI are reported in this contribution.
Dinemasporium Lév., Ann. Sci. nat., Sér.3, 5; 274 (1846)
Dendrophoma Sacc., Michelia 2:4 (1880)
Pycnidiochaeta Sousa da Câmara, Agron. Lusit. 12:109 (1950)
Amphitiarospora Agnihothr., Sydowia 16:75 (1962, published 1963)
Type species: D. strigosum (Pers. ) Sacc.
Key to accepted species of Dinemasporium
1. Conidia pale brown to brown................................................................................. D. aberrans
1. Conidia colorless..................................................................................................................... 2
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Fungal Diversity
2. Conidia 13-27 µm long ...........................................................................................D. lanatum
2. Conidia less than 15 µm long.................................................................................................. 3
3. Conidiomata with two types of setae ..................................................................D. ligongense
3. Conidiomata with one type of setae ........................................................................................ 4
4. Conidia without setulae..........................................................................................D. asetulum
4. Conidia with setulae................................................................................................................ 5
5. Conidia with setulae more than 5 µm long ............................................................................. 6
5. Conidia with setulae less than 5 µm long................................................................................ 8
6. Conidia fusiform, straight, 2.5-3.5 µm wide .........................................................D. fusiforme
6. Conidia curved ........................................................................................................................ 7
7. Conidia 8-12.5 x 1.5-2.5 µm, appendage 6.5-9 µm long ..................................... D. strigosum
7. Conidia 8-11 x 2-2.7 µm, appendage 11-20 µm long .................................D. longicopillatum
8. Setulae less than 2 µm long..................................................................................................... 9
8. Setulae 1.5-4 µm long ........................................................................................................... 13
9. Conidia more than 6 µm long ............................................................................................... 10
9. Conidia less than 6 µm long.................................................................................................. 11
10. Conidia 6-11 x 1.2-1.5 µm ..................................................................................... D. sinense
10. Conidia 7-9.5 x 2.5-5 µm ................................................................................... D. duguetiae
11. Conidia 1-1.5 µm wide..................................................................................D. cytosporoides
11. Conidia 1.5-2.1 µm wide..................................................................................................... 12
12. Conidia 3.5-5 x 1.5-2 µm ..........................................................................................D. affine
12. Conidia 3.5-5.6 x 1.7-2.1 µm ..................................................................D. neottiosporioides
13. Conidia 8-12.5 x 2.5-3.5 µm ........................................................................D. rhodophaeum
13. Conidia 4.5-9 x 2-2.5 µm .................................................................................... D. decipiens
Dinemasporium asetulum J.X. Duan & W.P. Wu, sp. nov. (Figs 1-5)
MycoBank: 510713.
Mycelium immersum cum hyphis septatis, ramosis, laevibus, brunneis. Conidiomata
eustromatica, navicularia usque cupulata, superficialia, dissita, setosa, nigra, 70-150 µm diam;
stromata pseudoparenchymata, cum textura angularis et porrecta lateralis. Setae cylindricae,
erectae, rectae, vel fleuosae, atro-brunneae ad basim et dilute brunneae ad apicem, 280-420 ×
7-9 µm. Conidiophora ramose, septata, cylindrica, dilute brunneae, in basim conidiomati
disposita, 35-45 × 1.5-3 µm. Cellulae conidiogenae monophialidicae, integratae, determinatae,
plerumque clavatae, cylindricae, inflatae ad apicem, leaves, dilute brunneae, cum minute collo,
7-14 x 2-3 µm. Conidia falcata, curvata, utrimque obtuse, aseptata, levia, hyalina, 7-9 × 1.5-2
µm.
207
Mycelium immersed, composed of septate, branched, smooth and brown
hyphae. Conidiomata eustromatic, scattered of aggregated, superficial,
blackish, cupulate to discoid, 70-150 µm diam., basal wall of textura porrecta,
composed of long, brown cells but with a thin layer of textura angularis of
brown, isodiametric cells. Setae abundant, dark brown at base, pale brown at
apex, straight or flexuous, tapered towards the acute apex, smooth, septate,
simple, 280-420 × 7-9 µm. Conidiophores septate, branched at the base, pale
brown, cylindrical, 35-45 × 1.5-3 µm, arising from both basal and lateral walls.
Conidiogenous cells holoblastic, monophialidic, determinate, integrated,
formed from the apex of conidiophores, slightly clavate, cylindrical, pale
brown, wall thin and smooth, apex wide with prominent collar, 7-14 × 2-3 µm.
