Cyclostoma asteliae (P.R. Johnst.) P.R. Johnst. 2024
Show more
Details
Cyclostoma asteliae (P.R. Johnst.) P.R. Johnst. in Johnston & Park, FUSE 14 158 (2024)
Cyclostoma asteliae (P.R. Johnst.) P.R. Johnst. 2024
Nomenclature
(P.R. Johnst.) P.R. Johnst.
P.R. Johnst.
P.R. Johnst.
2024
158
ICN
species
Cyclostoma asteliae
Classification
Synonyms
Associations
Descriptions
ADDITIONAL SPECIMENS EXAMINED: 6 Collections were examined in addition to the holotype. All were from New Zealand, and included: AUCKLAND; Waitakere Ra., Fairy Falls Track, on Astelia solandri, P. R. Johnston, G. J. Samuels, R. Korf, J. Paden, 13 Aug 1981 (PDD 41862); Waitakere Ra., Old Coach Trail, on Astelia trinervia Kirk, P. R. Johnston, G. J. Samuels, K. Haggerty, 24 Aug 1982 (PDD 42934). GISBORNE: Lake Waikaremoana, Black Beech Track, on Astelia solandri, P.R. Johnston, E. Horak, 23 May 1981 (PDD 41860).
Ascocarps deeply immersed, urceolate, semi-erumpent, 0.5-1.2 mm diam., opening relatively narrow, round; crystalline margin wide, entire, greyish in colour. Margin in cross-section 150 µm wide. Crystals forming a 120-130 µm wide, wedge-shaped layer at top of margin. Wall layer 5-10 µm wide, extending from top of margin and under subhymenium, comprising pale brown, thin-walled, 2-4 µm diam. hyphae. Wall surrounded by 40-60 µm wide stromatic layer, comprising dark brown, thick-walled, irregularly orientated hyphae. Periphyses 30-40 x 2-3 µm, mostly unbranching. Subhymenium faintly amyloid in some collections. Paraphyses 1-1.5 µm diam., not differentiated at tips, non-amyloid. Asci 420-520 x 6-8µm, cap 4-6 µm thick with a central pore, 8-spored. Spores 380-610 x 3-4.5 µm, cells 3-4.5 µm long, sometimes with an indistinct gelatinous sheath.
Characteristics in culture: Ascospores germinating on agar plates in 3-4 days, forming colonies on OA 1.5-3 cm diam. after 5 weeks. Aerial mycelium dense, cottony, white to pale pink. Pycnidia globose, 300-500 µm diam., forming on agar surface, dark-walled, opening by an irregular split in the wall. Pycnidial wall comprising tangled, dark brown, gelatinous, 2 µm diam. hyphae. Conidiogenous cells arising from inner wall layers, cylindric, 7-9 x 1.5-3 µm, hyaline, phialidic, solitary or on short, unbranching conidiophores, apertures apical, or lateral and immediately below transverse septa. Conidia acropleurogenous, 6-12 (-14) x 1-1.8 (-2) µm, cylindric with rounded ends, hyaline.
Characteristics in culture: Ascospores germinating on agar plates in 3-4 days, forming colonies on OA 1.5-3 cm diam. after 5 weeks. Aerial mycelium dense, cottony, white to pale pink. Pycnidia globose, 300-500 µm diam., forming on agar surface, dark-walled, opening by an irregular split in the wall. Pycnidial wall comprising tangled, dark brown, gelatinous, 2 µm diam. hyphae. Conidiogenous cells arising from inner wall layers, cylindric, 7-9 x 1.5-3 µm, hyaline, phialidic, solitary or on short, unbranching conidiophores, apertures apical, or lateral and immediately below transverse septa. Conidia acropleurogenous, 6-12 (-14) x 1-1.8 (-2) µm, cylindric with rounded ends, hyaline.
Habitat: Commonly found on dead leaves of Astelia species.
Ascocarpi immersi, profunde cupulati, 0.5-1.2 mm diam., margine integro, griseo, in sectione transversali 150 µm crasso. Stratum crystallinum 120-130 µm crassum. Stratum parietis et stroma 40-60 µm crassa, hypharis 2-4 µm diam., brunneis. Periphysoidea 30-40 x 2-3 µm, non ramosa. Paraphyses filiformes, simplices, in iodo non caerulescentes. Asci 420-520 x 6-8 µm, apice 4-6 µm crassi, 8-spori. Sporae 380-610 x 3-4.5µm, cellulis 3-4.5 µm longis. Status conidialis: Coleophoma-similis.
Holotypus: PDD 41859 ex Astelia solandri A. Cunningham
Holotypus: PDD 41859 ex Astelia solandri A. Cunningham
Etymology: asteliae; refers to the host plant. Stictis trinervia is another dark-walled Stictis species found on Astelia leaves; for differences between the 2 species see notes under S. trinervia. S. asteliae can be separated from S. subiculata, the other dark-walled Stictis with a stromatic outer wall layer, by the external appearance of the ascocarps (only S. subiculata has a hyphal subiculum surrounding the ascocarp), and differences in ascospore and conidial width. S. subiculata has not been found on Astelia.
Holotype: New Zealand: GISBORNE: Lake Waikaremoana, Aniwaniwa Falls Track, on Astelia solandri, P.R. Johnston, E. Horak, 28 May 1981 (PDD 41859).
Taxonomic concepts
Cyclostoma asteliae (P.R. Johnst.) P.R. Johnst. 2024
Cyclostoma asteliae (P.R. Johnst.) P.R. Johnst.
Stictis asteliae P.R. Johnst.
Cyclostoma asteliae (P.R. Johnst.) P.R. Johnst. 2024
Stictis asteliae P.R. Johnst. (1983)
Collections
Identification keys
Metadata
267d8a05-d543-4c59-b5bd-42ff8953281d
scientific name
Names_Fungi
23 May 2024
23 May 2024