Conidia hyaline, aseptate, falcate, apex acute, base truncate, wall thin and
smooth, 7-9 × 1.5-2 µm.
Habitat: On rotten wood.
Known distribution: Ghana.
Figs 1-5. Dinemasporium asetulum sp. nov. (from holotype specimen). 1. Vertical section of a
conidioma. 2. Setae. 3. Vertical section of conidioma wall. 4. Conidiophores and
conidiogenous cells. 5. Conidia. Scale bars = 20 µm applies to all figs.
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Fungal Diversity
Material examined: Ghana: Aburi, Gold Coast Colony, on rotten wood of unidentified
plant, 24 May 1949, S.J. Hughes (801), IMI38861 (holotype).
Notes: Placement of Dinemasporium asetulum might be argued against
due to morphological differences from other members of the genus including
its basal stroma of textura porrecta, dark coloured conidiophores and
conidiogenous cells, and asetulate conidia. However, at present there is no
other genus in which this species could be better included.
Dinemasporium decipens (De Not.) Sacc., Michelia 2:282 (1881).
Excipula decipiens De Not., Atti. Accad. Tor. ser. 2, 10:170 (1849)
Dinemasporium acerinum Peck, 26th Rep.: 77 (1874)
Dinemasporium robiniae W.R. Gerard, Annual Rep. New York State Mus. 25: 88
(1871); Syll. Fung. 3: 685 (1884)
Mycelium immersed, composed of septate, branched, smooth and brown
hyphae. Conidiomata stromatic, scattered to gregarious, superficial, black,
cupulate to discoid with lateral prosenchymatic wall of textura porrecta
composed of hyaline to pale coloured, septate hyphae in the inner layer and
brown, septate hyphae in the outer layer; basal wall of textura angularis
composed of pale brown to hyaline and thin-walled cells in the upper layer and
of brown, thick-walled and isodiametric cells in the lower layer, 150-600 µm
diam. Setae brown to dark brown, tapering to an acute or rounded apex,
unbranched, septate, wall thick and smooth, arising from the outer layer of
basal stroma and sometimes from the outer layer of lateral excipulum, 55-230
× 4.5-8.5 µm. Conidiophores hyaline, smooth-walled, septate, branched at the
base, cylindrical, formed from the upper cells of basal stroma, 10-30 × 1.5-2.5
µm. Conidiogenous cells enteroblastic, phialidic, hyaline, determinate,
cylindrical with a slightly tapered apex, apical channel minute and collarette
not prominent, 8-20 × 1.5-2.5 µm. Conidia hyaline, aseptate, eguttulate or
guttulate, naviculate, curved or straight, wall smooth, ends obtuse, 5.5-8 × 2.5-
3 µm, setulae straight or curved, unbranched, 1.5-4 µm long.
Description and illustration: Nag Raj (1993), Wu (1993).
Habitat: On dead culms of herbaceous plants; dead twigs and rotten wood.
Known distribution: Canada, China, Commonwealth of Independent States (Former
U.S.S.R.), Czechoslovakia, Italy, U.S.A. (Nag Raj, 1993).
Material examined: China: Shaanxi Province, on dead branch of Acer sp., 11 October
1992, Wu Wenping, Wu1533; China: Hebei, Shijiazhuang, on dead branched of Sophor
japonica L., 10 September 1990, Wu Wenping, Wu1529; China: Shaanxi Province, on dead
branches of Syringa sp., 3 October 1992, Wu Wenping, Wu1512; China: Shaanxi Province,
Xian, on unidentified hosts, 10 October 1992, Wu Wenping, Wu1537, Wu1541, Wu1546;
China: Liaoning Province, on unidentified hosts, 8 Aug. 1993, Wu Wenping, Wu0571.
Notes: Dinemasporium decipens is a common species on dead twigs and
wood of many deciduous trees such as Acer, Ailanthus, Fraxinus, Robinia, etc.
It has a wide distribution (Nag Raj, 1993).
209
Dinemasporium acerinum Peck reported in China by Teng (1963) and
Wu (1993) should be transferred to D. decipiens. The type specimen of D.
decipiens (IMI94869, slide ex Herb. K) was examined by us and found to be
identical to our collections in all characters. The type specimen of D. robinae
W.R. Gerard (IMI94857, slide ex Herb. K) was also examined and it was
concluded that it is conspecific with D. decipiens.
Dinemasporium fusiforme W.P. Wu & J.X. Duan, sp. nov. (Figs 6-9)
MycoBank: 510714
Mycelim immersum cum hyphis septatis, ramosis, laevibus, brunneis. Conidiomata
eustromatica, navicularia usque cupulata, superficialia, dissita, setosa, nigra, 150-350 µm diam;
stromata pseudoparenchymata, cum textura angularis et porrecta lateralis. Setae cylindricae,
erectae, rectae, atro-brunneae ad basim et dilute brunneae ad apicem. Conidiophora ramose,
septata, cylindrical, hyalinae, in basim conidiomati disposita, 10-30 × 2-3.5 µm. Cellulae
conidiogenae monophialidicae, integratae, determinatae, cylindricae, lageniformiae, inflatae ad
apicem, leaves, hyalinae, cum minute collo, 7-16 × 2.5-3.5 µm. Conidia fusiformia, curvata,
utrimque obtuse, aseptata, levia, guttulata, hyalina, 8.5-10.5 × 2.5-3.5 µm, utrimque 1 setulo
non ramose praedita, 7-11 µm longa.
Mycelium immersed, composed of septate, branched, smooth and brown
hyphae. Conidiomata eustromatic, separate or rarely aggregated, superficial,
black, at first conical and closed, then opening out to become flattened
cupulate or conical, 150-350 µm diam, basal wall of textura angularis, reduced,
composed of hyaline to pale brown, irregular, isodiametric cells in 1-3 layers;
periclinal wall of textura porrecta, formed by brown to dark brown, thick-
walled, elongated hyphal cells and tending into textura angularis towards the
inner layers and the base. Setae dark brown to blackish at base, pale brown at
apex, simple, septate, straight, cylindrical, tapering towards an acute or obtuse
apex. Conidiophores hyaline, branched at the base, septate, cylindrical, 10-30 ×
2-3.5 µm, formed from the inner layer of basal and the lower part of lateral
wall. Conidiogenous cells integrated, determinate, hyaline, terminal,
subcylindrical, cylindrical, lageniform, with a wide opening, wall thin and
smooth, collarette minute, channel wide, periclinal thickening distinctive, 7-16
× 2.5-3.5 µm, tapering to 2-2.5 µm at the apex. Conidia holoblastic, hyaline,
aseptate, fusiform, straight or rarely slightly curved, ends acute to obtuse, wall
thin and smooth, guttulate, 8.5-10.5 × 2.5-3.5 µm; setulae simple, straight or
curved, one each end, 7-11 µm.
Habitat: On rotten wood.
Know distribution: Sierra Leone.
Material examined: Sierra Leone: Bumpe, on rotten wood of Chasmopodium candatum,
21 Oct. 1954, IMI58513 (holotype).
Notes: Dinemasporium rhodophaeum Speg. and D. strigosum are similar
to D. fusiforme. However, D. rhodophaeum has naviculate to subfusiform
conidia with a much shorter appendage (2-6 µm long) (Nag Raj, 1993). In D.
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Fungal Diversity
strigosum, the conidia are naviculate and narrower (1.5-2.5 µm wide) (Sutton,
1980). Conidiomata of D. fusiforme are different from those in other species of
Dinemasporium showing similarity with fruit bodies in the genus
Pseudolachnea Ranoj where they have a wide flattened base and at first are
thin conical and then open to become flattened, cupulate or truncate cone with
periclinal setae (Sutton, 1980).
Figs 6-9. Dinemasporium fusiforme sp. nov. (from holotype). 6. Vertical section of a
conidioma; 7. Setae. 8. Conidiophores and conidiogenous cells. 9. Conidia. Scale bars = 20 µm
applies to all figs.
Dinemasporium ligongense W.P. Wu, J.X. Duan & X.Z. Liu, sp. nov.
MycoBank: 510715 (Figs 10-15)
Myceluim immersum cum hyphis septatis, ramosis, laevibus, brunneis. Conidiomata
eustromatica, navicularia usque cupulata, superficialia, dissita, setosa, nigra, usque 2 mm longa
et 1 mm crssae; stromata pseudoparenchymata, cum textura angularis et porrecta lateralis.
Setae inconspicuae cylindricae, curvata, septatae, leaves vel interdum, atro-brunneae ad basim
et dulute brunneae ad apicem, 0-1 setptata, 25-40 × 1-1.5 µm. Setae conspicuae cylindricae,
erectae, rigidae, atro-brunneae ad basim et dilute brunneae ad apicem, 110-750 × 3-5 µm.
211
Conidiophora ramose, septata, cylindrical, hyalinae, in basim conidiomati disposita. Cellulae
conidiogenae monophialidicae, discretae, determinatae, cylindricae vel inflatae ad apicem,
laeves, hyalinae, cum minute collo, 8-16 × 1-1.8 µm. Conidia naviculata, curvata, utrimque
obtuse, aseptata, levia, eguttulata, hyalina, 6.3-8 × 1.2-2 µm, utrimque 1 setulo non ramose
praedita, 2.5-4 µm longa.
Mycelium immersed, composed of septate, branched, smooth and brown
hyphae. Conidiomata eustromatic, superficial, scattered or aggregated,
naviculate, cupulate to discoid but oblong to ovoid shaped in top view, black,
up to 2 mm long and 1 mm wide; lateral wall of textura porrecta formed by
hyaline to pale brown cells in the inner layer and brown to dark brown cells in
the outer layer, the apex of the outer wall extended into brown but becoming
pale brown at the apex, aseptate or 1-septate, curved inconspicuous setae that
are 25-40 × 1-1.5 µm; basal stroma of textura angularis with brown,
isodiametric cells which are hyaline in the upper layer. Conspicuous setae
brown to black at the base, tapered and paler towards the subacute apices
septate, straight, rigid, cylindrical, tapering, apex acute or obtuse, wall thick
and smooth, 110-750 × 3-5 µm, arising from the outer layer of basal and lateral
walls. Conidiophores hyaline, septate, simple to branched, aseptate or septate,
wall smooth, cylindrical, originating from the upper cells of basal stroma and
also inner layer of lateral walls. Conidiogenous cells enteroblastic, phialidic,
determinate, integrated, hyaline, wall smooth, cylindrical with minute
periclinal thickenings in the collarette zone, collarette inconspicuous, 8-16 × 1-
1.8 µm. Conidia hyaline, aseptate, naviculate, curved or straight, smooth-
walled, ends obtuse, 6.3-8 × 1.2-2 µm, with a 2.5-4 µm long and unbranched
setula at each end.
Habitat: On dead culms of herbaceous plant.
Know distribution: China.
Material examined: China: Hebei Province, Chengde, on dead culms of unidentified
herbaceous plant, 12 September 1991, Wu Wenping, Wu910508a (holotype); China: Heibei
Province, Chengde, on dead culms of herbaceous plants, 12 September 1991, Wu Wenping,
Wu910503, Wu910517; 05 October 1991, Wu Wenping, Wu0535, Wu0536, Wu0555; China:
Yunnan Province, Kunming, 09 March 1994, Wu Wenping, Wu0559a.
Notes: Dinemasporium ligongense differs from all other species in the
genus by its two types of setae on conidiomata. Several species including D.
decipiens, D. rhodophaeum, D. affine Speg. and D. aberrans have similar
conidial morphology to D. ligongense (Sutton, 1965, 1980; Nag Raj, 1993).
However, the conidia in D. aberrans are pale brown to brown with longer
setulae (5.5-7 µm); the conidia of D. affine are smaller (3.5-5 × 1.5-2 µm) with
shorter setulae (1.5 µm long); the conidia of D. rhodophaeum are larger (8-
12.5 × 2.5-3.5 µm), the conidia of D. decipiens are wider (2-2.5 um) (Grove,
1937; Sutton, 1969,1980; Nag Raj, 1993).
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Fungal Diversity
15
13
14
12
11 10
11
Figs 10-15. Dinemasporium ligongense sp. nov. (from holotype). 10-11. Vertical section of a
conidioma. 12-13. Two types of setae. 14. Conidiophores and conidiogenous cells. 15.
Conidia. Scale bars = 20 µm applies to all figs.
Dinemasporium neottiosporioides (Agnihothr.) W.P. Wu, comb. nov.
MycoBank 510716 (Figs 16-19)
Amphitiarospora neottiosporioides Agnihothr., Sydowia 16:75 (1962)(1963)
Mycelium immersed, composed of septate, branched, smooth and brown
hyphae. Conidiomata superficial, black, scattered or rarely aggregated,
cupulate, 80-120 µm diam, basal wall of textura angularis composed of hyaline
to brown, thick- or thin-walled cells, lateral wall of textura porrecta and
composed of hyaline to dark brown, long, septate and branched hyphae. Setae
few, straight, tapered towards a acute apex, simple, septate, dark brown, arising
213
from the outer layer of lateral and basal wall, wall thick and smooth, 75-210 ×
6-9 µm. Conidiophores hyaline, aseptate or septate, branched or unbranched,
cylindrical, wall smooth, 10-14 × 1.2-1.8 µm, formed from inner layer of both
lateral and basal wall. Conidiogenous cells enteroblastic, phialidic,
determinate, integrated, hyaline, apical, cylindrical, straight, wall smooth, apex
wide with a prominent collar or not, 7-10 × 1.2- 2 µm. Conidia hyaline,
aseptate, naviculate to fusiform, curved, apex acute, base truncate, 3.5-5.6 ×
1.7-2 µm, bearing one setulae of 0.5-1 µm long at each end.
Description and illustration: Agnihothrudu (1962).
Habitat: On dead twig.
Known distribution: India.
Material examined: India: Jocklai, on Camelia sinense L., 10 December 1957, V.
Agnihothrudu & G.C.S. Barua (no.1, 160), IMI201221 (holotype); 10 February 1976, G.C.S.
Barua (no2), IMI201222.
19
18
17
16
Figs 16-19. Dinemasporium neottiosporioides (from holotype specimen). 16. Vertical section
of a conidioma. 17. Setae. 18. Conidiophores and conidiogenous cells. 19. Conidia. Scale bars
= 20 µm applies to all figs.
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Fungal Diversity
Notes: Sutton (1977) concluded that Amphitiarospora Agnihothr. was a
synonym of Dinemasporium, based on a study of the type specimen, but a valid
combination has not been made to date. The setose excipuliform
fructifications, branched, septate phialidic conidiophores and setulae conidia in
A. neottiosporioides are typical of Dinemasporium (Sutton, 1977) and a
comparative study with other species in the genus Dinemasporium shows it
differs from all other described species by its smaller conidia with shorter
appendages (Agnihothrudu, 1962; Sutton, 1965, 1969, 1980; Nag Raj, 1993).
Dinemasporium sinense W.P. Wu, J.X. Duan & X.Z. Liu, sp. nov.
MycoBank: 510717 (Figs 20-24).
Mycelium immersum cum hyphis septatis, ramosis, laevibus, brunneis. Conidiomata
eustromatica, navicularia usque cupulata, superficialia, dissita, setosa, nigra, usque 0.3-1.2 mm
longa et 200-500 µm crassae; stromata pseudoparenchymata, cum textura angularis et porrecta
lateralis. Setae cylindricae, erectae, rectae, atro-brunneae ad basim et dilute brunneae ad
apicem, 200-600 × 5.5-8 µm. Conidiophora ramose, 1-septata, cylindricae, hyalinae, laevibus,
in basim conidiomati disposita, 7-12 × 1.2-2 µm. Cellulae conidiogenae monophialidicae,
integratae, determinatae, cylindricae, inflatae ad apicem, leaves, hyalinae, cum minute collo, 5-
12 × 1.2-2 µm. Conidia naviculatae, curvata, utrimque obtuse, aseptata, levia, guttulata,
hyalina, 6-11 × 1.2-1.5 µm, utrimque 1 setulo non ramose praedita, 0.5-1.2 µm longa.
Mycelium immersed, composed of smooth-walled, brown, branched,
septate hyphae. Conidiomata eustromatic, unilocular, superficial, scattered to
aggregated, setose, black, naviculate, cupulate to discoid, ellipsoid to spherical
on the top view, 0.3-1.2 mm long and 200-500 µm wide; basal wall of textura
angularis composed of brown, thick-walled, isodiametric cells that are hyaline
and thin-walled on the upper layer; lateral wall of textura prismatica with
thick-walled, brown to dark brown, elongated cells, well developed or poorly
developed. Setae dark brown, paler towards the apex, septate, simple, wall
thick and smooth, straight, cylindrical, tapered towards the acute or obtuse
apex, 200-600 × 5.5-8 µm. Conidiophores hyaline, 1-septate, branched, wall
thin and smooth, cylindrical, 7-12 × 1.2-2 µm, formed from the basal part of
the conidiomata. Conidiogenous cells enteroblastic, monophialidic,
determinate, integrated, hyaline, thin- and smooth-walled, cylindrical with a
marked periclinal thickening around the apical channel, the collar is
inconspicuous, 5-12 × 1.2-2 µm. Conidia hyaline, aseptate, naviculate, end
rounded, curved, wall smooth and thin, 6-11 × 1.2-1.5 µm, with one setulae
0.5-1.2 µm long.
Habitat: On dead culms of grasses.
Known distribution: China.
Material examined: China: Hebei Province, Chengde, on dead culms of unidentified
grass, 12 September 1991, Wu Wenping, Wu525 (holotype); China: Hebei Province, Chengde,
on dead culms of unidentified grass, 12 September 1991, Wu Wenping, Wu0552; 11
September 1991, Wu Wenping, Wu0521, Wu0551, Wu0553.
215
Notes: Dinemasporium cytosporioides is the only species similar to D.
sinense. However, the conidia of D. cytosporioides are smaller (3.5-5 × 1 µm),
as are the conidiomata (120-150 µm diam.).
24
22
23
21 20
Figs 20-24. Dinemasporium sinensis sp. nov. (from holotype). 20-21.Vertical section of a
conidioma. 22. Setae. 23. Conidiophores and conidiogenous cells. 24. Conidia. Scale bars = 20
µm applies to all figs.
Dinemasporium strigosum (Pers.) Sacc., Michelia 2:281 (1881)
Peziza strigosa Pers. : Fr., Syst. Mycol. 2:103 (1882)
Dinemasporium graminum (Lib.) Lév., Ann. Sci. nat., 3 Sér., 5:274 (1846)
Other synonyms see Sutton (1980) and Nag Raj (1993).
Mycelium immersed, composed of septate, branched, smooth and brown
hyphae. Conidiomata eustromatic, superficial, black, cupulate, ellipsoid to
spherical in top view, 150-800 µm in diam; basal stroma of textura angularis
composed of hyaline to brown, isodiametric cells; lateral wall of textura
prismatica to textura porrecta formed by brown, thick-walled cells that are
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Fungal Diversity
hyaline towards the inner layer. Setae brown to black, simple, septate,
cylindrical with a acute or obtuse apex, wall thick and smooth, 100-850 × 3-6.5
µm, arising from basal part of conidiomata or sometimes from lateral
excipulum. Conidiophores hyaline, septate, branched or unbranched,
cylindrical, wall thin and smooth, 10-30 × 1.5-2.5 µm. Conidiogenous cells
enteroblastic phialidic, determinate, hyaline, cylindrical, apex with narrow
channel and a inconspicuous collar, 8-20 × 1.5-2.5 µm. Conidia hyaline,
aseptate, wall thin and smooth, naviculate to fusiform, curved or straight, ends
rounded, eguttulate or guttulate, 8-12.5 × 2-2.5 µm, with a single, unbranched
setulae at each end, 6.5-9 µm long.
Description and illustration: Webster (1955), Sutton (1980), Nag Raj (1993).
Habitat: On dead grasses, dead twigs and rotten wood.
Known distribution: Worldwide (Sutton, 1980; Nag Raj, 1993)
Material examined: On many different substrata and widely distributed in China.
Specimens no. Wu0501, 0502, 0503, 0505, 0506, 0507, 0508, 0509, 0510, 0511, 0513, 0514,
0518, 0519, 0520, 0527, 0530, 0532, 0538, 0539, 0543, 0545, 0548, 0550, 0554, 0557,
HMAS33611(S), HMAS01437, HMAS06649, HMAS33255(S) and distributed in Beijing,
Fujian, Hebei, Jiangsu, Liaoning, Shaanxi, Yunnan.
Notes: A full account of this species was given by Webster (1955),
Sutton (1977, 1980) and Nag Raj (1993). A comparison between D. strigosum
and some closely related species including D. longicapillatum Y. Yamaguchi
& Masuma was given by Yamaguchi et al. (2005). In the Chinese literature, the
species was reported under the name D. graminum var. strigosulum Karsten on
Gramineae (Teng, 1963; Tai, 1979). Webster (1955) restudied Karsten's
specimens of D. graminum var. strigosulum and confirmed it did not belong to
the genus Dinemasporium. For this reason, Webster pointed out that there was
no foundation for maintaining D. graminum var. strigosulum. Teng’s
specimens of D. graminum var. strigosulum in HMAS were reexamined by us
and all of them meet the description of D. strigosum as given by Sutton (1980).
Acknowledgments
We are indebted to Dr. Eric H.C. McKenzie (New Zealand Fungal Herbarium (PDD),
Landcare Research, Auckland) for kindly reviewing the manuscript.
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(Received 25 August 2006; accepted 27 March 2007)
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